ElevationProfileLineQuery

AMD: require(["esri/widgets/ElevationProfile/ElevationProfileLineQuery"], (ElevationProfileLineQuery) => { /* code goes here */ });
ESM: import ElevationProfileLineQuery from "@arcgis/core/widgets/ElevationProfile/ElevationProfileLineQuery";
Class: esri/widgets/ElevationProfile/ElevationProfileLineQuery
Inheritance: ElevationProfileLineQuery ElevationProfileLine Accessor
Since: ArcGIS API for JavaScript 4.18

Profile line which samples elevation from a custom elevation source, for example by creating a new ElevationLayer, or by using an elevation layer from ground.layers.

Additionally, you can create your own source object with a method called queryElevation, with the same signature as queryElevation.

See also
Example
const elevLayer = new ElevationLayer({
  url: "https://sampleserver6.arcgisonline.com/arcgis/rest/services/Elevation/MtBaldy_Elevation/ImageServer"
});
const elevationProfile = new ElevationProfile({
  view: view,
  profiles: [{
    type: "query", // autocasts as new ElevationProfileLineQuery(),
    source: elevLayer
  }]
});

Property Overview

Any properties can be set, retrieved or listened to. See the Working with Properties topic.
Show inherited properties Hide inherited properties
Name Type Summary Class
Color

Color of the line on the chart and in the view.

more details
ElevationProfileLineQuery
String

The name of the class.

more details
Accessor
Point

Point being hovered in the chart, in the view's spatial reference.

more details
ElevationProfileLine
String

Unique identifier for the profile line.

more details
ElevationProfileLine
Number

How far along the generation of this profile is.

more details
ElevationProfileLine
ElevationProfileSample[]

List of samples that make up the elevation profile.

more details
ElevationProfileLine
Object

Elevation source used to sample elevation when generating the profile, for example an ElevationLayer.

more details
ElevationProfileLineQuery
ElevationProfileStatistics

Statistics about the generated elevation profile, if available.

more details
ElevationProfileLine
String

Title of the line, to be displayed in the chart tooltip and in the chart legend.

more details
ElevationProfileLine
String

The line type.

more details
ElevationProfileLineQuery
Boolean

Whether a line visualization representing elevationSamples should be added to the SceneView.

more details
ElevationProfileLineQuery
Boolean

Whether the line should be computed and shown in the chart.

more details
ElevationProfileLine

Property Details

Autocasts from Object|Number[]|String

Color of the line on the chart and in the view.

Default Value:#db334a
declaredClass Stringreadonly inherited

The name of the class. The declared class name is formatted as esri.folder.className.

hoveredPoint Pointreadonly inherited

Point being hovered in the chart, in the view's spatial reference.

Unique identifier for the profile line.

progress Numberreadonly inherited

How far along the generation of this profile is. 0 means nothing was loaded and 1 means loading is complete.

List of samples that make up the elevation profile. It can be passed to a graphing library in order to display the profile in 2D.

source Object

Elevation source used to sample elevation when generating the profile, for example an ElevationLayer.

Property
queryElevation queryElevation

Function used to query elevation values for a geometry (Point, Multipoint or Polyline). It returns a promise that resolves with an ElevationQueryResult.

Example
const elevLayer = new ElevationLayer({
  url: "https://sampleserver6.arcgisonline.com/arcgis/rest/.../Elevation/ImageServer"
});

// profile line with elevation layer source
const elevationProfile = new ElevationProfile({
  view,
  profiles: [{
    type: "query", // autocasts as new ElevationProfileLineQuery(),
    source: elevLayer
  }]
});

// profile line with a source coming from an elevation
// layer with a specific sampling resolution
const elevationProfile = new ElevationProfile({
  view,
  profiles: [{
    type: "query",
    source: {
      queryElevation(geometry, options) {
        return elevLayer.queryElevation(geometry, { ...options, demResolution: 20 })
      }
    }
  }]
});

// profile line with a source that queries data
// on an elevation sampler
view.when(async() => {
  const sampler = await elevLayer.createElevationSampler(extent);
  const querySource = {
    queryElevation: async (geometry: Multipoint) => {
      return {
        geometry: await sampler.queryElevation(geometry),
        noDataValue: sampler.noDataValue
      };
    }
  };
  const elevationProfile = new ElevationProfile({
    view,
    profiles: [{
      type: "query",
      source: querySource
    }]
  });
});

Statistics about the generated elevation profile, if available. For slope computations profiles are sampled at a minimum sampling distance of 10m (32.8ft). Higher resolution profiles are downsampled to a 10m (32.8ft) sampling distance before the slope is calculated.

Title of the line, to be displayed in the chart tooltip and in the chart legend.

type Stringreadonly

The line type.

For ElevationProfileLineQuery the type is always "query".

viewVisualizationEnabled Boolean
Since: ArcGIS API for JavaScript 4.20

Whether a line visualization representing elevationSamples should be added to the SceneView. This property doesn't apply to MapView.

Default Value:true
visible Boolean inherited

Whether the line should be computed and shown in the chart.

Default Value:true

Method Overview

Show inherited methods Hide inherited methods
Name Return Type Summary Class

Adds one or more handles which are to be tied to the lifecycle of the object.

more details
Accessor
Boolean

Returns true if a named group of handles exist.

more details
Accessor

Removes a group of handles owned by the object.

more details
Accessor

Method Details

addHandles(handleOrHandles, groupKey)inherited
Since: ArcGIS API for JavaScript 4.25

Adds one or more handles which are to be tied to the lifecycle of the object. The handles will be removed when the object is destroyed.

// Manually manage handles
const handle = reactiveUtils.when(
  () => !view.updating,
  () => {
    wkidSelect.disabled = false;
  },
  { once: true }
);

// Handle gets removed when the object is destroyed.
this.addHandles(handle);
Parameters
handleOrHandles WatchHandle|WatchHandle[]

Handles marked for removal once the object is destroyed.

groupKey *
optional

Key identifying the group to which the handles should be added. All the handles in the group can later be removed with Accessor.removeHandles(). If no key is provided the handles are added to a default group.

hasHandles(groupKey){Boolean}inherited
Since: ArcGIS API for JavaScript 4.25

Returns true if a named group of handles exist.

Parameter
groupKey *
optional

A group key.

Returns
Type Description
Boolean Returns true if a named group of handles exist.
Example
// Remove a named group of handles if they exist.
if (obj.hasHandles("watch-view-updates")) {
  obj.removeHandles("watch-view-updates");
}
removeHandles(groupKey)inherited
Since: ArcGIS API for JavaScript 4.25

Removes a group of handles owned by the object.

Parameter
groupKey *
optional

A group key or an array or collection of group keys to remove.

Example
obj.removeHandles(); // removes handles from default group

obj.removeHandles("handle-group");
obj.removeHandles("other-handle-group");

Type Definitions

queryElevation(geometry, options){Promise<ElevationQueryResult>}

Function used to query elevation values for a geometry (Point, Multipoint or Polyline). It returns a promise that resolves with an ElevationQueryResult.

Parameters
Specification

The geometry to use for sampling elevation data.

options Object
optional

Additional query options. See the table below.

Specification
demResolution Number|String
optional
Default Value: auto

Controls the horizontal resolution (cell size) in meters from which elevation data is sampled (defaults to auto). See the table below for more details on the different settings.

demResolution Description
auto Automatically chooses an appropriate resolution for each coordinate of the input geometry. The current implementation will try to use the finest available resolution given that the total required number of tile requests does not exceed a certain maximum amount (currently 20). Note that this may result in values being sampled from different resolutions.
finest-contiguous Sample elevation from the finest available resolution (cell size) across the entire geometry.
{number} Sample elevation from the resolution closest to the specified resolution (in meters).
returnSampleInfo Boolean
optional
Default Value: false

Indicates whether to return additional sample information for each coordinate.

noDataValue Number
optional
Default Value: 0

The value to use when there is no data available.

signal AbortSignal
optional

An AbortSignal to abort the request. If canceled, the promise will be rejected with an error named AbortError. See also AbortController.

Returns
Type Description
Promise<ElevationQueryResult> Resolves to an object with the sampled geometry, resolution information, and no data value.

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