require(["esri/rest/support/LengthsParameters"], (LengthsParameters) => { /* code goes here */ });
import LengthsParameters from "@arcgis/core/rest/support/LengthsParameters.js";
esri/rest/support/LengthsParameters
Sets the length units and other parameters for the geometryService.lengths() operation.
Constructors
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Parameterproperties Objectoptional
See the properties for a list of all the properties that may be passed into the constructor.
Property Overview
| Name | Type | Summary | Class |
|---|---|---|---|
Defines the type of calculation for the geometry. | LengthsParameters | ||
The name of the class. | Accessor | ||
If polylines are in a geographic coordinate system, then geodesic needs to be set to | LengthsParameters | ||
The length unit in which perimeters of polygons will be calculated. | LengthsParameters | ||
The array of polylines whose lengths are to be computed. | LengthsParameters |
Property Details
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calculationType
PropertycalculationType String -
Defines the type of calculation for the geometry. The type can be one of the following:
Value Description planar Planar measurements use 2D Cartesian mathematics to calculate length. Use this type if the length needs to be calculated in the input spatial reference otherwise use preserve-shape.geodesic Use this type to calculate an area or length using only the vertices of the polygon to define the lines connecting the vertices as geodesic segments independent of the actual shape of the polygon. Note: a geodesic segment is the shortest path between two points on an ellipsoid. preserve-shape Calculate the area or length of the geometry on the surface of the Earth ellipsoid, for geometries defined in a projected or geographic coordinate system. This method preserves the shape of the geometry in its coordinate system which means the true area or length will be calculated for the geometry that is displayed on the map. Possible Values:"planar" |"geodesic" |"preserve-shape"
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geodesic
Propertygeodesic Boolean -
If polylines are in a geographic coordinate system, then geodesic needs to be set to
truein order to calculate the ellipsoidal shortest path distance between each pair of the vertices in the polylines. IflengthUnitis not specified, the output is returned in meters.
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The length unit in which perimeters of polygons will be calculated. For a list of valid units, see linear unit codes.
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The array of polylines whose lengths are to be computed. The structure of each polyline in the array is same as the structure of the JSON polyline objects returned by the ArcGIS REST API.
Method Overview
| Name | Return Type | Summary | Class |
|---|---|---|---|
Adds one or more handles which are to be tied to the lifecycle of the object. | Accessor | ||
* | Creates a new instance of this class and initializes it with values from a JSON object generated from an ArcGIS product. | LengthsParameters | |
Returns true if a named group of handles exist. | Accessor | ||
Removes a group of handles owned by the object. | Accessor | ||
Converts an instance of this class to its ArcGIS portal JSON representation. | LengthsParameters |
Method Details
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Inherited from Accessor
Since: ArcGIS Maps SDK for JavaScript 4.25Accessor since 4.0, addHandles added at 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 } ); this.addHandles(handle); // Destroy the object this.destroy();ParametershandleOrHandles WatchHandle|WatchHandle[]Handles marked for removal once the object is destroyed.
groupKey *optionalKey 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.
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Creates a new instance of this class and initializes it with values from a JSON object generated from an ArcGIS product. The object passed into the input
jsonparameter often comes from a response to a query operation in the REST API or a toJSON() method from another ArcGIS product. See the Using fromJSON() topic in the Guide for details and examples of when and how to use this function.Parameterjson ObjectA JSON representation of the instance in the ArcGIS format. See the ArcGIS REST API documentation for examples of the structure of various input JSON objects.
ReturnsType Description * Returns a new instance of this class.
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hasHandles
InheritedMethodhasHandles(groupKey){Boolean}Inherited from AccessorSince: ArcGIS Maps SDK for JavaScript 4.25Accessor since 4.0, hasHandles added at 4.25. -
Returns true if a named group of handles exist.
ParametergroupKey *optionalA group key.
ReturnsType Description Boolean Returns trueif 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"); }
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Inherited from Accessor
Since: ArcGIS Maps SDK for JavaScript 4.25Accessor since 4.0, removeHandles added at 4.25. -
Removes a group of handles owned by the object.
ParametergroupKey *optionalA group key or an array or collection of group keys to remove.
Exampleobj.removeHandles(); // removes handles from default group obj.removeHandles("handle-group"); obj.removeHandles("other-handle-group");
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toJSON
MethodtoJSON(){Object} -
Converts an instance of this class to its ArcGIS portal JSON representation. See the Using fromJSON() guide topic for more information.
ReturnsType Description Object The ArcGIS portal JSON representation of an instance of this class.