BufferParameters | API Reference | ArcGIS Maps SDK for JavaScript 4.31

Sets the distances, units, and other parameters for the buffer() method on the geometryService.

See also

Constructors

BufferParameters Constructor new BufferParameters(properties)

Parameter

properties Object

optional

See the properties for a list of all the properties that may be passed into the constructor.

Property Overview

Any properties can be set, retrieved or listened to. See the Watch for changes topic.

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Type	Summary	Class
SpatialReference	The spatial reference in which the geometries are buffered.	BufferParameters
String	The name of the class.	Accessor
Number []	The distances the input features are buffered.	BufferParameters
Boolean	If the input geometries are in a geographic coordinate system, set geodesic to `true` to generate a buffer polygon using a geodesic distance.	BufferParameters
Geometry []	The input geometries to buffer.	BufferParameters
SpatialReference	The spatial reference for the returned geometries.	BufferParameters
Boolean	If `true`, all geometries buffered at a given distance are unioned into a single (possibly multipart) polygon, and the unioned geometry is placed in the output array.	BufferParameters
String	The units for calculating each buffer distance.	BufferParameters

Property Details

bufferSpatialReference Property bufferSpatialReference SpatialReference

The spatial reference in which the geometries are buffered.

If bufferSpatialReference is not specified, the geometries are buffered in the spatial reference specified by outSpatialReference. If outSpatialReference is also not specified, they are buffered in the spatial reference of the features.

declaredClass Inherited Property declaredClass Stringreadonly Inherited from Accessor

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

distances Property distances Number[]

The distances the input features are buffered. The distance units are specified by unit.

geodesic Property geodesic Boolean

If the input geometries are in a geographic coordinate system, set geodesic to true to generate a buffer polygon using a geodesic distance. The bufferSpatialReference property is ignored when geodesic is set to true. Requires ArcGIS Server 10.1 or greater geometry service. For more information, see the ArcGIS REST API documentation on the GeometryService buffer operation and the geodesic property.

geometries Property geometries Geometry[]

The input geometries to buffer.

outSpatialReference Property outSpatialReference SpatialReference

The spatial reference for the returned geometries.

If outSpatialReference is not specified, the output geometries are in the spatial reference specified by bufferSpatialReference. If bufferSpatialReference also is not specified, they are in the spatial reference of the features.

unionResults Property unionResults Boolean

If true, all geometries buffered at a given distance are unioned into a single (possibly multipart) polygon, and the unioned geometry is placed in the output array.

unit Property unit String

The units for calculating each buffer distance. If unit is not specified, the units are derived from bufferSpatialReference. If bufferSpatialReference is not specified, the units are derived from the features.

For a list of valid units, see esriSRUnitType Constants and esriSRUnit2Type Constants.

Method Overview

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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.	BufferParameters
Boolean	Returns true if a named group of handles exist.	Accessor
	Removes a group of handles owned by the object.	Accessor
Object	Converts an instance of this class to its ArcGIS portal JSON representation.	BufferParameters

Method Details

addHandles Inherited Method addHandles(handleOrHandles, groupKey) Inherited from Accessor Since: ArcGIS Maps SDK for JavaScript 4.25 Accessor 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();

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.

fromJSON Method fromJSON(json){*}static

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 json parameter 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.

Parameter

json Object

A 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.

Returns

Type	Description
*	Returns a new instance of this class.

hasHandles Inherited Method hasHandles(groupKey){Boolean} Inherited from Accessor Since: ArcGIS Maps SDK for JavaScript 4.25 Accessor since 4.0, hasHandles added at 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 Inherited Method removeHandles(groupKey) Inherited from Accessor Since: ArcGIS Maps SDK for JavaScript 4.25 Accessor since 4.0, removeHandles added at 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");

toJSON Method toJSON(){Object}

Converts an instance of this class to its ArcGIS portal JSON representation. See the Using fromJSON() guide topic for more information.

Returns

Type	Description
Object	The ArcGIS portal JSON representation of an instance of this class.