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Closest Facility service with asynchronous execution

Description

Finding the closest hospital to an accident, the closest police cars to a crime scene, and the closest store to a customer's address are all examples of problems that can be solved using the closest facility service. When finding the closest facilities, you can specify how many to find and whether the direction of travel is toward or away from them. Once you've found the closest facilities, you can display the best route to or from them and include the travel time, travel distance, and driving directions to each facility. The service can use current traffic conditions when determining the best routes. Additionally, you can specify an impedance cutoff beyond which the service should not search for a facility. For instance, you can set up a closest facility service to search for hospitals within 15 minutes' drive time of the site of an accident. Any hospitals that take longer than 15 minutes to reach will not be included in the results. The hospitals are referred to as facilities, and the accident is referred to as an incident. The service allows you to perform multiple closest facility analyses simultaneously. This means you can have multiple incidents and find the closest facility or facilities to each incident.

Request parameters

ParameterDescription
incidents

(Required)

Specify one or more locations from which the service searches for the nearby locations. These locations are referred to as incidents.

Syntax:

facilities

(Required)

Specify one or more locations that are searched for when finding the closest location.

Syntax:

token

(Required)

Provides the identity of a user that has the permissions to access the service.

f

(Required)

Specify the response format. The default response value is html.

Values: html | json | pjson

travel_mode

(Optional)

Choose the mode of transportation for the analysis.

Value: JSON object

measurement_units

(Optional)

Specify the units that should be used to report the total travel time or travel distance for the output routes. The default value is Minutes.

Values: Minutes | Meters | Kilometers | Feet | Yards | Miles | NauticalMiles | Seconds | Hours | Days

analysis_region

(Optional)

Specify the region in which to perform the analysis.

number_of_facilities_to_find

(Optional)

Specify the number of closest facilities to find per incident. The default value for this parameter is demonstrated in the example below:

number_of_facilities_to_find=1
cutoff

(Optional)

Specify the travel time or travel distance value at which to stop searching for facilities for a given incident. The default value for this parameter is null. To learn about the accepted values for this parameter, see the cutoff section below.

travel_direction

(Optional)

Specify whether you want to search for the closest facility as measured from the incident to the facility or from the facility to the incident. The default value is Incident To Facility.

Values: Incident To Facility | Facility to Incident

use_hierarchy

(Optional)

Specify whether hierarchy should be used when finding the shortest paths. The default value is true.

Values: true | false

time_of_day

(Optional)

Specify whether travel times should consider traffic conditions.

time_zone_for_time_of_day

(Optional)

Specifies the time zone of the time_of_day parameter. The default value is Geographically Local.

Values: Geographically Local | UTC

time_of_day_usage

(Optional)

Specify whether thetime_of_day parameter value represents the arrival or departure time for the routes. The default value is Start Time.

Values: Start Time | End Time

uturn_at_junctions

(Optional)

Restrict or allow the analysis to make U-turns at junctions. The default value is Allowed only at Intersections and Dead Ends.

Values: Allowed only at Intersections and Dead Ends | Allowed | Allowed only at Dead Ends | Not Allowed

point_barriers

(Optional)

Specify one or more points that act as temporary restrictions or represent additional time or distance that may be required to travel on the underlying streets.

Syntax:

line_barriers

(Optional)

Specify one or more lines that prohibit travel anywhere the lines intersect the streets.

Syntax:

polygon_barriers

(Optional)

Specify polygons that either completely restrict travel or proportionately scale the time or distance required to travel on the streets intersected by the polygons.

Syntax:

restrictions

(Optional)

Specify which restrictions should be honored by the service. To learn about the accepted values for this parameter, see the restrictions section below.

attribute_parameter_values

(Optional)

Specify additional values required by an attribute or restriction, such as to specify whether the restriction prohibits, avoids, or prefers travel on restricted roads. To learn about the accepted values for this parameter, see the attribute_parameter_values section below.

route_shape

(Optional)

Specify the type of route features that are output by the service. The default value is True Shape.

Values: True Shape | True Shape with Measures | Straight Line | None

route_line_simplification_tolerance

(Optional)

Specify by how much you want to simplify the route geometry returned by the service. To learn about the accepted values for this parameter, see the route_line_simplification_tolerance section below. The default value for this parameter is demonstrated in the example below. To learn more about the accepted values for this parameter, see the route_line_simplification_tolerance section below.

route_line_simplification_tolerance={"distance": 10,"units": "esriMeters"}
populate_directions

(Optional)

Specify whether the service should generate driving directions for each route. The default value is false.

Values: true | false

directions_language

(Optional)

Specify the language that should be used when generating driving directions. Applies only when the populate_directions parameter is set to true. The default value is en. To learn about the accepted values for this parameter, see the directions_language.

directions_distance_units

(Optional)

Units for displaying travel distance in the driving directions. Applies only when the populate_directions parameter is set to true. The default value is Miles.

Values: Miles | Kilometers | Meters | Feet | Yards | NauticalMiles

directions_style_name

(Optional)

Specify the name of the formatting style for the directions. Applies only when the populate_directions parameter is set to true. The default value is NA Desktop.

Values: NA Desktop | NA Navigation

impedance

(Optional)

Specify the impedance.

Values: TravelTime | Minutes | TruckTravelTime | TruckMinutes | WalkTime | Miles | Kilometers | TimeAt1KPH

save_route_data

(Optional)

Specify whether the service should create a .zip file that contains a file geodatabase holding the inputs and outputs of the analysis in a format that can be used to share route layers with your portal. The default value is false.

Values: true | false

save_output_network_analysis_layer

(Optional)

Specify if the service should save the analysis settings as a network analysis layer file. The default value is false.

Values: true | false

overrides

(Optional)

Specify additional settings that can influence the behavior of the solver.

Syntax

time_impedance

(Optional)

Specify the time-based impedance. To learn about the accepted values for this parameter, see the time_impedance section below.

distance_impedance

(Optional)

Specify the distance-based impedance. To learn about the accepted values for this parameter, see the distance_impedance section below.

output_format

(Optional)

Specify the format in which the output features are created. The default value is Feature Set.

Values: Feature Set | JSON File | GeoJSON File

env:outSR

(Optional)

Specify the spatial reference of the geometries. To learn about the accepted values for this parameter, see the env:outSR section below.

Required parameters

incidents

Use this parameter to specify one or more locations from which the service searches for the nearby locations. These locations are referred to as incidents.

The incidents parameter can be specified using a JSON structure that represents a set of features. The JSON structure can include the following properties:

  • url: Specify a REST query request to any ArcGIS Server feature, map, or geoprocessing service that returns a JSON feature set. This property is optional. However, either features or url must be specified.
  • spatialReference: Specifies the spatial reference for the geometries of incidents. This property is not required if the coordinate values are in the same spatial reference as your network dataset. If the coordinate values are in a different spatial reference, you need to specify the well-known ID (WKID) for the spatial reference. You can find the WKID for your spatial reference, depending on whether the coordinates are represented in a geographic coordinate system or a projected coordinate system.
  • features: Specify an array of features. This property is optional. However, either the features or url property must be specified.

Each feature in the features array represents an incident and contains the following properties:

  • geometry: Specifies the incident's geometry as a point containing x and y properties.
  • attributes: Specify each attribute as a key-value pair where the key is the name of a given field, and the value is the attribute value for the corresponding field.

Attributes for incidents

When specifying the incidents, you can set properties for each—such as its name or service time—using the following attributes:

  • Name

    The name of the incident. The name is used in the driving directions. If the name is not specified, a unique name prefixed with Location is automatically generated in the output routes and directions.

  • ID

    A unique identifier for the incident. The identifier is included in the output routes (as the IncidentID field) and can help join additional information from the output routes, such as the total travel time or total distance, to attributes from your incidents or vice versa. If the ID isn't specified, the service automatically generates a unique identifier for each incident.

  • AdditionalTime

    The amount of time spent at the incident, which is added to the total time of the route. The default value is 0.

    The units for this attribute value are specified by the measurement_units parameter. The attribute value is included in the analysis only when the measurement units are time-based.

    If you are finding the closest fire stations to fire incidents to estimate response times, for example, the AdditionalTime attribute can store the amount of time it takes firefighters to hook up their equipment at the location of the incident before they can begin fighting the fire.

  • AdditionalDistance

    The extra distance traveled at the incident, which is added to the total distance of the route. The default value is 0.

    The units for this attribute value are specified by the measurement_units parameter. The attribute value is included in the analysis only when the measurement units are distance-based.

    Generally, the location of an incident, such as a home, isn't exactly on the street; it is set back somewhat from the road. This attribute value can be used to model the distance between the incident location and its location on the street if it is important to include that distance in the total travel distance.

  • AdditionalCost

    The extra cost spent at the incident, which is added to the total cost of the route. The default value is 0.

    This attribute value should be used when the travel mode for the analysis uses an impedance attribute that is neither time-based nor distance-based The units for the attribute values are interpreted to be in unknown units.

  • TargetFacilityCount

    The number of facilities that need to be found for the given incident. This field allows you to specify a different number of facilities to find for each incident. For example, using this field you can find the three closest facilities from one incident and the two closest facilities from another incident.

  • Cutoff

    The impedance value at which to stop searching for facilities from a given incident. This attribute allows you to specify a different cutoff value for each incident. For example, using this attribute you can specify to search for facilities within five minutes travel time from one incident and to search for facilities within eight minutes travel time from another incident.

  • CurbApproach

    Specifies the direction a vehicle may arrive at and depart from the incident. The field value is specified as one of the following integers (use the numeric code, not the name in parentheses):

    You may see the descriptive names for CurbApproach attribute values when using ArcGIS Network Analyst extension software.

    • 0 (Either side of vehicle)—The vehicle can approach and depart the incident in either direction, so a U-turn is allowed at the incident. This setting can be chosen if it is possible and practical for a vehicle to turn around at the incident. This decision may depend on the width of the road and the amount of traffic or whether the incident has a parking lot where vehicles can pull in and turn around.

      Right side of vehicle
      Approaching the incident so that it's on the right side of the vehicle is allowed.
      Left side of vehicle
      Approaching the incident so that it's on the left side of the vehicle is allowed.

    • 1 (Right side of vehicle)—When the vehicle approaches and departs the incident, the curb must be on the right side of the vehicle. A U-turn is prohibited. This is typically used for vehicles such as buses that must arrive with the bus stop on the right-hand side.

      Right side of vehicle
      Approaching the incident so that it's on the right side of the vehicle is allowed.

    • 2 (Left side of vehicle)—When the vehicle approaches and departs the incident, the curb must be on the left side of the vehicle. A U-turn is prohibited. This is typically used for vehicles such as buses that must arrive with the bus stop on the left-hand side.

      Left side of vehicle
      Approaching the incident so that it's on the right side of the vehicle is allowed.

    The CurbApproach attribute is designed to work with both types of national driving standards: right-hand traffic (United States) and left-hand traffic (United Kingdom). First, consider an incident on the left side of a vehicle. It is always on the left side regardless of whether the vehicle travels on the left or right half of the road. What may change with national driving standards is your decision to approach an incident from one of two directions, that is, so it ends up on the right or left side of the vehicle. For example, if you want to arrive at an incident and not have a lane of traffic between the vehicle and the incident, you would choose 1 (Right side of vehicle) in the United States but 2 (Left side of vehicle) in the United Kingdom.

    Right side of vehicle with right-hand traffic.
    With right-hand traffic, the curb approach that leaves the vehicle closest to the stop is Right side of vehicle.
    Left side of vehicle with left-hand traffic
    With left-hand traffic, the curb approach that leaves the vehicle closest to the stop is Left side of vehicle.

  • Bearing

    The direction in which a point is moving. The units are degrees and are measured clockwise from true north. This field is used in conjunction with the BearingTol field.

    Bearing data is usually sent automatically from a mobile device equipped with a GPS receiver. Try to include bearing data if you are loading an input location that is moving, such as a pedestrian or a vehicle.

    Using this field tends to prevent adding locations to the wrong edges, which can occur when a vehicle is near an intersection or an overpass for example. Bearing also helps the tool determine on which side of the street the point is.

  • BearingTol

    The bearing tolerance value creates a range of acceptable bearing values when locating moving points on an edge using the Bearing field. If the value from the Bearing field is within the range of acceptable values that are generated from the bearing tolerance on an edge, the point can be added as a network location there; otherwise, the closest point on the next-nearest edge is evaluated.

    The units are in degrees, and the default value is 30. Values must be greater than 0 and less than 180. A value of 30 means that when ArcGIS Network Analyst extension attempts to add a network location on an edge, a range of acceptable bearing values is generated 15 degrees to either side of the edge (left and right) and in both digitized directions of the edge.

  • NavLatency

    This field is only used in the solve process if Bearing and BearingTol also have values; however, entering a NavLatency value is optional, even when values are present in Bearing and BearingTol. NavLatency indicates how much time is expected to elapse from the moment GPS information is sent from a moving vehicle to a server and the moment the processed route is received by the vehicle's navigation device.

    The time units of NavLatency are the same as the units specified by the timeUnits property of the analysis object.

Syntax examples for incidents

Syntax for specifying incidents using a JSON structure for features

{
  "spatialReference": {
    "wkid": <wkid>,
    "latestWkid": <wkid>
  },
  "features": [
    {
      "geometry": {
        "x": <x1>,
        "y": <y1>
      },
      "attributes": {
        "<field1>": <value11>,
        "<field2>": <value12>
      }
    },
    {
      "geometry": {
        "x": <x2>,
        "y": <y2>
      },
      "attributes": {
        "<field1>": <value21>,
        "<field2>": <value22>
      }
    }
  ] 
}

Syntax for specifying incidents using a URL returning a JSON response

{
  "url": "<url>"
}

Examples for incidents

Example one: Specifying incidents in the spatial reference of the network dataset, WGS84, using a JSON structure

The incident geometries are in the spatial reference of the network dataset, WGS84. Therefore, the spatialReference property is not specified. The example also shows how to specify some attributes for the incidents.

{
  "features": [
    {
      "geometry": {
        "y": 51.5254,
        "x": -0.1891
      },
      "attributes": {
        "Name": "Incident 1",
        "ID": "C100045", 
        "AdditionalTime": 5,
        "CurbApproach": 0
      }
    },
    {
      "geometry": {
        "y": 51.5353,
        "x": -0.1744
      },
      "attributes": {
        "Name": "Incident 2",
        "ID": "F100086",
        "AdditionalTime": 10,
        "CurbApproach": 0
      }
    }
  ]
}

Example two: Specifying incidents in the Web Mercator spatial reference using a JSON structure

The incident geometries are in the Web Mercator spatial reference and not in the spatial reference of the network dataset, WGS84. Therefore, the spatialReference property is required.

{
  "spatialReference": {
    "wkid": 102100
  },
  "features": [
    {
      "geometry": {
        "y": -5192521.476,
        "x": -2698533.989
      },
      "attributes": {
        "Name": "123 Main St", 
        "ID": "200156",
        "AdditionalDistance": 300
      }
    },
    {
      "geometry": {
        "y": -5191915.261,
        "x": -2697821.094
      },
      "attributes": {
        "Name": "845 Cypress Ave",
        "ID": "300242",
        "AdditionalDistance": 250
      }
    }
  ]
}

Example three: Specifying incidents using a URL

The URL makes a query for a few features from a map service. A URL querying features from a feature service can also be specified.

{
  "url": "https://machine.domain.com/webadaptor/rest/services/NetworkAnalysis/SanDiego/MapServer/21/query?where=1%3D1&outFields=Name&f=json"
}

facilities

Use this parameter to specify one or more locations that are searched for when finding the closest location. These locations are referred to as facilities.

The facilities parameter can be specified using a JSON structure that represents a set of features. The JSON structure can include the following properties:

  • url: Specify a REST query request to any ArcGIS Server feature, map, or geoprocessing service that returns a JSON feature set. This property is optional. However, either features or url must be specified.
  • spatialReference: Specifies the spatial reference for the geometries of facilities. This property is not required if the coordinate values are in the same spatial reference as your network dataset. If the coordinate values are in a different spatial reference, you must specify the well-known ID (WKID) for the spatial reference. You can find the WKID for your spatial reference depending on whether the coordinates are represented in a geographic coordinate system or a projected coordinate system.
  • fields: Lists the fields that are part of the input features representing facilities. This property is optional if you're using the default fields only. However, it's required if your facilities include custom fields.
  • features: Specify an array of features. This property is optional. However, either the features or url property must be specified.

Each feature in the features array represents an incident and contains the following properties:

  • geometry: Specifies the facility's geometry as a point containing x and y properties.
  • attributes: Specify each attribute as a key-value pair where the key is the name of a given field, and the value is the attribute value for the corresponding field.

Attributes for facilities

When specifying the facilities, you can set properties for each—such as its name or service time—using the following attributes:

  • Name

    The name of the facility. The name is used in the driving directions. If the name is not specified, a unique name prefixed with Location is automatically generated in the output routes and directions.

  • ID

    A unique identifier for the facility. The identifier is included in the output routes and the output closest facilities as FacilityID fields. The FacilityID field can be used to join additional information from the output routes, such as the total travel time or total distance, to attributes from your facilities. If the ID isn't specified, the service automatically generates a unique identifier for each facility.

  • AdditionalTime

    The amount of time spent at the facility, which is added to the total time of the route. The default value is 0.

    The units for this attribute value are specified by the measurement_units parameter. The attribute value is included in the analysis only when the measurement units are time-based.

    If you are finding the closest fire stations to fire incidents, for example, AdditionalTime can store the time it takes a crew to don the appropriate protective equipment and exit the fire station.

  • AdditionalDistance

    The extra distance traveled at the facility, which is added to the total distance of the route. The default value is 0.

    The units for this attribute value are specified by the measurement_units parameter. The attribute value is included in the analysis only when the measurement units are distance-based.

    Generally, the location of a facility, such as a fire station, isn't exactly on the street; it is set back somewhat from the road. AdditionalDistance can model the distance between the facility location and its location on the street if it is important to include that distance in the total travel distance.

  • AdditionalCost

    The extra cost spent at the facility, which is added to the total cost of the route. The default value is 0.

    This attribute value should be used when the travel mode for the analysis uses an impedance attribute that is neither time-based nor distance-based The units for the attribute values are interpreted to be in unknown units.

  • CutOff

    The impedance value at which to stop searching for incidents from a given facility. This attribute allows you to specify a different cutoff value for each facility. For example, using this attribute you can specify to search for incidents within five minutes of travel time from one facility and to search for incidents within eight minutes of travel time from another facility.

  • CurbApproach

    Specifies the direction a vehicle may arrive at and depart from the facility. The field value is specified as one of the following integers (use the numeric code, not the name in parentheses):

    You may see the descriptive names for CurbApproach attribute values when using ArcGIS Network Analyst extension software.

    SettingCoded valueDescription

    Either side of vehicle

    0

    The vehicle can approach or depart the facility in either direction.

    Right side of vehicle
    Approaching the facility so that it's on the right side of the vehicle is allowed.
    Left side of vehicle
    Approaching the facility so that it's on the left side of the vehicle is allowed.

    Right side of vehicle

    1

    When the vehicle approaches or departs the facility, the facility must be on the right side of the vehicle. This is typically used for vehicles such as buses that must arrive with the bus stop on the right-hand side.

    Right side of vehicle
    Approaching the facility so that it's on the right side of the vehicle is allowed.

    Left side of vehicle

    2

    When the vehicle approaches or departs the facility, the facility must be on the left side of the vehicle. This is typically used for vehicles such as buses that must arrive with the bus stop on the left-hand side.

    Left side of vehicle
    Approaching the facility so that it's on the right side of the vehicle is allowed.

    The CurbApproach attribute is designed to work with both types of national driving standards: right-hand traffic (United States) and left-hand traffic (United Kingdom). First, consider an incident on the left side of a vehicle. It is always on the left side regardless of whether the vehicle travels on the left or right half of the road. What may change with national driving standards is your decision to approach an incident from one of two directions, that is, so it ends up on the right or left side of the vehicle. For example, if you want to arrive at an incident and not have a lane of traffic between the vehicle and the incident, you would choose 1 (Right side of vehicle) in the United States but 2 (Left side of vehicle) in the United Kingdom.

    Right side of vehicle with right-hand traffic
    With right-hand traffic, the curb approach that leaves the vehicle closest to the stop is Right side of vehicle.
    Left side of vehicle with left-hand traffic
    With left-hand traffic, the curb approach that leaves the vehicle closest to the stop is Left side of vehicle.

  • Bearing

    The direction in which a point is moving. The units are degrees and are measured clockwise from true north. This field is used in conjunction with the BearingTol field.

    Bearing data is usually sent automatically from a mobile device equipped with a GPS receiver. Try to include bearing data if you are loading an input location that is moving, such as a pedestrian or a vehicle.

    Using this field tends to prevent adding locations to the wrong edges, which can occur when a vehicle is near an intersection or an overpass for example. Bearing also helps the tool determine on which side of the street the point is.

  • BearingTol

    The bearing tolerance value creates a range of acceptable bearing values when locating moving points on an edge using the Bearing field. If the value from the Bearing field is within the range of acceptable values that are generated from the bearing tolerance on an edge, the point can be added as a network location there; otherwise, the closest point on the next-nearest edge is evaluated.

    The units are in degrees, and the default value is 30. Values must be greater than 0 and less than 180. A value of 30 means that when ArcGIS Network Analyst extension attempts to add a network location on an edge, a range of acceptable bearing values is generated 15 degrees to either side of the edge (left and right) and in both digitized directions of the edge.

  • NavLatency

    This field is only used in the solve process if Bearing and BearingTol also have values; however, entering a NavLatency value is optional, even when values are present in Bearing and BearingTol. NavLatency indicates how much time is expected to elapse from the moment GPS information is sent from a moving vehicle to a server and the moment the processed route is received by the vehicle's navigation device.

    The time units of NavLatency are the same as the units specified by the timeUnits property of the analysis object.

Syntax examples for facilities

Syntax for specifying facilities using a JSON structure for features

{
  "spatialReference": {
    "wkid": <wkid>,
    "latestWkid": <wkid>
  },
  "features": [
    {
      "geometry": {
        "x": <x1>,
        "y": <y1>
      },
      "attributes": {
        "<field1>": <value1_1>,
        "<field2>": <value1_2>
      }
    },
    {
      "geometry": {
        "x": <x2>,
        "y": <y2>
      },
      "attributes": {
        "<field1>": <value2_1>,
        "<field2>": <value2_2>
      }
    }
  ] 
}

Syntax for specifying facilities with custom attributes using a JSON structure for features

{
  "spatialReference": {
    "wkid": <wkid>,
    "latestWkid": <wkid>
  },
  "fields": [
    {
      "name": <name1>,
      "type": <esriFieldType>,
      "alias": <alias1>,
      "length": <length>
    },
    {
      "name": <name2>,
      "type": <esriFieldType>,
      "alias": <alias2>,
      "length": <length>
    }
  ],
  "features": [
    {
      "geometry": {
        "x": <x1>,
        "y": <y1>
      },
      "attributes": {
        "<field1>": <value1_1>,
        "<field2>": <value1_2>
      }
    },
    {
      "geometry": {
        "x": <x2>,
        "y": <y2>
      },
      "attributes": {
        "<field1>": <value2_1>,
        "<field2>": <value2_2>
      }
    }
  ] 
}

Syntax for specifying facilities using a URL returning a JSON response

{
  "url": "<url>"
}

Examples for facilities

Example one: Specifying facilities in the spatial reference of the network dataset, WGS84, using JSON structure

The facility geometries are in the spatial reference of the network dataset, WGS84. Therefore, the spatialReference property is not specified. The example also shows how to specify some attributes for the facilities.

{
  "features": [
    {
      "geometry": {
        "y": 51.5254,
        "x": -0.1891
      },
      "attributes": {
        "Name": "Facility 1",
        "ID": "F100045", 
        "AdditionalTime": 5,
        "CurbApproach": 0
      }
    },
    {
      "geometry": {
        "y": 51.5353,
        "x": -0.1744
      },
      "attributes": {
        "Name": "Facility 2",
        "ID": "F100086",
        "AdditionalTime": 10,
        "CurbApproach": 0
      }
    }
  ]
}

Example two: Specifying facilities in the Web Mercator spatial reference using a JSON structure

The facility geometries are in the Web Mercator spatial reference and not in the spatial reference of the network dataset, WGS84. Therefore, the spatialReference property is required.

{
  "spatialReference": {
    "wkid": 102100
  },
  "features": [
    {
      "geometry": {
        "y": -5192521.476,
        "x": -2698533.989
      },
      "attributes": {
        "Name": "123 Main St", 
        "ID": "200156",
        "AdditionalDistance": 300
      }
    },
    {
      "geometry": {
        "y": -5191915.261,
        "x": -2697821.094
      },
      "attributes": {
        "Name": "845 Cypress Ave",
        "ID": "300242",
        "AdditionalDistance": 250
      }
    }
  ]
}

Example three: Specifying facilities with a custom field using JSON structure

In this example, the facilities include a custom field, PhoneNumber; therefore, the field schema must be defined in the fields attribute. The schema of default fields must also be defined whenever a custom field is present, so the schema of the Name field is also defined. The values for the fields are specified in the features attribute. The output closest facilities will include the custom field. The facility geometries are in WGS84, the spatial reference of the network dataset, so the spatialReference attribute isn't required.

{
  "fields": [
    {
      "name": "Name",
      "type": "esriFieldTypeString",
      "alias": "Name",
      "length": 128
    },
    {
      "name": "PhoneNumber",
      "type": "esriFieldTypeString",
      "alias": "PhoneNumber",
      "length": 12
    }
  ],
  "features": [
    {
      "geometry": {
        "x": -122.455962,
        "y": 37.751316
      },
      "attributes": {
        "Name": "Bank 9",
        "PhoneNumber": "999-999-9999"
      }
    },
    {
      "geometry": {
        "x": -122.440825,
        "y": 37.753199
      },
      "attributes": {
        "Name": "Bank 8",
        "PhoneNumber": "888-888-8888"
      }
    },
    {
      "geometry": {
        "x": -122.457844,
        "y": 37.740713
      },
      "attributes": {
        "Name": "Bank 7",
        "PhoneNumber": "777-777-7777"
      }
    }
  ]
}

Example four: Specifying facilities using a URL

The URL makes a query for a few features from a map service. A URL querying features from a feature service can also be specified.

{
  "url": "https://machine.domain.com/webadaptor/rest/services/NetworkAnalysis/SanDiego/MapServer/21/query?where=1%3D1&outFields=Name&f=json"
}

token

Use this parameter to specify a token that provides the identity of a user that has the permissions to access the service. The accessing services page provides more information on how such an access token can be obtained.

Example (replace <yourToken> with a valid token):
token=<yourToken>

f

Use this parameter to specify the response format. The parameter can have json or pjson as arguments, for example, f=json. The pjson value is used for printing the JSON response in a pretty format.

Optional parameters

travel_mode

Choose the mode of transportation for the analysis.

Travel modes are managed in ArcGIS Online and ArcGIS Enterprise can be configured by the administrator of your organization to better reflect your organization's workflows. You must specify the JSON object containing the settings for a travel mode supported by your organization. To get a list of supported travel modes, execute the GetTravelModes tool from the Utilities service.

The value for the travel_mode parameter should be a JSON object representing travel mode settings. When you use the GetTravelModes tool from the Utilities service, you get a string representing the travel mode JSON. You need to convert this string to a valid JSON object using your API and then pass the JSON object as the value for the travel_mode parameter.

For example, below is a string representing the Walking Time travel mode as returned by the GetTravelModes tool.

"{\"attributeParameterValues\": [{\"parameterName\": \"Restriction Usage\", \"attributeName\": \"Walking\", \"value\": \"PROHIBITED\"}, {\"parameterName\": \"Restriction Usage\", \"attributeName\": \"Preferred for Pedestrians\", \"value\": \"PREFER_LOW\"}, {\"parameterName\": \"Walking Speed (km/h)\", \"attributeName\": \"WalkTime\", \"value\": 5}], \"description\": \"Follows paths and roads that allow pedestrian traffic and finds solutions that optimize travel time. The walking speed is set to 5 kilometers per hour.\", \"impedanceAttributeName\": \"WalkTime\", \"simplificationToleranceUnits\": \"esriMeters\", \"uturnAtJunctions\": \"esriNFSBAllowBacktrack\", \"restrictionAttributeNames\": [\"Preferred for Pedestrians\", \"Walking\"], \"useHierarchy\": false, \"simplificationTolerance\": 2, \"timeAttributeName\": \"WalkTime\", \"distanceAttributeName\": \"Miles\", \"type\": \"WALK\", \"id\": \"caFAgoThrvUpkFBW\", \"name\": \"Walking Time\"}"

The above value should be converted to a valid JSON object and passed as the value for the travel_mode parameter.

travel_mode={"attributeParameterValues":[{"parameterName":"Restriction Usage","attributeName":"Walking","value":"PROHIBITED"},{"parameterName":"Restriction Usage","attributeName":"Preferred for Pedestrians","value":"PREFER_LOW"},{"parameterName":"Walking Speed (km/h)","attributeName":"WalkTime","value":5}],"description":"Follows paths and roads that allow pedestrian traffic and finds solutions that optimize travel time. The walking speed is set to 5 kilometers per hour.","impedanceAttributeName":"WalkTime","simplificationToleranceUnits":"esriMeters","uturnAtJunctions":"esriNFSBAllowBacktrack","restrictionAttributeNames":["Preferred for Pedestrians","Walking"],"useHierarchy":false,"simplificationTolerance":2,"timeAttributeName":"WalkTime","distanceAttributeName":"Miles","type":"WALK","id":"caFAgoThrvUpkFBW","name":"Walking Time"}

The default value,Custom, allows you to configure your own travel mode. When you pass in Custom, you can set values for the following parameters: impedance, time_impedance, distance_impedance, uturn_at_junctions, use_hierarchy, route_line_simplification_tolerance, restrictions, and attribute_parameter_values. You can choose Custom and set the custom travel mode parameters listed above, for example, to model a pedestrian with a fast walking speed or a truck with a given height, weight, and cargo of certain hazardous materials. You can try out different settings to get desired analysis results. Once you have identified the analysis settings, you should work with your organization's administrator and save these settings as part of new or existing travel mode so that everyone in your organization can rerun the analysis with the same settings.

The default values of the custom travel mode parameters model traveling by car. If you specify the travel mode as Custom or do not provide a value for the travel_mode parameter, the analysis will be similar to using the default Driving Time travel mode.

Caution:

When the travel_mode parameter is not set to Custom, this means you are choosing a travel mode configured by your organization, and the service automatically overrides the values of other parameters with values that model the chosen travel mode. The following parameters are overridden: impedance, time_impedance, distance_impedance, uturn_at_junctions, use_hierarchy, route_line_simplification_tolerance, restrictions, and attribute_parameter_values.

measurement_units

Use this parameter to specify the units that should be used to report the total travel time or travel distance for the output routes. The service finds the closest facility based on the travel time or the travel distance along the streets, depending on whether the units you specify as the value for this parameter are time- or distance-based.

The options are as follows:

  • Meters
  • Kilometers
  • Feet
  • Yards
  • Miles
  • NauticalMiles
  • Seconds
  • Minutes
  • Hours
  • Days

The default value is Minutes.

number_of_facilities_to_find

The number of closest facilities to find per incident. This is useful in situations in which multiple fire engines may be required from different fire stations, such as a fire. You can specify, for example, to find the three nearest fire stations to a fire.

The value set in this parameter can be overridden on a per-incident basis using the TargetFacilityCount field in the input incidents.

The tool can find up to 100 facilities from each incident.

cutoff

The travel time or travel distance value at which to stop searching for facilities for a given incident. For example, while finding the closest hospitals from the site of an accident, a cutoff value of 15 minutes means that the tool will search for the closest hospital within 15 minutes from the incident. If the closest hospital is 17 minutes away, no routes will be returned in the output routes. A cutoff value is especially useful when searching for multiple facilities.

When the Travel Direction parameter is set to Facility to Incident, the cutoff can be overridden on a per-facility basis using the Cutoff field in the input facilities. When the Travel Direction parameter is set to Incident To Facility, the cutoff can be overridden on a per-incident basis using the Cutoff field in the input incidents.

The units for this parameter are specified by the measurement_units parameter. The default value for this parameter is null, which indicates not to use any cutoff.

travel_direction

Use this parameter to specify whether you want to search for the closest facility as measured from the incident to the facility or from the facility to the incident. The parameter can be specified using the following values:

  • Facility to Incident—The direction of travel is from facilities to incidents.
  • Incident to Facility—The direction of travel is from incidents to facilities.

Using one of the parameter values can find different facilities because the travel time along some streets may vary based on traffic and one-way restrictions. For instance, a facility may be a 10-minute drive from the incident while traveling from the incident to the facility, but while traveling from the facility to the incident, it may be a 15-minute journey because traffic is slower in that direction. If you're setting a value for time_of_day, traffic may also cause the Facility to Incident and Incident to Facility options to return different results.

Fire departments commonly use the Facility to Incident value for the parameter, since they are concerned with the time it takes to travel from the fire station (facility) to the location of the emergency (incident). Management at a retail store (facility) is more concerned with the time it takes shoppers (incidents) to reach the store; therefore, store management commonly chooses Incident to Facility.

The default value for this parameter is Incident to Facility.

use_hierarchy

Specify whether hierarchy should be used when finding the shortest paths.

Caution:

The value of this parameter, regardless of whether you rely on the default or explicitly set a value, is overridden when travel_mode is set to any other value than Custom. The default value for travel_mode is Driving, so unless you set travel_mode to a different value, this parameter value will be overridden.

  • true—Use hierarchy when measuring between points. This is the default value. When hierarchy is used, the tool prefers higher-order streets (such as freeways) to lower-order streets (such as local roads), and can be used to simulate the driver preference of traveling on freeways instead of local roads even if that means a longer trip. This is especially true when finding routes to faraway locations, because drivers on long-distance trips tend to prefer traveling on freeways where stops, intersections, and turns can be avoided. Using hierarchy is computationally faster, especially for long-distance routes, since the tool can determine the best route from a relatively smaller subset of streets.

  • false—Do not use hierarchy when measuring between stops. If hierarchy is not used, the tool considers all the streets and doesn't prefer higher-order streets when finding the route. This is often used when finding short-distance routes within a city.

Caution:

The service automatically reverts to using hierarchy if the straight-line distance between the stops is greater than 50 miles (80.46 kilometers), even if you have specified to find the route without using hierarchy.

time_of_day

Specify whether travel times should consider traffic conditions. To include traffic in the analysis, choose a time-based unit for measurement_units and assign a value to time_of_day. The default value is null, which means the effect of changing traffic isn't included in the analysis.

Note:

This parameter is ignored when measurement_units is set to a distance-based unit.

The time_of_day value indicates the target start time of the routes in the analysis. If time_of_day_usage is set to End Time, the value represents when the routes should arrive at their nearby locations. The time is specified as Unix time (milliseconds since midnight, January 1, 1970).

If a time of day is not passed in, the service uses static road speeds based on average historical speeds or posted speed limits. It uses posted speeds in areas where historical traffic information isn't available.

Note:

Traffic is supported only with the driving time impedance or travel mode. It's not supported with trucking.

The service supports two kinds of traffic: typical and live. Typical traffic references travel speeds that are made up of historical averages for each five-minute interval spanning a week. Live traffic retrieves speeds from a traffic feed that processes phone probe records, sensors, and other data sources to record actual travel speeds and predict speeds for the near future. The Data Coverage page shows the countries Esri currently provides traffic data for.

All incidents must be in the same time zone when specifying the following:

  • A start time and traveling from incident to facility
  • An end time and traveling from facility to incident

All facilities must be in the same time zone when specifying the following:

  • A start time and traveling from facility to incident
  • An end time and traveling from incident to facility
Note:

The time zone for time_of_day can be UTC or the time zone or zones in which the points in facilities or incidents are located. Specify time zones with the time_zone_for_time_of_day parameter.

Typical traffic

To ensure that the task uses typical traffic in locations where it's available, choose a time and day of the week and convert the day of the week to one of the following dates from 1990:

  • Monday—1/1/1990
  • Tuesday—1/2/1990
  • Wednesday—1/3/1990
  • Thursday—1/4/1990
  • Friday—1/5/1990
  • Saturday—1/6/1990
  • Sunday—1/7/1990

Set the time and date as Unix time in milliseconds.

For example, to solve for 1:03 p.m. on Thursdays, set the time and date to 1:03 p.m., 4 January 1990, and convert to milliseconds (631458180000).

Note:

Although the dates representing days of the week are from 1990, typical traffic is calculated from recent traffic trends—usually over the last several months.

Examples for time_of_day

Example one: 13:03, 4 January 1990. Typical traffic on Thursdays at 1:03 p.m.

"time_of_day":  631458180000

Example two: 17:00, 7 January 1990. Typical traffic on Sundays at 5:00 p.m.

"time_of_day":  631731600000

Example three: 8:00, 22 October 2014. If the current time is between 8:00 p.m., 21 Oct. 2014 and 8:00 p.m., 22 Oct. 2014, live traffic speeds are referenced in the analysis; otherwise, typical traffic speeds are referenced.

"time_of_day": 1413964800000

Example four: 10:20, 18 March 2015. If the current time is between 10:20 p.m., 17 Mar. 2015 and 10:20 p.m., 18 Mar. 2015, live traffic speeds are referenced in the analysis; otherwise, typical traffic speeds are referenced.

"time_of_day": 1426674000000

time_zone_for_time_of_day

Specify the time zone or zones of the time_of_day parameter. There are two options: Geographically Local (default) and UTC.

Note:

This parameter is ignored when measurement_units is set to a distance-based unit.

All incidents must be in the same time zone when specifying the following:

  • A start time and traveling from incident to facility
  • An end time and traveling from facility to incident

All facilities must be in the same time zone when specifying the following:

  • A start time and traveling from facility to incident
  • An end time and traveling from incident to facility

Geographically Local

The time_of_day value refers to the time zone in which the input facilities or incidents are located. If the travel_direction and time_of_day_usage parameters indicate a departure or arrival time at the facilities, time_of_day refers to the time zone of the facilities. Likewise, if the two parameters indicate a departure or arrival time at the incidents, time_of_day refers to the time zone of incidents.

Geographically Local illustration: Setting time_of_day to 9:00 a.m., 4 January 1990 (631443600000 milliseconds) and time_zone_for_time_of_day to Geographically Local and submitting a valid request causes the drive times for points in the Eastern Time Zone to start at 9:00 a.m. (2:00 p.m. UTC).

UTC

The time_of_day value refers to Coordinated Universal Time (UTC).

UTC illustration: Setting time_of_day to 9:00 a.m., 4 January 1990 (631443600000 milliseconds) and time_zone_for_time_of_day to UTC, the start time for points in the Eastern Time Zone is 4:00 a.m. Eastern Time (9:00 a.m. UTC).

time_of_day_usage

Use this parameter to specify whether the time_of_day parameter value represents the arrival or departure time for the routes. The parameter can be specified using the following values:

  • Start Time: When this value is specified, the service finds the best route considering the time_of_day parameter value as the departure time from the facility or incident.
  • End Time: When this value is specified, the service considers the time_of_day parameter value as the arrival time at the facility or incident. This value is useful if you want to know what time to depart from a location so you arrive at the destination at the time specified in time_of_day.

The default value for this parameter is Start Time. The parameter value is ignored if the time_of_day parameter has a null value.

uturn_at_junctions

Use this parameter to restrict or allow the analysis to make U-turns at junctions.

Caution:

The value of this parameter, regardless of whether you rely on the default or explicitly set a value, is overridden when travel_mode is set to any other value than Custom. The default value for travel_mode is Driving, so unless you set travel_mode to a different value, this parameter value will be overridden.

In order to understand the available parameter values, consider for a moment that a junction is a point where only two streets intersect each other. If three or more streets intersect at a point, it is called as an intersection. A cul-de-sac is a dead-end. The parameter can have the following values:

Parameter ValueDescription

Allowed

U-turns are permitted everywhere. Allowing U-turns implies that the vehicle can turn around at a junction or intersection and double back on the same street.

U-turns are allowed
U-turns are permitted at junctions with any number of adjacent streets.

Allowed only at Intersections and Dead Ends

U-turns are prohibited at junctions where exactly two adjacent streets meet.

U-turns allowed only at intersections and dead-ends
U-turns are permitted only at intersections or dead ends.

Allowed only at Dead Ends

U-turns are prohibited at all junctions and interesections and are permitted only at dead ends.

U-turns allowed only at dead-ends
U-turns are permitted only at dead ends.

Not Allowed

U-turns are prohibited at all junctions, intersections, and dead-ends. Note that even when this parameter value is chosen, a route can still make U-turns at stops. If you wish to prohibit U-turns at a stop, you can set its CurbApproach property to the appropriate value (3).

The default value for this parameter is Allowed only at Intersections and Dead Ends.

point_barriers

Use this parameter to specify one or more points that act as temporary restrictions or represent additional time or distance that may be required to travel on the underlying streets. For example, a point barrier can be used to represent a fallen tree along a street or time delay spent at a railroad crossing.

The point_barriers parameter can be specified using a JSON structure that represents a set of features. The JSON structure can include the following properties:

  • url: Specify a REST query request to any ArcGIS Server feature, map, or geoprocessing service that returns a JSON feature set. This property is optional. However, either features or url must be specified.
  • spatialReference: Specifies the spatial reference for the geometries of point barriers. This property is not required if the coordinate values are in the same spatial reference as your network dataset. If the coordinate values are in a different spatial reference, you need to specify the well-known ID (WKID) for the spatial reference. See geographic coordinate systems and projected coordinate systems to look up WKID values.
  • features: Specify an array of features. This property is optional. However, either the features or url property must be specified.

Each feature in the features array represents a point barrier and contains the following properties:

  • geometry: Specifies the barrier's geometry as a point containing x and y properties.
  • attributes: Specify each attribute as a key-value pair where the key is the name of a given field and the value is the attribute value for the corresponding field.

Attributes for point_barriers

When specifying point barriers, you can set properties for each, such as its name or barrier type, using the following attributes:

  • Name

    The name of the barrier.

  • BarrierType

    Specifies whether the point barrier restricts travel completely or adds time or distance when it is crossed. The value for this attribute is specified as one of the following integers (use the numeric code, not the name in parentheses):

    • 0 (Restriction)—Prohibits travel through the barrier. The barrier is referred to as a restriction point barrier since it acts as a restriction.
      Two maps demonstrate how a restriction point barrier affects finding the best route.
      The map on the left shows the shortest path between two stops without any restriction point barriers. The map on the right has a road that is blocked by a fallen tree, so the shortest path between the same points is longer.
    • 2 (Added Cost)—Traveling through the barrier increases the travel time or distance by the amount specified in the Additional_Time, Additional_Distance, or Additional_Cost field. This barrier type is referred to as an added-cost point barrier.
      Two maps demonstrate how added-cost barriers affect finding the best route.
      The map on the left shows the shortest path between two stops without any added-cost point barrier. For the map on the right, the travel time from stop one to stop two would be the same whether going around the north end of the block or the south end; however, since crossing railroad tracks incurs a time penalty (modeled with added-cost point barriers), the route with only one railroad crossing is chosen. The cost of crossing the barrier is added to the accumulated travel time of the resulting route.
  • Additional_Time

    The added travel time when the barrier is traversed. This field is applicable only for added-cost barriers and only if the travel mode used for the analysis uses an impedance attribute that is time based.

    This field value must be greater than or equal to zero, and its units are the same as those specified in the Measurement Units parameter.

  • Additional_Distance

    The added distance when the barrier is traversed. This field is applicable only for added-cost barriers and only if the travel mode used for the analysis uses an impedance attribute that is distance based.

    The field value must be greater than or equal to zero, and its units are the same as those specified in the Measurement Units parameter.

  • Additional_Cost

    The added cost when the barrier is traversed. This field is applicable only for added-cost barriers and only if the travel mode used for the analysis uses an impedance attribute that is neither time based nor distance based.

  • FullEdge

    Specifies how the restriction point barriers are applied to the edge elements during the analysis. The field value is specified as one of the following integers (use the numeric code, not the name in parentheses):

    • 0 (False)—Permits travel on the edge up to the barrier but not through it. This is the default value.
    • 1 (True)—Restricts travel anywhere on the associated edge.

  • CurbApproach

    Specifies the direction of traffic that is affected by the barrier. The field value is specified as one of the following integers (use the numeric code, not the name in parentheses):

    • 0 (Either side of vehicle)—The barrier affects travel over the edge in both directions.
    • 1 (Right side of vehicle)—Vehicles are only affected if the barrier is on their right side during the approach. Vehicles that traverse the same edge but approach the barrier on their left side are not affected by the barrier.
    • 2 (Left side of vehicle)—Vehicles are only affected if the barrier is on their left side during the approach. Vehicles that traverse the same edge but approach the barrier on their right side are not affected by the barrier.

    Because junctions are points and don't have a side, barriers on junctions affect all vehicles regardless of the curb approach.

    The CurbApproach attribute is designed to work with both types of national driving standards: right-hand traffic (United States) and left-hand traffic (United Kingdom). First, consider a facility on the left side of a vehicle. It is always on the left side regardless of whether the vehicle travels on the left or right half of the road. What may change with national driving standards is your decision to approach a facility from one of two directions, that is, so it ends up on the right or left side of the vehicle. For example, if you want to arrive at a facility and not have a lane of traffic between the vehicle and the facility, you would choose 1 (Right side of vehicle) in the United States and 2 (Left side of vehicle) in the United Kingdom.

  • Bearing

    The direction in which a point is moving. The units are degrees and are measured clockwise from true north. This field is used in conjunction with the BearingTol field.

    Bearing data is usually sent automatically from a mobile device equipped with a GPS receiver. Try to include bearing data if you are loading an input location that is moving, such as a pedestrian or a vehicle.

    Using this field tends to prevent adding locations to the wrong edges, which can occur when a vehicle is near an intersection or an overpass for example. Bearing also helps the tool determine on which side of the street the point is.

  • BearingTol

    The bearing tolerance value creates a range of acceptable bearing values when locating moving points on an edge using the Bearing field. If the value from the Bearing field is within the range of acceptable values that are generated from the bearing tolerance on an edge, the point can be added as a network location there; otherwise, the closest point on the next-nearest edge is evaluated.

    The units are in degrees, and the default value is 30. Values must be greater than 0 and less than 180. A value of 30 means that when ArcGIS Network Analyst extension attempts to add a network location on an edge, a range of acceptable bearing values is generated 15 degrees to either side of the edge (left and right) and in both digitized directions of the edge.

  • NavLatency

    This field is only used in the solve process if Bearing and BearingTol also have values; however, entering a NavLatency value is optional, even when values are present in Bearing and BearingTol. NavLatency indicates how much time is expected to elapse from the moment GPS information is sent from a moving vehicle to a server and the moment the processed route is received by the vehicle's navigation device.

    The time units of NavLatency are the same as the units specified by the timeUnits property of the analysis object.

Syntax examples for point_barriers

Syntax for specifying point_barriers using a JSON structure for features

{
  "spatialReference": {
    "wkid": <wkid>,
    "latestWkid": <wkid>
  },
  "features": [
    {
      "geometry": {
        "x": <x1>,
        "y": <y1>
      },
      "attributes": {
        "<field1>": <value11>,
        "<field2>": <value12>
      }
    },
    {
      "geometry": {
        "x": <x2>,
        "y": <y2>
      },
      "attributes": {
        "<field1>": <value21>,
        "<field2>": <value22>
      }
    }
  ] 
}

Syntax for specifying point_barriers using a URL returning a JSON response

{
  "url": "<url>"
}

Examples for point_barriers

Example one: Specifying an added-cost point barrier in the spatial reference of the network dataset, WGS84, using JSON structure

This example shows how to use an added-cost point barrier to model a five-minute delay at a railroad crossing. The BarrierType attribute is used to specify the point barrier is added-cost, and the Additional_Time attribute is used to specify the added delay in minutes. The barrier geometries are in the spatial reference of the network dataset, WGS84. Therefore, the spatialReference property is not specified.

{
  "features": [
    {
      "geometry": {
        "x": 37.541479,
        "y": -122.053461
      },
      "attributes": {
        "Name": "Haley St railroad crossing",
        "BarrierType": 2,
        "Additional_Time": 5
      }
    }
  ]
}

Example two: Specifying restriction point barriers in the Web Mercator spatial reference using a JSON structure

This example shows how to use a restriction point barrier to model a road that's blocked by a fallen tree. The barrier's geometry is in the Web Mercator spatial reference and not in the spatial reference of the network dataset. Therefore, the spatialReference property is required.

{
  "spatialReference": {
    "wkid": 102100
  },
  "features": [
    {
      "geometry": {
        "y": -13635398.9398,
        "x": 4544699.034400001
      },
      "attributes": {
        "Name": "Fallen tree at 123 Main St", 
        "BarrierType": 0
      }
    }
  ]
}

Example three: Specifying point barriers using a URL

The URL makes a query for a few features from a map service. A URL querying features from a feature service can also be specified.

{
  "url": "https://machine.domain.com/webadaptor/rest/services/NetworkAnalysis/SanDiego/MapServer/21/query?where=1%3D1&outFields=Name&f=json"
}

line_barriers

Use this parameter to specify one or more lines that prohibit travel anywhere the lines intersect the streets. For example, a parade or protest that blocks traffic across several street segments can be modeled with a line barrier. A line barrier can also quickly fence off several roads from being traversed, thereby channeling possible routes away from undesirable parts of the street network.

Two maps demonstrate how a line barrier affects finding a route between two stops.
The map on the left displays the shortest path between two stops. The map on the right shows the shortest path when several streets are blocked by a line barrier.

The line_barriers parameter can be specified using a JSON structure that represents a set of features. The JSON structure can include the following properties:

  • url: Specify a REST query request to any ArcGIS Server feature, map, or geoprocessing service that returns a JSON feature set. This property is optional. However, either features or url must be specified.
  • spatialReference: Specifies the spatial reference for the geometries of the barriers. This property is not required if the coordinate values are in the same spatial reference as your network dataset. If the coordinate values are in a different spatial reference, you must specify the well-known ID (WKID) for the spatial reference. See geographic coordinate systems and projected coordinate systems to look up WKID values.
  • features: Specify an array of features. This property is optional. However, either the features or url property must be specified.

Each feature in the features array represents a line barrier and contains the following properties:

  • geometry: Specifies the barrier's geometry. The structure is based on ArcGIS REST polyline object. A polyline contains an array of paths. Each path is represented as an array of points, and each point in the path is represented as an array of numbers containing X and Y coordinate values at index 0 and 1, respectively.
  • attributes: Specify each attribute as a key-value pair where the key is the name of a given field, and the value is the attribute value for the corresponding field.

Attributes for line_barriers

When specifying the line barriers, you can set name and barrier type properties for each using the following attributes:

  • Name

    The name of the barrier.

Syntax examples for line_barriers

Syntax for specifying line barriers using a JSON structure for features

{
  "spatialReference": {
    "wkid": <wkid>,
    "latestWkid": <wkid>, 
  },
  "features": [
    {
      "geometry": {
        "paths": [
          [
            [
              <x11>,
              <y11>
            ],
            [
              <x12>,
              <y12>
            ]
          ],
          [
            [
              <x21>,
              <y21>
            ],
            [
              <x22>,
              <y22>
            ]
          ]
        ]
      },
      "attributes": {
        "<field1>": <value11>,
        "<field2>": <value12>
      }
    },
		  {
      "geometry": {
        "paths": [
          [
            [
              <x11>,
              <y11>
            ],
            [
              <x12>,
              <y12>
            ]
          ],
          [
            [
              <x21>,
              <y21>
            ],
            [
              <x22>,
              <y22>
            ]
          ]
        ]
      },
      "attributes": {
        "<field1>": <value21>,
        "<field2>": <value22>
      }
    }
  ] 
}

Syntax for specifying line barriers using a URL returning a JSON response

{
  "url": "<url>"
}

Examples for line_barriers

Example one: Specifying line barriers using a JSON structure in Web Mercator spatial reference

The example shows how to add two lines as line barriers to restrict travel on the streets intersected by the lines. Barrier 1 is a single-part line feature made up of two points. Barrier 2 is a two-part line feature whose first part is made up of three points and whose second part is made up of two points. The barrier geometries are in the Web Mercator spatial reference and not in the spatial reference of the network dataset. Therefore, the spatialReference property is required.

{
  "spatialReference": {
    "wkid": 102100
  },
  "features": [
    {
      "geometry": {
        "paths": [
          [
            [
              -10804823.397,
              3873688.372
            ],
            [
              -10804811.152,
              3873025.945
            ]
          ]
        ]
      },
      "attributes": {
        "Name": "Barrier 1"
      }
    },
    {
      "geometry": {
        "paths": [
          [
            [
              -10804823.397,
              3873688.372
            ],
            [
              -10804807.813,
              3873290.911
            ],
            [
              -10804811.152,
              3873025.945
            ]
          ],
          [
            [
              -10805032.678,
              3863358.76
            ],
            [
              -10805001.508,
              3862829.281
            ]
          ]
        ]
      },
      "attributes": {
        "Name": "Barrier 2"
      }
    }
  ]
}

Example two: Specifying line barriers using URL

The URL makes a query for a few features from a map service. A URL querying features from a feature service can also be specified.

{
  "url": "https://machine.domain.com/webadaptor/rest/services/Network/USA/MapServer/6/query?where=1%3D1&returnGeometry=true&f=json"
}

polygon_barriers

Use this parameter to specify polygons that either completely restrict travel or proportionately scale the time or distance required to travel on the streets intersected by the polygons.

The polygon_barriers parameter can be specified using a JSON structure that represents a set of features. The JSON structure can include the following properties:

  • url: Specify a REST query request to any ArcGIS Server feature, map, or geoprocessing service that returns a JSON feature set. This property is optional. However, either features or url must be specified.
  • spatialReference: Specifies the spatial reference for the geometries of barriers. This property is not required if the coordinate values are in the same spatial reference of your network dataset. If the coordinate values are in a different spatial reference, you must specify the well-known ID (WKID) for the spatial reference. See geographic coordinate systems and projected coordinate systems to look up WKID values.
  • features: Specify an array of features. This property is optional. However, either the features or url property must be specified.

Each feature in the features array represents a polygon barrier and contains the following properties:

  • geometry: Specifies the barrier's geometry. The structure is based on ArcGIS REST polygon object. A polygon contains an array of rings. The first point of each ring is always the same as the last point. Each point in the ring is represented as an array of numbers containing X and Y coordinate values at index 0 and 1, respectively.
  • attributes: Specify each attribute as a key-value pair where the key is the name of a given field, and the value is the attribute value for the corresponding field.

Attributes for polygon_barriers

When specifying the polygon barriers, you can set properties for each, such as its name or barrier type, using the following attributes:

  • Name

    The name of the barrier.

  • BarrierType

    Specifies whether the barrier restricts travel completely or scales the cost (such as time or distance) for traveling through it. The field value is specified as one of the following integers (use the numeric code, not the name in parentheses):

    • 0 (Restriction)—Prohibits traveling through any part of the barrier. The barrier is referred to as a restriction polygon barrier since it prohibits traveling on streets intersected by the barrier. One use of this type of barrier is to model floods covering areas of the street that make traveling on those streets impossible.
      Two maps demonstrate how a restriction polygon barrier affects finding a route between two stops.
      The left side depicts the shortest path between two stops. On the right, a polygon barrier blocks flooded streets, so the shortest path between the same two stops is different.
    • 1 (Scaled Cost)—Scales the time or distance required to travel the underlying streets by a factor specified using the ScaledTimeFactoror ScaledDistanceFactor field. If the streets are partially covered by the barrier, the travel time or distance is apportioned and then scaled. For example, a factor of 0.25 would mean that travel on underlying streets is expected to be four times faster than normal. A factor of 3.0 would mean it is expected to take three times longer than normal to travel on underlying streets. This barrier type is referred to as a scaled-cost polygon barrier. It can model storms that reduce travel speeds in specific regions.
      Two maps demonstrate how a scaled cost polygon barrier affects finding a route between two stops.
      The map on the left shows a route that goes through inclement weather without regard for the effect poor road conditions have on travel time. On the right, a scaled polygon barrier doubles the travel time of the roads covered by the storm. Notice the route still passes through the southern tip of the storm since it's quicker to spend more time driving slowly through a small part of the storm rather than driving completely around it. The service uses the modified travel time in calculating the best route; furthermore, the modified travel time is reported as the total travel time in the response.
  • ScaledTimeFactor

    This is the factor by which the travel time of the streets intersected by the barrier is multiplied. The field value must be greater than zero.

    This field is applicable only for scaled-cost barriers and only if the travel mode used for the analysis uses an impedance attribute that is time based.

  • ScaledDistanceFactor

    This is the factor by which the distance of the streets intersected by the barrier is multiplied. The field value must be greater than zero.

    This field is applicable only for scaled-cost barriers and only if the travel mode used for the analysis uses an impedance attribute that is distance based.

  • ScaledCostFactor

    This is the factor by which the cost of the streets intersected by the barrier is multiplied. The field value must be greater than zero.

    This field is applicable only for scaled-cost barriers and only if the travel mode used for the analysis uses an impedance attribute that is neither time based nor distance based.

Syntax examples for polygon_barriers

Syntax for specifying polygon barriers using a JSON structure for features

{
  "spatialReference": {
    "wkid": <wkid>,
    "latestWkid": <wkid>    
  }
  "features": [
    {
      "geometry": {
        "rings": [
          [
            [
              <x11>,
              <y11>
            ],
            [
              <x12>,
              <y12>
            ],
            [
              <x11>,
              <y11>
            ]
          ],
          [
            [
              <x21>,
              <y21>
            ],
            [
              <x22>,
              <y22>
            ]
            [
              <x21>,
              <y21>
            ]
          ]
        ]
      },
      "attributes": {
        "<field1>": <value11>,
        "<field2>": <value12>
      }
    },
    {
      "geometry": {
        "rings": [
          [
            [
              <x11>,
              <y11>
            ],
            [
              <x12>,
              <y12>
            ],
            [
              <x11>,
              <y11>
            ]
          ],
          [
            [
              <x21>,
              <y21>
            ],
            [
              <x22>,
              <y22>
            ],
            [
              <x21>,
              <y21>
            ]
          ]
        ]
      },
      "attributes": {
        "<field1>": <value21>,
        "<field2>": <value22>
      }
    }
  ]
}

Syntax for specifying polygon barriers using a URL returning a JSON response

{
  "url": "<url>"
}

Examples for polygon_barriers

Example one: Specifying polygon barriers using a JSON structure.

The example shows how to add two polygons as barriers. The first polygon named Flood zone is a restriction polygon barrier that prohibits travel on the underlying streets. The polygon is a single-part polygon feature made up of four points. The second polygon named Severe weather zone is a scaled-cost polygon barrier that increases the travel time on underlying streets to one third of the original value. The polygon is a two-part polygon feature. Both parts are made up of four points.

The barrier geometries are in the spatial reference of the network dataset, WGS84. Therefore, the spatialReference property is not required.

{
  "features": [
    {
      "geometry": {
        "rings": [
          [
            [
              -97.0634,
              32.8442
            ],
            [
              -97.0554,
              32.84
            ],
            [
              -97.0558,
              32.8327
            ],
            [
              -97.0638,
              32.83
            ],
            [
              -97.0634,
              32.8442
            ]
          ]
        ]
      },
      "attributes": {
        "Name": "Flood zone",
        "BarrierType": 0
      }
    },
    {
      "geometry": {
        "rings": [
          [
            [
              -97.0803,
              32.8235
            ],
            [
              -97.0776,
              32.8277
            ],
            [
              -97.074,
              32.8254
            ],
            [
              -97.0767,
              32.8227
            ],
            [
              -97.0803,
              32.8235
            ]
          ],
          [
            [
              -97.0871,
              32.8311
            ],
            [
              -97.0831,
              32.8292
            ],
            [
              -97.0853,
              32.8259
            ],
            [
              -97.0892,
              32.8279
            ],
            [
              -97.0871,
              32.8311
            ]
          ]
        ]
      },
      "attributes": {
        "Name": "Severe weather zone",
        "BarrierType": 1,
        "ScaledTimeFactor": 3
      }
    }
  ]
}

Example two: Specifying a polygon barrier using a URL

The URL makes a query for a few features from a map service. A URL querying features from a feature service can also be specified.

{
  "url": "https://machine.domain.com/webadaptor/rest/services/Network/USA/MapServer/7/query?where=1%3D1&returnGeometry=true&f=json"
}

restrictions

Use this parameter to specify which restrictions should be honored by the service. A restriction represents a driving preference or requirement. In most cases, restrictions cause roads or pathways to be prohibited, but they can also cause them to be avoided or preferred. For instance, using an Avoid Toll Roads restriction will result in a route that will include toll roads only when it is absolutely required to travel on toll roads in order to visit a stop. Height Restriction makes it possible to route around any clearances that are lower than the height of your vehicle. If you are carrying corrosive materials on your vehicle, using the Any Hazmat Prohibited restriction prevents hauling the materials along roads where it is marked as illegal to do so.

Caution:

The value for this parameter, regardless of whether you rely on the default or explicitly set a value, is used in the analysis only when the travel_mode parameter is set to Custom.

Note:

Some restrictions are supported only in certain countries. If you specify restriction names that are not available in the country where your input points are located, the service ignores the invalid restrictions and returns warning messages indicating the names for the restrictions that were not considered when performing the analysis.

Note:

Sometimes you need to specify an additional value, the restriction attribute parameter, on a restriction to get the intended results. This value needs to be associated with the restriction name and a restriction parameter using attribute_parameter_values.

The service supports the restriction names listed in the following table:

Restriction NameDescription

Any Hazmat Prohibited

The result will exclude roads where transporting any kind of hazardous material is prohibited.

Avoid Carpool Roads

The result will avoid roads designated exclusively for carpool (high-occupancy) vehicles.

Avoid Express Lanes

The result will avoid roads designated as express lanes.

Avoid Ferries

The result will avoid ferries.

Avoid Gates

The result will avoid roads where there are gates, such as keyed-access or guard-controlled entryways.

Avoid Limited Access Roads

The result will avoid roads designated as limited-access highways.

Avoid Private Roads

The result will avoid roads that are not publicly owned and maintained.

Avoid Roads Unsuitable for Pedestrians

The result will avoid roads that are unsuitable for pedestrians.

Avoid Stairways

The result will avoid all stairways on a pedestrian suitable route.

Avoid Toll Roads

The result will avoid toll roads.

Avoid Toll Roads for Trucks

The result will avoid all toll roads for trucks

Avoid Truck Restricted Roads

The result will avoid roads where trucks are not allowed except when making deliveries.

Avoid Unpaved Roads

The result will avoid roads that are not paved (for example, dirt, gravel, etc.).

Axle Count Restriction

The result will not include roads where trucks with the specified number of axles are prohibited. The number of axles can be specified using the Number of Axles restriction parameter.

Driving a Bus

The result will exclude roads where buses are prohibited. Using this restriction also ensures the route will honor one-way streets.

Driving a Taxi

The result will exclude roads where taxis are prohibited. Using this restriction also ensures the route will honor one-way streets.

Driving a Truck

The result will exclude roads where trucks are prohibited. Using this restriction also ensures the route will honor one-way streets.

Driving an Automobile

The result will exclude roads where automobiles are prohibited. Using this restriction also ensures the route will honor one-way streets.

Driving an Emergency Vehicle

The result will exclude roads where emergency vehicles are prohibited. Using this restriction also ensures the route will honor one-way streets.

Height Restriction

The result will exclude roads where the vehicle height exceeds the maximum allowed height for the road. The vehicle height can be specified using the Vehicle Height (meters) restriction parameter.

Kingpin to Rear Axle Length Restriction

The result will exclude roads where the vehicle kingpin-to-rear-axle length exceeds the maximum allowed for the road. The vehicle's length between the vehicle kingpin and the rear axle can be specified using the Vehicle Kingpin to Rear Axle Length (meters) restriction parameter.

Length Restriction

The result will exclude roads where the vehicle length exceeds the maximum allowed length for the road. The vehicle length can be specified using the Vehicle Length (meters) restriction parameter.

Preferred for Pedestrians

The result prefers paths designated for pedestrians.

Riding a Motorcycle

The result will exclude roads where motorcycles are prohibited. Using this restriction also ensures the route will honor one-way streets.

Roads Under Construction Prohibited

The result will exclude roads that are under construction.

Semi or Tractor with One or More Trailers Prohibited

The result will exclude roads where semis or tractors with one or more trailers are prohibited.

Single Axle Vehicles Prohibited

The result will exclude roads where vehicles with single axles are prohibited.

Tandem Axle Vehicles Prohibited

The result will exclude roads where vehicles with tandem axles are prohibited.

Through Traffic Prohibited

The result will exclude roads where through traffic (non-local) is prohibited.

Truck with Trailers Restriction

The result will exclude roads where trucks with the specified number of trailers on the truck are prohibited. The number of trailers on the truck can be specified using the Number of Trailers on Truck restriction parameter.

Use Preferred Hazmat Routes

The result will prefer roads designated for transporting any kind of hazardous materials.

Use Preferred Truck Routes

The result will prefer roads designated as truck routes, such as the roads that are part of the national network as specified by the National Surface Transportation Assistance Act in the United States, or roads that are designated as truck routes by the state or province, or or roads in an area that are generally more suitable for trucks.

Walking

The result will exclude roads where pedestrians are prohibited.

Weight Restriction

The result will exclude roads where the vehicle weight exceeds the maximum allowed weight for the road. The vehicle weight can be specified using the Vehicle Weight (kilograms) restriction parameter.

Weight per Axle Restriction

The result will exclude roads where the vehicle's weight per axle exceeds the maximum allowed for the road. The vehicle's weight per axle can be specified using the Vehicle Weight per Axle (kilograms) restriction parameter.

Width Restriction

The result will roads where the vehicle width exceeds the maximum allowed for the road. The vehicle width can be specified using the Vehicle Width(meters) restriction parameter.

Legacy:

The Driving a Delivery Vehicle restriction attribute is no longer available. The service will ignore this restriction since it is invalid. To achieve similar results, use the Driving a Truck restriction attribute along with the Avoid Truck Restricted Roads restriction attribute.

The restrictions parameter value is specified as a list of restriction names. A value of null indicates that no restrictions should be used when finding the best route, but only when travel_mode is set to Custom. The default value for this parameter is demonstrated in the example below:

restrictions=[Avoid Carpool Roads, Avoid Express Lanes, Avoid Gates, Avoid Private Roads, Avoid Unpaved Roads, Driving an Automobile, Roads Under Construction Prohibited, Through Traffic Prohibited]

Example for restrictions

restrictions=[Driving a Truck, Height Restriction, Length Restriction]

attribute_parameter_values

Use this parameter to specify additional values required by an attribute or restriction, such as to specify whether the restriction prohibits, avoids, or prefers travel on restricted roads. If the restriction is meant to avoid or prefer roads, you can further specify the degree to which they are avoided or preferred using this parameter.

Caution:

The value for this parameter, regardless of whether you rely on the default or explicitly set a value, is used in the analysis only when the travel_mode parameter is set to Custom.

The attributes_parameter_values parameter can be specified using a JSON structure that represents a set of features. The JSON structure can include the following properties:

  • url: Specify a REST query request to any ArcGIS Server feature, map, or geoprocessing service that returns a JSON feature set. This property is optional. However, either features or url must be specified.
  • features: Specify an array of features. This property is optional. However, either the features or url property must be specified.

Each feature in the features array represents an attribute parameter and contains the following properties:

  • attributes: Specify each attribute as a key-value pair where the key is the name of a given field, and the value is the attribute value for the corresponding field.
Note:

The JSON structure for the attribute_parameter_values parameter does not have a geometry property.

Attributes for attribute_parameter_values

The attribute_parameter_values parameter can be specified with the following attributes:

  • AttributeName: Lists the name of the restriction.
  • ParameterName: Lists the name of the parameter associated with the restriction. A restriction can have one or more ParameterName values based on its intended use, which implies you may need multiple attribute_parameter_values parameters for a single attribute name.
  • ParameterValue: The value for the ParameterName that is used by the service when evaluating the restriction.

Note:

In most cases, the attribute_parameter_values parameter is dependent on the restrictions parameter. The ParameterValue specified as part of attribute_parameter_values is applicable only if the restriction name is specified as the value for the restrictions parameter.

When specifying the attribute_parameter_values parameter, each restriction (listed as AttributeName) has a ParameterName value, Restriction Usage, that specifies whether the restriction prohibits, avoids, or prefers travel on the roads associated with the restriction and the degree to which the roads are avoided or preferred.

The Restriction Usage ParameterName can be assigned any of the following string values or their equivalent numeric values listed within the parentheses:

  • PROHIBITED (-1)—Travel on the roads using the restriction is completely prohibited.
  • AVOID_HIGH (5)—It is very unlikely for the service to include, in the results, roads that are associated with the restriction.
  • AVOID_MEDIUM (2)—It is unlikely for the service to include, in the results, roads that are associated with the restriction.
  • AVOID_LOW (1.3)—It is somewhat unlikely for the service to include, in the results, roads that are associated with the restriction.
  • PREFER_LOW (0.8)—It is somewhat likely for the service to include, in the results, results roads that are associated with the restriction.
  • PREFER_MEDIUM(0.5)—It is likely for the service to include, in the results, roads that are associated with the restriction.
  • PREFER_HIGH (0.2)—It is very likely for the service to include, in the results, roads that are associated with the restriction.

The following table lists the restriction names and the default restriction parameter values for all the restrictions. The default value for the attribute_parameter_values parameter is the JSON structure containing all the rows from the below table.

Tip:

If you want to use the default value for any restriction, AttributeName, ParameterName, and ParameterValue do not have to be specified as part of the attribute_parameter_values parameter.

AttributeNameParameterNameParameterValue

Any Hazmat Prohibited

Restriction Usage

PROHIBITED

Avoid Carpool Roads

Restriction Usage

PROHIBITED

Avoid Express Lanes

Restriction Usage

PROHIBITED

Avoid Ferries

Restriction Usage

AVOID_MEDIUM

Avoid Gates

Restriction Usage

AVOID_MEDIUM

Avoid Limited Access Roads

Restriction Usage

AVOID_MEDIUM

Avoid Private Roads

Restriction Usage

AVOID_MEDIUM

Avoid Roads Unsuitable for Pedestrians

Restriction Usage

AVOID_HIGH

Avoid Stairways

Restriction Usage

AVOID_HIGH

Avoid Toll Roads

Restriction Usage

AVOID_MEDIUM

Avoid Toll Roads for Trucks

Restriction Usage

AVOID_MEDIUM

Avoid Truck Restricted Roads

Restriction Usage

AVOID_HIGH

Avoid Unpaved Roads

Restriction Usage

AVOID_HIGH

Axle Count Restriction

Number of Axles

0

Restriction Usage

PROHIBITED

Driving a Bus

Restriction Usage

PROHIBITED

Driving a Taxi

Restriction Usage

PROHIBITED

Driving a Truck

Restriction Usage

PROHIBITED

Driving an Automobile

Restriction Usage

PROHIBITED

Driving an Emergency Vehicle

Restriction Usage

PROHIBITED

Height Restriction

Restriction Usage

PROHIBITED

Vehicle Height (meters)

0

Kingpin to Rear Axle Length Restriction

Restriction Usage

PROHIBITED

Vehicle Kingpin to Rear Axle Length (meters)

0

Length Restriction

Restriction Usage

PROHIBITED

Vehicle Length (meters)

0

Preferred for Pedestrians

Restriction Usage

PREFER_LOW

Riding a Motorcycle

Restriction Usage

PROHIBITED

Roads Under Construction Prohibited

Restriction Usage

PROHIBITED

Semi or Tractor with One or More Trailers Prohibited

Restriction Usage

PROHIBITED

Single Axle Vehicles Prohibited

Restriction Usage

PROHIBITED

Tandem Axle Vehicles Prohibited

Restriction Usage

PROHIBITED

Through Traffic Prohibited

Restriction Usage

AVOID_HIGH

Truck with Trailers Restriction

Restriction Usage

PROHIBITED

Number of Trailers on Truck

0

Use Preferred Hazmat Routes

Restriction Usage

PREFER_MEDIUM

Use Preferred Truck Routes

Restriction Usage

PREFER_HIGH

Walking

Restriction Usage

PROHIBITED

WalkTime

Walking Speed (km/h)

5

Weight Restriction

Restriction Usage

PROHIBITED

Vehicle Weight (kilograms)

0

Weight per Axle Restriction

Restriction Usage

PROHIBITED

Vehicle Weight per Axle (kilograms)

0

Width Restriction

Restriction Usage

PROHIBITED

Vehicle Width (meters)

0

Syntax example for attribute_parameter_values

Syntax for specifying attribute_parameter_values
{
    "features": [
        {
            "attributes": {
                "<field1>": <value11>,
                "<field2>": <value12>,
                "<field3>": <value13>

            }
        },
        {
            "attributes": {
                "<field1>": <value21>,
                "<field2>": <value22>,
                "<field3>": <value13>
            }
        }
    ] 
}

Examples for attribute_parameter_values

Example: Specifying the vehicle height and weight and a high preference to use designated truck routes

This example shows how to specify the height and weight of the vehicle for use with the height and weight restrictions respectively along with a high preference to include designated truck routes. This results in a route that does not include any roads where the clearance under overpasses or through tunnels is less than the vehicle height. The results will also not include any roads with load limited bridges or local roads that prohibit heavy vehicles if the vehicle weight exceeds the maximum permissible weight. However, the route will include as many roads as possible that are designated as preferred truck routes.

Note that the Restriction Usage ParameterName for the Height Restriction and the Weight Restriction restrictions are not specified since we want to use the default value of PROHIBITED for these restriction parameters.

attribute_parameter_values=
{
    "features": [
        {
            "attributes": {
                "AttributeName": "Height Restriction",
                "ParameterName": "Vehicle Height (meters)",
                "ParameterValue": 4.12
            }
        },
        {
            "attributes": {
                "AttributeName": "Weight Restriction",
                "ParameterName": "Vehicle Weight (kilograms)",
                "ParameterValue": 36287
            }
        },
        {
            "attributes": {
                "AttributeName": "Use Preferred Truck Routes",
                "ParameterName": "Restriction Usage",
                "ParameterValue": "PREFER_HIGH"
            }
        }
    ]
}

route_shape

Use this parameter to specify the type of route features that are output by the service. The parameter can be specified using one of the following values:

  • True Shape (default): Return the exact shape of the resulting route that is based on the underlying streets. Since this option creates the most detailed geometry for the output routes, choosing it tends to make the process run longer and create larger output files.
  • True Shape with Measures: Return the exact shape of the resulting route that is based on the underlying streets. Additionally, construct measures so the shape may be used in linear referencing. The measurements increase from the first stop and record the cumulative travel time or travel distance in the units specified by the measurement_units parameter.
  • Straight Line: Return a straight line between the route start and end.
  • None: Do not return any route shapes. This value can be useful in cases where you want to optimize performance and are only interested in determing the route's total travel time or travel distance, but not the route paths.

When the route_shape parameter is set to True Shape, or True Shape with Measure, the generalization of the route shape can be further controlled using the appropriate value for the route_ line_simplification_tolerance parameter.

No matter which value you choose for the route_shape parameter, the best route is always determined by minimizing the travel time or the travel distance, never using the straight-line distance between stops. This means that only the route shapes are different, not the underlying streets that are searched when finding the route.

Tip:

Specifying True Shape or True Shape with Measures creates the most detailed geometry for the output routes. So choosing these options tends to increase the response time for the request and also create larger responses. So use these options only when the exact route shape is required.

route_line_simplification_tolerance

Use this parameter to specify by how much you want to simplify the route geometry returned by the service.

Caution:

The value for this parameter, regardless of whether you rely on the default or explicitly set a value, is used in the analysis only when the travel_mode parameter is set to Custom.

This parameter is relevant only when route_shape is set to True Shape or True Shape with Measures because the other route_shape options cannot be simplified further.

Simplification maintains critical points on a route, such as turns at intersections, to define the essential shape of the route and removes other points. The simplification distance you specify is the maximum allowable offset that the simplified line can deviate from the original line. Simplifying a line reduces the number of vertices that are part of the route geometry. This reduces the overall response size and also improves the performance for drawing the route shapes in applications.

The parameter is specified as a JSON structure that includes the following properties:

  • distance: The simplification distance value.
  • units: The units for the simplification distance value. The property value should be specified as one of the following values: esriCentimeters, esriDecimalDegrees, esriDecimeters, esriFeet, esriInches, esriKilometers, esriMeters, esriMiles, esriMillimeters, esriNauticalMiles, esriPoints, and esriYards.

The default value for the route_line_simplification_tolerance parameter is 10 meters.

Syntax example for route_line_simplification_tolerance

Syntax for specifying route_line_simplification_tolerance
{
    "distance": <value>,
    "units": "<unit>"
}

Examples for route_line_simplification_tolerance

Example: Specifying route_line_simplification_tolerance of 10 meters
{
    "distance": 10,
    "units": "esriMeters"
}

populate_directions

Use this parameter to specify whether the service should generate driving directions for each route.

  • true—Generate directions. This is the default value. The directions are configued based on the values for the directions_language, directions_style_name, and directions_distance_units parameters.

  • false—Don't generate directions. The service returns an empty value for the features property within the output_directions output parameter.

directions_language

Use this parameter to specify the language that should be used when generating driving directions. This parameter is used only when the populate_directions parameter is set to true.

The parameter value can be specified using one of the following two- or five-character language codes:

  • ar—Arabic
  • bs—Bosnian
  • ca—Catalan
  • cs—Czech
  • da—Danish
  • de—German
  • el—Greek
  • en—English
  • es—Spanish
  • et—Estonian
  • fi—Finnish
  • fr—French
  • he—Hebrew
  • hi—Hindi
  • hr—Croatian
  • hu—Hungarian
  • id—Indonesian
  • it—Italian
  • ja—Japanese
  • ko—Korean
  • lt—Lithuanian
  • lv—Latvian
  • nb—Norwegian
  • nl—Dutch
  • pl—Polish
  • pt-BR—Brazilian Portuguese
  • pt-PT—European Portuguese
  • ro—Romanian
  • ru—Russian
  • sl—Slovenian
  • sr—Serbian
  • sv—Swedish
  • th—Thai
  • tr—Turkish
  • uk—Ukrainian
  • vi—Vietnamese
  • zh-CN—Simplified Chinese
  • zh-HK—Traditional Chinese (Hong Kong)
  • zh-TW—Traditional Chinese (Taiwan)

The tool first tries to find an exact match for the specified language including any language localization. If an exact match is not found, it tries to match the language family. If a match is still not found, the tool returns the directions using the default language, English. For example, if the directions language is specified as es-MX (Mexican Spanish), the tool will return the directions in Spanish as it supports es language code and not es-MX.

Caution:

If a language supports localization, such as Brazilian Portuguese (pt-BR) and European Portuguese (pt-PT), you should specify the language family and the localization. If you only specify the language family, the tool will not match the language family and instead return directions in the default language, English. For example, if the directions language is specified as pt, the tool will return the directions in English since it cannot decide if the directions should be returned in pt-BR or pt-PT.

directions_distance_units

Specify the units for displaying travel distance in the driving directions. This parameter is used only when the populate_directions parameter is set to true. The parameter can be specified using one of the following values:

  • Miles (default)
  • Kilometers
  • Meters
  • Feet
  • Yards
  • NauticalMiles

directions_style_name

Use this parameter to specify the name of the formatting style for the directions. This parameter is used only when the populate_directions parameter is set to true. The parameter can be specified using the following values:

  • NA Desktop (default)—Generates turn-by-turn directions suitable for printing.
  • NA Navigation—Generates turn-by-turn directions designed for an in-vehicle navigation device.

impedance

Specify the impedance, which is a value that represents the effort or cost of traveling along road segments or on other parts of the transportation network.

Travel time is an impedance; a car may take one minute to travel a mile along an empty road. Travel times can vary by travel mode—a pedestrian may take more than 20 minutes to walk the same mile, so it is important to choose the right impedance for the travel mode you are modeling.

Travel distance can also be an impedance; the length of a road in kilometers can be thought of as impedance. Travel distance in this sense is the same for all modes—a kilometer for a pedestrian is also a kilometer for a car. (What may change is the pathways on which the different modes are allowed to travel, which affects distance between points, and this is modeled by travel mode settings.)

Caution:

The value you provide for this parameter is ignored unless travel_mode is set to Custom, which is the default value.

Choose from the following impedance values:

  • TravelTime—takes advantage of historical and live traffic data and is good for modeling the time it takes automobiles to travel along roads at a specific time of the day using live traffic speed data where available. When using TravelTime, you can optionally specify the TravelTime::Vehicle Maximum Speed (km/h) attribute parameter to specify the physical limitation of the speed the vehicle is capable of traveling.
  • Minutes—does not use live traffic data but uses the historical average speeds for automobiles.
  • TruckTravelTime—takes advantage of historical and live traffic data, but caps the speed to the posted truck speed limit. This is good for modeling the time it takes for the trucks to travel along roads at a specific time. When using TruckTravelTime, you can optionally specify the TruckTravelTime::Vehicle Maximum Speed (km/h) attribute parameter to specify the physical limitation of the speed the truck is capable of traveling.
  • TruckMinutes—does not use live traffic data but uses the smaller of the historical average speeds for automobiles and the posted speed limits for trucks.
  • WalkTime—defaults to a speed of 5 km/hr on all roads and paths, but this can be configured through the WalkTime::Walking Speed (km/h) attribute parameter.
  • Miles—Stores length measurements along roads in miles and can be used for performing analysis based on shortest distance.
  • Kilometers—Stores length measurements along roads in kilometers and can be used for performing analysis based on shortest distance.
  • TimeAt1KPH—defaults to a speed of 1 km/hr on all roads and paths. The speed cannot be changed using any attribute parameters.

If you choose a time-based impedance, such as TravelTime, TruckTravelTime, Minutes, TruckMinutes, or WalkTime, the measurement_units parameter must be set to a time-based value; if you choose a distance-based impedance such as Miles, Kilometers, the measurement_units must be distance-based.

Legacy:

Drive Time, Truck Time, Walk Time, and Travel Distance impedance values are no longer supported and will be removed in a future release. If you use one of these values, the tool uses the value of the time_impedance parameter for time-based values or distance_impedance parameter for distance-based values.

analysis_region

Specify the region in which to perform the analysis.

save_route_data

Use this parameter to specify whether the service should create a zip file that contains a file geodatabase holding the inputs and outputs of the analysis in a format that can be used to share route layers with your portal.

  • true—Saves route data. The route data zip file can be downloaded from the URL provided as part of the output_route_data parameter.

  • false—Don't save route data. This is the default value.

save_output_network_analysis_layer

Use this parameter to specify if the service should save the analysis settings as a network analysis layer file. You cannot directly work with this file even when you open the file in an ArcGIS Desktop application like ArcMap. It is meant to be sent to Esri Technical Support in order to diagnose the quality of results returned from the service.

  • true—Saves network analysis layer file. The file can be downloaded from the URL provided as part of the output_network_analysis_layer parameter.

  • false—Don't save network analysis layer file. This is the default value.

overrides

Specify additional settings that can influence the behavior of the solver when finding solutions for the network analysis problems.

The value for this parameter needs to be specified in JavaScript Object Notation (JSON). The values can be either a number, Boolean, or a string.

{
"overrideSetting1" : "value1", 
"overrideSetting2" : "value2"
}

The default value for this parameter is no value, which indicates not to override any solver settings.

Overrides are advanced settings that should be used only after careful analysis of the results obtained before and after applying the settings. A list of supported override settings for each solver and their acceptable values can be obtained by contacting Esri Technical Support.

time_impedance

The time-based impedance, which is a value that represents the travel time along road segments or on other parts of the transportation network.

Note:

If the impedance for the travel mode, as specified using the Impedance parameter,

is time based, the value for Time Impedance and Impedance parameters must be identical. Otherwise, the service will return an error.

distance_impedance

The distance-based impedance, which is a value that represents the travel distance along road segments or on other parts of the transportation network.

Note:

If the impedance for the travel mode, as specified using the Impedance parameter,

is distance based, the value for Distance Impedance and Impedance parameters must be identical. Otherwise, the service will return an error.

output_format

Specifies the format in which the output features will be created.

Choose from the following options:

  • Feature Set—The output features will be returned as feature classes and tables. This is the default.
  • JSON File—The output features will be returned as a compressed file containing the JSON representation of the outputs. When this option is specified, the output is a single file (with a .zip extension) that contains one or more JSON files (with a .json extension) for each of the outputs created by the service.
  • GeoJSON File—The output features will be returned as a compressed file containing the GeoJSON representation of the outputs. When this option is specified, the output is a single file (with a .zip extension) that contains one or more GeoJSON files (with a .geojson extension) for each of the outputs created by the service.

Tip:

Specifying file based output format, such asJSON File, is useful when you are calling the service using the REST endpoint of the service. In such cases, returning all the outputs as a single file allows you to download large results that can be generated by the service. For example, if you are working with GenerateOriginDestinationCostMatrix service and you generate a travel matrix with 1,000,000 records, returning such a large output as a Feature Set can cause the service to fail since the service will try to send the entire output in a single attempt. With a file based output, the service sends the output in multiple chunks reducing the possibility of timeouts when returning the outputs.

env:outSR

Use this parameter to specify the spatial reference of the geometries, such as the routes or the directions, returned by the service.

The parameter value can be specified as a well-known ID (WKID) for the spatial reference. If env:outSR is not specified, the geometries are returned in the default spatial reference, WGS84. See Geographic coordinate systems and Projected coordinate systems to look up WKID values.

Many of the basemaps provided by ArcGIS Online are in the Web Mercator spatial reference (WKID 102100). Specifying env:outSR=102100 returns the geometries in the Web Mercator spatial reference, which can be drawn on top of the basemaps.

Output parameters

Upon successful execution, the service returns the best route and driving directions between the incident and the chosen facility and the status indicating if the analysis was successful using the following output parameters:

Output_Closest_Facilities and Closest_Facilities

This output parameter gives you access to the facilities that were closest to the incidents. It provides the location of the facilities and attribute information from the corresponding input facilities.

The output_closest_facilities parameter includes only those facilities from the set of input facilities that were closest to at least one incident. Conversely, the output_facilities data type includes all the facilities from the analysis including the facilities that cannot be reached from any of the incidents. You can use the Status field from the output_facilities data type to determine why a facility was not used in the analysis.

The following table lists the fields that are returned for output facilities:

Field nameDescription

Name

The name of the facility. The values for this field are copied from the Name field on the input facilities.

SourceID

The numeric identifier of the source feature class containing the source feature on which the network is located.

SourceOID

The numeric identifier of the source feature in the source feature class.

PosAlong

The position along the digitized direction of the source line feature. This value is stored as a ratio. For example, a value of 0.47 indicates that the point is positioned 47 percent from the start of the source line feature.

SideOfEdge

The side of the edge in relation to the digitized direction of the line feature. The field can have one of the two possible values. A value of 1 indicates that the point is on the right side of the line feature, and a value of 2 indicates that the point is on the left side of the line feature.

CurbApproach

The direction a vehicle may arrive at and depart from the facility. The values for this field are copied from the CurbApproach field on the input facilities.

Status

Indicates how the facility was evaluated in the analysis. The possible values are the following:

  • 0 (OK)—The facility was successfully located on the transportation network and analyzed.
  • 1 (Not Located)—The facility was not included in the analysis since a traversable road was not found within the maximum search distance from the facility.
  • 3 (Elements not traversable)—The network element that the facility is on is not traversable. This can occur when the network element is restricted by a restriction attribute.
  • 4 (Invalid Field Values)—Field values fall outside a range or coded-value domain. For example, a negative number may exist where positive numbers are required.
  • 5 (Not Reached)—The facility couldn't be reached due to constraints; for example, a curb approach is set so that a vehicle must travel in the wrong direction on a one-way street to reach the facility.
  • 7 (Not located on closest)—The closest network location to the facility is not traversable because of a restriction or barrier, so the facility has been located on the closest traversable network feature instead.

SnapX

The x-coordinate value for the computed network location.

SnapY

The y-coordinate value for the computed network location.

SnapZ

The z-coordinate value for the computed network location.

The field has a nonzero value only when the input network dataset supports connectivity based on z-coordinate values of the network sources.

DistanceToNetworkInMeters

The distance, in meters, between the location of the point feature and its computed network location.

AdditionalTime

The amount of time added to the total route time when this facility is visited. The values for this field are copied from the AdditionalTime field on the input facilities.

AdditionalDistance

The amount of distance added to the total route distance when this facility is visited. The values for this field are copied from the AdditionalDistance field on the input facilities.

AdditionalCost

The cost added to the total route cost when this facility is visited. The values for this field are copied from the AdditionalCost field on the input facilities. This field is included only when the travel mode used for the analysis has an impedance attribute that is neither time based nor distance based.

Cutoff

The impedance value at which the analysis stopped searching for the facilities from a given incident. The values for this field are copied from the Cutoff field on the input facilities.

ID

A unique identifier for the facility. The values for this field are copied from the ID field on the input facilities.

ORIG_FID

FacilityOID

The ObjectID value of the input facility. This field is often used to join information from the input facilities.

The OutputFacilities data type includes the ORIG_FID field and Facilities data type, which include the FacilityOID field.

Bearing

The values for this field are copied from the Bearing field on the input facilities.

BearingTol

The values for this field are copied from the BearingTol field on the input facilities.

NavLatency

The values for this field are copied from the NavLatency field on the input facilities.

Syntax example for Output_Closest_Facilities

The output_closest_facilities parameter is returned as a JSON feature set with following syntax:

{
  "paramName": "Output_Closest_Facilities",
  "dataType": "GPFeatureRecordSetLayer",
  "value": {
    "displayFieldName": "",
    "geometryType": "esriGeometryPoint",
    "spatialReference": {
      "wkid": <wkid>,
      "latestWkid": <wkid>
    },
    "fields": [
      {
        "name": "<field1Name>",
        "type": "<field1Type>",
        "alias": "<field1Alias>",
        "length": "<field1Length>"
      },
      {
        "name": "<field2Name>",
        "type": "<field2Type>",
        "alias": "<field2Alias>",
        "length": "<field2Length>"
      }
    ],
    "features": [
      {
        "attributes": {
          "<field1>": <value11>,
          "<field2>": <value12>
        },
        "geometry": {
          "x": <x11>,
          "y": <y11>
        }
      },
      {
        "attributes": {
          "<field1>": <value21>,
          "<field2>": <value22>
        },
        "geometry": {
          "x": <x21>,
          "y": <y21>
        }
      ],
      "exceededTransferLimit": <true|false>
    }
  }
}

Example for Output_Closest_Facilities

The following shows an example of the output_closest_facilities parameter:

{
  "paramName": "Output_Closest_Facilities",
  "dataType": "GPFeatureRecordSetLayer",
  "value": {
    "displayFieldName": "",
    "geometryType": "esriGeometryPoint",
    "spatialReference": {
      "wkid": 4326,
      "latestWkid": 4326
    },
    "fields": [
      {
        "name": "OID",
        "type": "esriFieldTypeOID",
        "alias": "OID"
      },
      {
        "name": "Name",
        "type": "esriFieldTypeString",
        "alias": "Name",
        "length": 128
      },
      {
        "name": "CurbApproach",
        "type": "esriFieldTypeInteger",
        "alias": "CurbApproach"
      },
      {
        "name": "ORIG_FID",
        "type": "esriFieldTypeSmallInteger",
        "alias": "ORIG_FID"
      }
    ],
    "features": [
      {
        "attributes": {
          "OID": 1,
          "Name": "Location 1",
          "CurbApproach": 0,
          "ORIG_FID": 1
        },
        "geometry": {
          "x": -122.45596200044594,
          "y": 37.75131599973366
        }
      },
      {
        "attributes": {
          "OID": 2,
          "Name": "Location 3",
          "CurbApproach": 0,
          "ORIG_FID": 3
        },
        "geometry": {
          "x": -122.45784400000059,
          "y": 37.74071300000497
        }
      }
    ],
    "exceededTransferLimit": false
  }
}

Output_Incidents

This provides access to the locations used as starting or ending points in a closest facility analysis.

The following table lists the fields that are returned for output incidents:

FieldDescription

Name

The name of the incident. The values for this field are copied from the Name field on input incidents.

TargetFacilityCount

The number of facilities that need to be found for the given incident. The values for this field are copied from the TargetFacilityCount field on the input incident.

SourceID

The numeric identifier of the source feature class containing the source feature on which the network is located.

SourceOID

The numeric identifier of the source feature in the source feature class.

PosAlong

The position along the digitized direction of the source line feature. This value is stored as a ratio. For example, a value of 0.47 indicates that the point is positioned 47 percent from the start of the source line feature.

SideOfEdge

The side of the edge in relation to the digitized direction of the line feature. The field can have one of the two possible values. A value of 1 indicates that the point is on the right side of the line feature, and a value of 2 indicates that the point is on the left side of the line feature.

CurbApproach

The direction a vehicle may arrive at and depart from the incident. The values for this field are copied from the CurbApproach field on the input incident.

Status

Indicates how the incident was evaluated in the analysis. The possible values are the following:

SnapX

The x-coordinate value for the computed network location.

SnapY

The y-coordinate value for the computed network location.

SnapZ

The z-coordinate value for the computed network location.

The field has a nonzero value only when the input network dataset supports connectivity based on z-coordinate values of the network sources.

DistanceToNetworkInMeters

The distance, in meters, between the location of the point feature and its computed network location.

AdditonalTime

The amount of time added to the total route time when this incident is visited. The values for this field are copied from the AdditionalTime field on the input incident.

AdditionalDistance

The amount of distance added to the total route distance when this incident is visited. The values for this field are copied from the AdditionalDistance field on the input incident.

AdditionalCost

The cost added to the total route cost when this incident is visited. The values for this field are copied from the AdditionalCost field on the input incident. This field is included only when the travel mode used for the analysis has an impedance attribute that is neither time based nor distance based.

Cutoff

The impedance value at which the analysis stopped searching for the incidents from a given facility. The values for this field are copied from the Cutoff field on the input incident.

IncidentOID

The ObjectID value of the input incident. This field is often used to join information from the input facilities.

Bearing

The values for this field are copied from the Bearing field on the input facilities.

BearingTol

The values for this field are copied from the BearingTol field on the input facilities.

NavLatency

The values for this field are copied from the NavLatency field on the input facilities.

Output_Routes

This provides access to the resulting route or routes between the facilities and the incidents.

The route_shape and route_line_simplification_tolerance parameters influence the shape of the output routes.

The route geometries are returned in the spatial reference specified as the env:outSR parameter.

The following provides a description of fields that are returned for each route:

Field nameDescription

Name

The name of the closest facility route is based on the names of the associated facility and incident.

The facility name is first if the value for the travel_direction parameter is set to Facility to Incident. For example, Facility 5 - Incident 3 indicates that the route travels from Facility 5 to Incident 3.

If Incident to Facility is specified as the value for the travel_direction parameter, the incident name is first, for example, Incident 3 — Facility 5.

FacilityRank

The rank of the facility among all facilities found for the associated incident; the closest facility has a rank of 1.

FacilityID

The unique ID of the facility the route visits. The values for this field are copied from the ID field on the input facilities.

FacilityOID

The ObjectID value of the input facility used to generate the route. This field is often used to join information from facilities to routes.

IncidentID

The unique ID of the incident the route visits. The values for this field are copied from the ID field on input incidents .

IncidentOID

The ObjectID value of the input incident used to generate the route. This field is often used to join information from incidents to routes.

FacilityCurbApproach

Describes the side of the vehicle the facility is on when arriving at or departing from the facility. A value of 1 means the right side of vehicle; a value of 2 indicates the left side.

IncidentCurbApproach

Describes the side of the vehicle the incident is on when arriving at or departing from the incident. A value of 1 means the right side of the vehicle; a value of 2 indicates the left side.

StartTime

The start time of the route, reported in the time zone in which the first stop is located.

EndTime

The end time of the route, reported in the time zone in which the last stop is located.

StartTimeUTC

The start time of the route in coordinated universal time (UTC).

EndTimeUTC

The end time of the route in coordinated universal time (UTC).

Total_Minutes

The cumulative travel time in minutes of the route between the facility and the incident. This includes any AdditionalTime for the visited facility and incident if specified.

Note:

An additional field, Total_[TimeUnits], is included if the measurement_units parameter is time based and its value is not Minutes. The field values are in the units specified by the measurement_units parameter.

Note:

Additional fields, Total_[AccumulateAttributeName]_[TimeUnits], are included for each time-based cost attribute that is accumulated during the analysis.

Total_Miles

The cumulative travel distance in miles of the route between the facility and the incident. This includes any AdditionalDistance for the visited facility and incident if specified.

Note:

An additional field, Total_[DistanceUnits], is included if the measurement_units parameter is distance based and its value is not Miles or Kilometers. The field values are in the units specified by the measurement_units parameter.

Note:

Additional fields, Total_[AccumulateAttributeName]_[DistanceUnits], are included for each distance-based cost attribute that is accumulated during the analysis.

Total_Kilometers

The cumulative travel distance in kilometers of the route between the facility and the incident. This includes any AdditionalDistance for the visited facility and incident if specified.

Note:

An additional field, Total_[DistanceUnits], is included if the measurement_units parameter is distance based and its value is not Miles or Kilometers. The field values are in the units specified by the measurement_units parameter.

Note:

Additional fields, Total_[AccumulateAttributeName]_[DistanceUnits], are included for each distance-based cost attribute that is accumulated during the analysis.

Total_Other

The cumulative travel cost in unknown units of the route between the facility and the incident. This includes any AdditionalCost for the visited facility and incident if specified.

This field is included only when the travel mode used for the analysis has an impedance attribute that is neither time based nor distance based.

Note:

Additional fields Total_[AccumulateAttributeName]_Other are included for each cost attribute that is neither time-based nor distance-based and accumulated during the analysis.

Note:

An additional field with the name Total_[MeasurementUnits] is included if the measurement_units parameter is not equal to Miles, Kilometers, or Minutes. For example, if the measurement_units parameter is specified as Meters, the output_routes parameter will include Total_Meters, Total_Miles, Total_Kilometers, and Total_Minutes fields.

Syntax example for output_routes

The output_routes parameter is returned as a JSON feature set with following syntax:

{
  "paramName": "Output_Routes",
  "dataType": "GPFeatureRecordSetLayer",
  "value": {
    "displayFieldName": "",
    "geometryType": "esriGeometryPolyline",
    "spatialReference": {
      "wkid": <wkid>,
      "latestWkid": <wkid>,
    },
    "fields": [
      {
        "name": "<field1Name>",
        "type": "<field1Type>",
        "alias": "<field1Alias>",
        "length": "<field1Length>" //length is included only for esriFieldTypeString
      },
      {
        "name": "<field2Name>",
        "type": "<field2Type>",
        "alias": "<field2Alias>",
        "length": "<field2Length>"
      }
    ],
    "features": [
      {
        "geometry": {
          "paths": [
            [
              [
                <x11>,
                <y11>
              ],
              [
                <x12>,
                <y12>
              ]
            ],
            [
              [
                <x21>,
                <y21>
              ],
              [
                <x22>,
                <y22>
              ]
            ]
          ]
        },
        "attributes": {
          "<field1>": <value11>,
          "<field2>": <value12>
        }
      },
      {
        "geometry": {
          "paths": [
            [
              [
                <x11>,
                <y11>
              ],
              [
                <x12>,
                <y12>
              ]
            ],
            [
              [
                <x21>,
                <y21>
              ],
              [
                <x22>,
                <y22>
              ]
            ]
          ]
        },
        "attributes": {
          "<field1>": <value21>,
          "<field2>": <value22>
        }
      }
    ],
    "exceededTransferLimit": <true|false>
  }
}

Example for output_routes

The following shows an example of the output_routes parameter:

Note:

Because the response is quite verbose, the repeated elements within the response are abbreviated for clarity.

{
  "paramName": "Output_Routes",
  "dataType": "GPFeatureRecordSetLayer",
  "value": {
    "displayFieldName": "",
    "geometryType": "esriGeometryPolyline",
    "spatialReference": {
      "wkid": 4326,
      "latestWkid": 4326
    },
    "fields": [
      {
        "name": "OID",
        "type": "esriFieldTypeOID",
        "alias": "OID"
      },
      {
        "name": "FacilityID",
        "type": "esriFieldTypeString",
        "alias": "FacilityID",
        "length": 50
      },
      {
        "name": "FacilityRank",
        "type": "esriFieldTypeInteger",
        "alias": "FacilityRank"
      },
      {
        "name": "Name",
        "type": "esriFieldTypeString",
        "alias": "Name",
        "length": 128
      },
      {
        "name": "IncidentCurbApproach",
        "type": "esriFieldTypeInteger",
        "alias": "IncidentCurbApproach"
      },
      {
        "name": "FacilityCurbApproach",
        "type": "esriFieldTypeInteger",
        "alias": "FacilityCurbApproach"
      },
      {
        "name": "IncidentID",
        "type": "esriFieldTypeString",
        "alias": "IncidentID",
        "length": 50
      },
      {
        "name": "Total_Miles",
        "type": "esriFieldTypeDouble",
        "alias": "Total_Miles"
      },
      {
        "name": "Total_Kilometers",
        "type": "esriFieldTypeDouble",
        "alias": "Total_Kilometers"
      },
      {
        "name": "Total_Minutes",
        "type": "esriFieldTypeDouble",
        "alias": "Total_Minutes"
      },
      {
        "name": "Shape_Length",
        "type": "esriFieldTypeDouble",
        "alias": "Shape_Length"
      }
    ],
    "features": [
      {
        "attributes": {
          "OID": 1,
          "FacilityID": "3",
          "FacilityRank": 1,
          "Name": "Station 39 - Fire Incident",
          "IncidentCurbApproach": 2,
          "FacilityCurbApproach": 1,
          "IncidentID": "1",
          "Total_Miles": 0.6491655620477702,
          "Total_Kilometers": 1.0447307022882064,
          "Total_Minutes": 1.4172383469037848,
          "Shape_Length": 0.010797590608192222
        },
        "geometry": {
          "paths": [
            [
              [
                -122.45787965542172,
                37.74080213810822
              ],
              [
                -122.45748000030176,
                37.740979999727244
              ]
            ]
          ]
        }
      },
      {
        "attributes": {
          "OID": 2,
          "FacilityID": "1",
          "FacilityRank": 2,
          "Name": "Station 20 - Fire Incident",
          "IncidentCurbApproach": 1,
          "FacilityCurbApproach": 1,
          "IncidentID": "1",
          "Total_Miles": 0.5794746525076059,
          "Total_Kilometers": 0.9325740551652006,
          "Total_Minutes": 1.5610809309860056,
          "Shape_Length": 0.009809811689090443
        },
        "geometry": {
          "paths": [
            [
              [
                -122.45596098061475,
                37.75135883264409
              ],
              [
                -122.45440000035967,
                37.75123999982617
              ],
            ]
          ]
        }
      }
    ],
    "exceededTransferLimit": false
  }
}

Output_Directions

This provides access to the turn-by-turn directions for each resulting route.

The directions_language, directions_distance_units, and directions_style_name parameters highly influence the driving directions. The features are empty if the populate_directions parameter is false.

The following table lists the fields that are returned for output directions:

FieldDescription

RouteName

The name of the route to which the driving action applies. This value is the same as the Name field of the output routes.

ArriveTime

The time of day to initiate the given driving action. If the route spans multiple days, the date and time of day are displayed.

Type

The type of maneuver that the directions feature represents or the type of the directions text. To determine whether Type refers to a maneuver type or a directions string type, check the value of the SubItemType field.

Type can be used, for example, to assign an icon for direction text based on the maneuver type, or it can use a formatting style based on the directions string type when displaying the driving directions in your application.

The Type value is an integer from the Maneuver Types or Directions String Types lists below.

Maneuver Types

  • 0: Unknown
  • 1: Arrive at Stop
  • 2: Go straight
  • 3: Bear left
  • 4: Bear right
  • 5: Turn left
  • 6: Turn right
  • 7: Make sharp left
  • 8: Make sharp right
  • 9: Make U-turn
  • 10: Take ferry
  • 11: Take roundabout
  • 12: Merge to highway
  • 13: Exit highway
  • 14: Go on another highway
  • 15: At fork keep center
  • 16: At fork keep left
  • 17: At fork keep right
  • 18: Depart stop
  • 19: Trip planning item
  • 20: End of ferry
  • 21: Ramp right
  • 22: Ramp left
  • 23: Turn left and immediately turn right
  • 24: Turn right and immediately turn left
  • 25: Turn right and immediately turn right
  • 26: Turn left and immediately turn left

Directions String Types

  • 0: General directions string type
  • 1: Depart directions string type
  • 2: Arrive directions string type
  • 3: Length directions string type
  • 4: Time directions string type
  • 5: Time summary directions string type
  • 6: Time Window directions string type
  • 7: Violation Time directions string type
  • 8: Wait Time directions string type
  • 9: Service Time directions string type
  • 10: Estimated Arrival Time directions string type
  • 11: Cumulative Length directions string type
  • 12: Street name directions string type
  • 13: Alternate street name directions string type
  • 14: Sign branch information directions string type
  • 15: Sign toward information directions string type
  • 16: Cross street name directions string type
  • 17: Sign exit number directions string type

SubItemType

Specifies whether the Type field refers to an integer from the Directions String Types table or the Maneuver Types table.

  • If the SubItemType value is 1, the Type refers to the values from the Maneuver Types table.
  • If the SubItemType value is 2, the Type refers to the values from the Directions String Types table.

Text

A text description of the travel directions.

ElaspsedTime

The time elapsed in minutes from when the current driving direction starts until the next one starts, or until the route ends for the last driving direction.

DriveDistance

The distance from where the current driving direction occurs to where the next one occurs, or to where the route ends for the last driving direction.

The value is in the units specified by the Directions_Distance_Units parameter.

This value is zero for driving directions that occur at the same location where the next one begins. For example, the DriveDistance is 0 for the directions text at the start of the route.

Syntax example for output_directions

The output_directions parameter is returned as a JSON feature set with following syntax:

Caution:

The service can only return a maximum of 1,000,000 features with the output_directions parameter. If this limit is exceeded, the exceededTransferLimit property is set to true.

{
  "paramName": "Output_Directions",
  "dataType": "GPFeatureRecordSetLayer",
  "value": {
    "displayFieldName": "",
    "geometryType": "esriGeometryPolyline",
    "spatialReference": {
      "wkid": <wkid>,
      "latestWkid": <wkid>,
    },
    "fields": [
      {
        "name": "<field1Name>",
        "type": "<field1Type>",
        "alias": "<field1Alias>",
        "length": "<field1Length>" //length is included only for esriFieldTypeString
      },
      {
        "name": "<field2Name>",
        "type": "<field2Type>",
        "alias": "<field2Alias>",
        "length": "<field2Length>"
      }
    ],
    "features": [
      {
        "geometry": {
          "paths": [
            [
              [
                <x11>,
                <y11>
              ],
              [
                <x12>,
                <y12>
              ]
            ],
            [
              [
                <x21>,
                <y21>
              ],
              [
                <x22>,
                <y22>
              ]
            ]
          ]
        },
        "attributes": {
          "<field1>": <value11>,
          "<field2>": <value12>
        }
      },
      {
        "geometry": {
          "paths": [
            [
              [
                <x11>,
                <y11>
              ],
              [
                <x12>,
                <y12>
              ]
            ],
            [
              [
                <x21>,
                <y21>
              ],
              [
                <x22>,
                <y22>
              ]
            ]
          ]
        },
        "attributes": {
          "<field1>": <value21>,
          "<field2>": <value22>
        }
      }
    ],
    "exceededTransferLimit": <true|false>
  }
}

Example for output_directions

The following shows an example of the output_directions parameter:

Note:

Because the response is quite verbose, the repeated elements within the response are abbreviated for clarity.

{
  "paramName": "Output_Directions",
  "dataType": "GPFeatureRecordSetLayer",
  "value": {
    "displayFieldName": "",
    "geometryType": "esriGeometryPolyline",
    "spatialReference": {
      "wkid": 4326,
      "latestWkid": 4326
    },
    "fields": [
      {
        "name": "ObjectID",
        "type": "esriFieldTypeOID",
        "alias": "ObjectID"
      },
      {
        "name": "RouteName",
        "type": "esriFieldTypeString",
        "alias": "RouteName",
        "length": 128
      },
      {
        "name": "ArriveTime",
        "type": "esriFieldTypeDate",
        "alias": "ArriveTime",
        "length": 16
      },
      {
        "name": "Type",
        "type": "esriFieldTypeSmallInteger",
        "alias": "Type"
      },
      {
        "name": "SubItemType",
        "type": "esriFieldTypeSmallInteger",
        "alias": "SubItemType"
      },
      {
        "name": "Text",
        "type": "esriFieldTypeString",
        "alias": "Text",
        "length": 255
      },
      {
        "name": "ElapsedTime",
        "type": "esriFieldTypeSingle",
        "alias": "ElapsedTime"
      },
      {
        "name": "DriveDistance",
        "type": "esriFieldTypeSingle",
        "alias": "DriveDistance"
      },
      {
        "name": "Shape_Length",
        "type": "esriFieldTypeDouble",
        "alias": "Shape_Length"
      }
    ],
    "features": [
      {
        "attributes": {
          "ObjectID": 1,
          "RouteName": "Station 39 - Fire Incident",
          "ArriveTime": 1365637673000,
          "Type": 18,
          "SubItemType": 1,
          "Text": "Start at Station 39",
          "ElapsedTime": 0,
          "DriveDistance": 0,
          "Shape_Length": 0
        }
      },
      {
        "attributes": {
          "ObjectID": 2,
          "RouteName": "Station 39 - Fire Incident",
          "ArriveTime": 1365637673000,
          "Type": 2,
          "SubItemType": 1,
          "Text": "Go northeast on PORTOLA DR toward REX AVE",
          "ElapsedTime": 1.044524,
          "DriveDistance": 0.5254771,
          "Shape_Length": 0.008828940635196278
        },
        "geometry": {
          "paths": [
            [
              [
                -122.45787965542172,
                37.74080213810822
              ],
              [
                -122.45748000030176,
                37.740979999727244
              ]
            ]
          ]
        }
      },
      {
        "attributes": {
          "ObjectID": 5,
          "RouteName": "Station 39 - Fire Incident",
          "ArriveTime": 1365637758034,
          "Type": 1,
          "SubItemType": 1,
          "Text": "Finish at Fire Incident",
          "ElapsedTime": 0,
          "DriveDistance": 0,
          "Shape_Length": 0
        }
      },
      {
        "attributes": {
          "ObjectID": 6,
          "RouteName": "Station 20 - Fire Incident",
          "ArriveTime": 1365637673000,
          "Type": 18,
          "SubItemType": 1,
          "Text": "Start at Station 20",
          "ElapsedTime": 0,
          "DriveDistance": 0,
          "Shape_Length": 0
        }
      },
      {
        "attributes": {
          "ObjectID": 7,
          "RouteName": "Station 20 - Fire Incident",
          "ArriveTime": 1365637673000,
          "Type": 2,
          "SubItemType": 1,
          "Text": "Go east on OLYMPIA WAY toward DELLBROOK AVE",
          "ElapsedTime": 0.5452001,
          "DriveDistance": 0.2105566,
          "Shape_Length": 0.003820738935246935
        },
        "geometry": {
          "paths": [
            [
              [
                -122.45596098061475,
                37.75135883264409
              ],
              [
                -122.45516999989553,
                37.75133999994108
              ]
            ]
          ]
        }
      },
      {
        "attributes": {
          "ObjectID": 9,
          "RouteName": "Station 20 - Fire Incident",
          "ArriveTime": 1365637766665,
          "Type": 1,
          "SubItemType": 1,
          "Text": "Finish at Fire Incident",
          "ElapsedTime": 0,
          "DriveDistance": 0,
          "Shape_Length": 0
        }
      }
    ],
    "exceededTransferLimit": false
  }
}

solve_succeeded

Use this parameter to determine if the service found the routes successfully. The error messages for the failure can be obtained by making a request to get the status of the job.

The solve_succeeded parameter is returned as a JSON feature set with the following syntax:

{
  "paramName": "Solve_Succeeded",
  "dataType": "GPBoolean",
  "value": <true | false>
}

The following shows an example of the solve_succeeded parameter:

{
  "paramName": "Solve_Succeeded",
  "dataType": "GPBoolean",
  "value": true
}

Example usage

The Closest Facility service supports synchronous and asynchronous execution modes. Synchronous and asynchronous modes define how the application interacts with the service and gets the results.

The request URL and the parameter names supported by the service when using synchronous execution are different and described on the Closest Facility Service with synchronous execution page.

Caution:

The maximum time an application can use the Closest Facility service when using the asynchronous execution mode is 1 hour (3,600 seconds) by default. If your request does not complete within this time limit, it will time out and return a failure. You can increase this timeout by modifying the The maximum time a client can use a service property using ArcGIS Server Manager.

When using the asynchronous execution mode, the request is of the following form:

https://<gpservice-url>/FindClosestFacility/submitJob?parameters
Note:

See Implementing App Login for ArcGIS Online or Acquire ArcGIS tokens for ArcGIS Enterprise to learn how to generate a token.

Finding the closest fire stations

In this example, you will find the two fire stations that can provide the quickest response to a fire at a given address. You will also generate routes and driving directions for the firefighters.

All the fire stations in the neighborhood are specified as the facilities parameter, and the location of the fire is specified as the incidents parameter. To include the name of the fire station in the driving directions, specify the name as the attribute of the facilities. For facilities and incidents, the geometries are in the spatial reference of the network dataset, WGS84. So the spatialReference property is not required.

Because you want to model the fire engines traveling from the stations to the location of the fire, you specify Facility to Incident as the value for the travel_direction parameter. You need to find the two closest fire stations within three minutes of the fire, so specify 2 as the value for the number_of_facilities_to_find parameter and 3 as the value for the cutoff parameter. You need to calculate the best routes that account for the current traffic conditions, so specify the current time as the time_of_day parameter and specify Start Time as the time_of_day_usage parameter.

Request example

The first request is to submit a job that returns the job ID.

https://<gpservice-url>/FindClosestFacilities/submitJob?incidents={"features":[{"geometry":{"x":-122.449614,"y":37.746712},"attributes":{"Name":"Fire Incident"}}]}&facilities={"features":[{"geometry":{"x":-122.455962,"y":37.751316},"attributes":{"Name":"Station 20"}},{"geometry":{"x":-122.440825,"y":37.753199},"attributes":{"Name":"Station 24"}},{"geometry":{"x":-122.457844,"y":37.740713},"attributes":{"Name":"Station 39"}}]}&travel_direction=Facility to Incident&number_of_facilities_to_find=2&cutoff=3&time_of_day=1365637673000&time_of_day_usage=Start Time&populate_directions=true&f=json&token=<yourToken>

JSON Response example

{
  "jobId": "j4459787f65404b439dac83a70d042e98",
  "jobStatus": "esriJobSubmitted"
}

Query job status

The job ID obtained from the response of the first request can be queried periodically to determine the status of the job.

Request to query job status

https://<gpservice-url>/FindClosestFacilities/jobs/<yourJobID>?returnMessages=true&f=json&token=<yourToken>

JSON Response example

{
  "jobId": "j4459787f65404b439dac83a70d042e98",
  "jobStatus": "esriJobSucceeded",
  "results": {
    "Output_Routes": {
      "paramUrl": "results/Output_Routes"
    },
    "Output_Directions": {
      "paramUrl": "results/Output_Directions"
    },
    "Solve_Succeeded": {
      "paramUrl": "results/Solve_Succeeded"
    },
    "Output_Closest_Facilities": {
      "paramUrl": "results/Output_Closest_Facilities"
    }
  },
  "inputs": {
    "Incidents": {
      "paramUrl": "inputs/Incidents"
    },
    "Facilities": {
      "paramUrl": "inputs/Facilities"
    },
    "Measurement_Units": {
      "paramUrl": "inputs/Measurement_Units"
    },
    "Analysis_Region": {
      "paramUrl": "inputs/Analysis_Region"
    },
    "Number_of_Facilities_to_Find": {
      "paramUrl": "inputs/Number_of_Facilities_to_Find"
    },
    "Cutoff": {
      "paramUrl": "inputs/Cutoff"
    },
    "Travel_Direction": {
      "paramUrl": "inputs/Travel_Direction"
    },
    "Use_Hierarchy": {
      "paramUrl": "inputs/Use_Hierarchy"
    },
    "Time_of_Day": {
      "paramUrl": "inputs/Time_of_Day"
    },
    "Time_of_Day_Usage": {
      "paramUrl": "inputs/Time_of_Day_Usage"
    },
    "UTurn_at_Junctions": {
      "paramUrl": "inputs/UTurn_at_Junctions"
    },
    "Point_Barriers": {
      "paramUrl": "inputs/Point_Barriers"
    },
    "Line_Barriers": {
      "paramUrl": "inputs/Line_Barriers"
    },
    "Polygon_Barriers": {
      "paramUrl": "inputs/Polygon_Barriers"
    },
    "Restrictions": {
      "paramUrl": "inputs/Restrictions"
    },
    "Attribute_Parameter_Values": {
      "paramUrl": "inputs/Attribute_Parameter_Values"
    },
    "Route_Shape": {
      "paramUrl": "inputs/Route_Shape"
    },
    "Route_Line_Simplification_Tolerance": {
      "paramUrl": "inputs/Route_Line_Simplification_Tolerance"
    },
    "Populate_Directions": {
      "paramUrl": "inputs/Populate_Directions"
    },
    "Directions_Language": {
      "paramUrl": "inputs/Directions_Language"
    },
    "Directions_Distance_Units": {
      "paramUrl": "inputs/Directions_Distance_Units"
    },
    "Directions_Style_Name": {
      "paramUrl": "inputs/Directions_Style_Name"
    }
  },
  "messages": []
}

Return output closest facilities

Because the job succeeded, a request can be made to return the facilities that are closest to the incidents. The output parameter used to retrieve these results is output_closest_facilities.

Request to return closest facilities

https://<gpservice-url>/FindClosestFacilities/jobs/<yourJobID>/results/output_closest_facilities?returnMessages=true&f=json&token=<yourToken>

JSON Response example

{
  "paramName": "Output_Closest_Facilities",
  "dataType": "GPFeatureRecordSetLayer",
  "value": {
    "displayFieldName": "",
    "geometryType": "esriGeometryPoint",
    "spatialReference": {
      "wkid": 4326,
      "latestWkid": 4326
    },
    "fields": [
      {
        "name": "OID",
        "type": "esriFieldTypeOID",
        "alias": "OID"
      },
      {
        "name": "Name",
        "type": "esriFieldTypeString",
        "alias": "Name",
        "length": 50
      },
      {
        "name": "ID",
        "type": "esriFieldTypeString",
        "alias": "ID",
        "length": 50
      },
      {
        "name": "AdditionalTime",
        "type": "esriFieldTypeDouble",
        "alias": "Additional Time"
      },
      {
        "name": "AdditionalDistance",
        "type": "esriFieldTypeDouble",
        "alias": "Additional Distance"
      },
      {
        "name": "CurbApproach",
        "type": "esriFieldTypeSmallInteger",
        "alias": "Curb Approach"
      },
      {
        "name": "ORIG_FID",
        "type": "esriFieldTypeSmallInteger",
        "alias": "ORIG_FID"
      }
    ],
    "features": [
      {
        "attributes": {
          "OID": 1,
          "Name": "Station 20",
          "ID": null,
          "AdditionalTime": 0,
          "AdditionalDistance": 0,
          "CurbApproach": 0,
          "ORIG_FID": 1
        },
        "geometry": {
          "x": -122.45596200044594,
          "y": 37.75131599973366
        }
      },
      {
        "attributes": {
          "OID": 2,
          "Name": "Station 39",
          "ID": null,
          "AdditionalTime": 0,
          "AdditionalDistance": 0,
          "CurbApproach": 0,
          "ORIG_FID": 3
        },
        "geometry": {
          "x": -122.45784400000059,
          "y": 37.74071300000497
        }
      }
    ],
    "exceededTransferLimit": false
  }
}

Return output routes

Because the job succeeded, a request can be made to return the routes from the output_routes output parameter.

Request to return output routes

https://<gpservice-url>/FindClosestFacilities/jobs/<yourJobID>/results/output_routes?returnMessages=true&f=json&token=<yourToken>

JSON Response example

Note that output_routes includes routes from two of the three fire stations to the fire incident since the two fire stations are closest to the fire incident based on the travel time. The name of the fire station and the incident name are used to construct the Name attribute for each route.

Note:

Because the response is quite verbose, the repeated elements within the response are abbreviated for clarity.

{
  "paramName": "Output_Routes",
  "dataType": "GPFeatureRecordSetLayer",
  "value": {
    "displayFieldName": "",
    "geometryType": "esriGeometryPolyline",
    "spatialReference": {
      "wkid": 4326,
      "latestWkid": 4326
    },
    "fields": [
      {
        "name": "OID",
        "type": "esriFieldTypeOID",
        "alias": "OID"
      },
      {
        "name": "FacilityID",
        "type": "esriFieldTypeString",
        "alias": "FacilityID",
        "length": 50
      },
      {
        "name": "FacilityRank",
        "type": "esriFieldTypeInteger",
        "alias": "FacilityRank"
      },
      {
        "name": "Name",
        "type": "esriFieldTypeString",
        "alias": "Name",
        "length": 128
      },
      {
        "name": "IncidentCurbApproach",
        "type": "esriFieldTypeInteger",
        "alias": "IncidentCurbApproach"
      },
      {
        "name": "FacilityCurbApproach",
        "type": "esriFieldTypeInteger",
        "alias": "FacilityCurbApproach"
      },
      {
        "name": "IncidentID",
        "type": "esriFieldTypeString",
        "alias": "IncidentID",
        "length": 50
      },
      {
        "name": "Total_Minutes",
        "type": "esriFieldTypeDouble",
        "alias": "Total_Minutes"
      },
      {
        "name": "Total_Miles",
        "type": "esriFieldTypeDouble",
        "alias": "Total_Miles"
      },
      {
        "name": "FacilityOID",
        "type": "esriFieldTypeInteger",
        "alias": "FacilityOID"
      },
      {
        "name": "IncidentOID",
        "type": "esriFieldTypeInteger",
        "alias": "IncidentOID"
      },
      {
        "name": "Total_Kilometers",
        "type": "esriFieldTypeDouble",
        "alias": "Total_Kilometers"
      },
      {
        "name": "Shape_Length",
        "type": "esriFieldTypeDouble",
        "alias": "Shape_Length"
      }
    ],
    "features": [
      {
        "attributes": {
          "OID": 1,
          "FacilityID": "1",
          "FacilityRank": 1,
          "Name": "Station 20 - Fire Incident",
          "IncidentCurbApproach": 1,
          "FacilityCurbApproach": 1,
          "IncidentID": "1",
          "Total_Minutes": 1.4635369356153203,
          "Total_Miles": 0.5767923258767018,
          "FacilityOID": 1,
          "IncidentOID": 1,
          "Total_Kilometers": 0.92826,
          "Shape_Length": 0.009809810977047043
        },
        "geometry": {
          "paths": [
            [
              [
                -122.45596097999999,
                37.75135883300004
              ],
              [
                -122.45439999999996,
                37.75124000000005
              ]                         
            ]
          ]
        }
      },
      {
        "attributes": {
          "OID": 2,
          "FacilityID": "3",
          "FacilityRank": 2,
          "Name": "Station 39 - Fire Incident",
          "IncidentCurbApproach": 2,
          "FacilityCurbApproach": 1,
          "IncidentID": "1",
          "Total_Minutes": 1.738154678946342,
          "Total_Miles": 0.6440599460986813,
          "FacilityOID": 3,
          "IncidentOID": 1,
          "Total_Kilometers": 1.03651,
          "Shape_Length": 0.010791093352716757
        },
        "geometry": {
          "paths": [
            [
              [
                -122.45787965499994,
                37.74080213800005
              ],
              [
                -122.45747999999998,
                37.740980000000036
              ]			
            ]
          ]
        }
      }
    ],
    "exceededTransferLimit": false
  }
}

Return output directions

Because the job succeeded, a request can be made to return the driving directions between the two closest fire stations and the fire incident from the output_directions output parameter.

Request to return output directions

https://<gpservice-url>/FindClosestFacilities/jobs/<yourJobID>/results/output_directions?returnMessages=true&f=json&token=<yourToken>

JSON Response example

The output directions include the driving directions as well as the geometry for the directions feature. Note that for each route, the first directions feature only includes the attributes property that contains the directions text. The subsequent directions features include the geometry property that is derived from the underlying streets included in the route along with the attributes property. The name of the fire stations and the incident are used in the driving directions.

Note:

Because the response is quite verbose, the repeated elements within the response are abbreviated for clarity.

{
  "paramName": "Output_Directions",
  "dataType": "GPFeatureRecordSetLayer",
  "value": {
    "displayFieldName": "",
    "geometryType": "esriGeometryPolyline",
    "spatialReference": {
      "wkid": 4326,
      "latestWkid": 4326
    },
    "fields": [
      {
        "name": "ObjectID",
        "type": "esriFieldTypeOID",
        "alias": "ObjectID"
      },
      {
        "name": "RouteName",
        "type": "esriFieldTypeString",
        "alias": "RouteName",
        "length": 128
      },
      {
        "name": "ArriveTime",
        "type": "esriFieldTypeDate",
        "alias": "ArriveTime",
        "length": 16
      },
      {
        "name": "Type",
        "type": "esriFieldTypeSmallInteger",
        "alias": "Type"
      },
      {
        "name": "SubItemType",
        "type": "esriFieldTypeSmallInteger",
        "alias": "SubItemType"
      },
      {
        "name": "Text",
        "type": "esriFieldTypeString",
        "alias": "Text",
        "length": 255
      },
      {
        "name": "ElapsedTime",
        "type": "esriFieldTypeSingle",
        "alias": "ElapsedTime"
      },
      {
        "name": "DriveDistance",
        "type": "esriFieldTypeSingle",
        "alias": "DriveDistance"
      },
      {
        "name": "Shape_Length",
        "type": "esriFieldTypeDouble",
        "alias": "Shape_Length"
      }
    ],
    "features": [
      {
        "attributes": {
          "ObjectID": 1,
          "RouteName": "Station 20 - Fire Incident",
          "ArriveTime": 1365637673000,
          "Type": 18,
          "SubItemType": 1,
          "Text": "Start at Station 20",
          "ElapsedTime": 0,
          "DriveDistance": 0,
          "Shape_Length": 0
        }
      },
      {
        "attributes": {
          "ObjectID": 2,
          "RouteName": "Station 20 - Fire Incident",
          "ArriveTime": 1365637673000,
          "Type": 2,
          "SubItemType": 1,
          "Text": "Go east on Olympia Way toward Dellbrook Ave",
          "ElapsedTime": 0.5476729,
          "DriveDistance": 0.2098574,
          "Shape_Length": 0.0038207383571576604
        },
        "geometry": {
          "paths": [
            [
              [
                -122.45596097999999,
                37.75135883300004
              ],
              [
                -122.45516999999995,
                37.75134000000003
              ]
            ]
          ]
        }
      },
      {
        "attributes": {
          "ObjectID": 4,
          "RouteName": "Station 20 - Fire Incident",
          "ArriveTime": 1365637760812,
          "Type": 1,
          "SubItemType": 1,
          "Text": "Finish at Fire Incident",
          "ElapsedTime": 0,
          "DriveDistance": 0,
          "Shape_Length": 0
        }
      },
      {
        "attributes": {
          "ObjectID": 5,
          "RouteName": "Station 39 - Fire Incident",
          "ArriveTime": 1365637673000,
          "Type": 18,
          "SubItemType": 1,
          "Text": "Start at Station 39",
          "ElapsedTime": 0,
          "DriveDistance": 0,
          "Shape_Length": 0
        }
      },
      {
        "attributes": {
          "ObjectID": 6,
          "RouteName": "Station 39 - Fire Incident",
          "ArriveTime": 1365637673000,
          "Type": 2,
          "SubItemType": 1,
          "Text": "Go northeast on Portola Dr toward Rex Ave",
          "ElapsedTime": 1.350187,
          "DriveDistance": 0.5206896,
          "Shape_Length": 0.008828940334549
        },
        "geometry": {
          "paths": [
            [
              [
                -122.45787965499994,
                37.74080213800005
              ],
              [
                -122.45747999999998,
                37.740980000000036
              ]
            ]
          ]
        }
      },
      {
        "attributes": {
          "ObjectID": 9,
          "RouteName": "Station 39 - Fire Incident",
          "ArriveTime": 1365637777289,
          "Type": 1,
          "SubItemType": 1,
          "Text": "Finish at Fire Incident",
          "ElapsedTime": 0,
          "DriveDistance": 0,
          "Shape_Length": 0
        }
      }
    ],
    "exceededTransferLimit": false
  }
}

JSON Response syntax

When you submit a request, the service assigns a unique job ID for the transaction. The job ID and the status of the job are returned in the response.

{
  "jobId": <jobID>,
  "jobStatus": <jobStatus>
}

The jobStatus property can have the following values:

  • esriJobSubmitted
  • esriJobWaiting
  • esriJobExecuting
  • esriJobSucceeded
  • esriJobFailed
  • esriJobTimedOut
  • esriJobCancelling
  • esriJobCancelled

Job execution

You can use the job ID to periodically check the status of the job and messages. Additionally, if the job has successfully completed, you can use the job ID to retrieve the results or even the inputs. The job information and results remain available for 24 hours after the job is finished.

After the initial request is submitted, you can make a request of the following form to get the status of the job:

https://<gpservice-url>/FindClosestFacilities/jobs/<yourJobID>?token=<yourToken>&returnMessages=true&f=json

Below is a sample JSON syntax returned using the above URL:

{
  "jobId": "<jobId>",
  "jobStatus": "<jobStatus>",
  "messages": [
    {
      "type": "<type1>",
      "description": "<description1>"
    },
    {
      "type": "<type2>",
      "description": "<description2>"
    }
  ]
}

While a job is executing, you can cancel it by making a request of the following form:

https://<gpservice-url>/FindClosestFacilities/jobs/<yourJobID>/cancel?token=<yourToken>&f=json
Note:

When you submit your request, if the service is busy processing other requests, the job will wait in the queue. The job status will be reported as esriJobSubmitted. If your application cannot wait for the entire duration while the job is in the queue, you can cancel the request and submit it at a later time. A canceled request will not incur any service credits. However, if your application did not cancel the request, it will eventually execute and will incur service credits regardless of whether your application retrieved the results or ignored them. Therefore, your application should always cancel the request if required.

Job completion

After the successful completion of the job, you can make a request of the following form to retrieve the outputs. Refer to the Output parameters section for more information on how to interpret the solution provided by the service.

https://<gpservice-url>/FindClosestFacilities/jobs/<yourJobID>/results/<output_parameter_name>?token=<yourToken>&f=json

You can also retrieve the value for any input parameter by making the requests of the following form:

https://<gpservice-url>/FindClosestFacilities/jobs/<yourJobID>/inputs/<inputParameterName>?token=<yourToken>&f=json

Usage limits

The table below lists the limits that apply to this service.

Limit ValueLimit Description

12.42 miles (20 kilometers)

Maximum snap tolerance:

(If the distance between an input point and its nearest traversable street is greater than the distance specified here, the point is excluded from the analysis.)

1,000,000

Maximum number of directions features that can be returned:

1 hour (3,600 seconds)

Maximum time a client can use the asynchronous closest facility service: