ImagePointParameters | API Reference | ArcGIS Maps SDK for JavaScript 4.30

Input parameters used by the ImageryLayer.measurePointOrCentroid() or imageService.measurePointOrCentroid() methods to perform imagery point or centroid mensuration. The point mensuration determines the location of point-based geographic coordinates while the centroid mensuration determines the centroid of the area of interest for given geometry.

See also

Constructors

ImagePointParameters Constructor new ImagePointParameters(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 Working with Properties topic.

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Type	Summary	Class
String	The name of the class.	Accessor
Point\|Extent\|Polygon	Input geometry to determine a a point location or a centroid of a given area.	ImagePointParameters
Boolean	When `true`, this method calculates the z-value for the returned point geometry.	ImagePointParameters
MosaicRule	Specifies the mosaic rule on how individual images should be mosaicked when the measure is computed.	ImagePointParameters
PixelSize	Specifies the pixel size.	ImagePointParameters
String	The string value representing the type of imagery mensuration.	ImagePointParameters

Property Details

declaredClass Inherited Property declaredClass Stringreadonly Inherited from Accessor

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

geometry Property geometry Point |Extent |Polygon

Input geometry to determine a a point location or a centroid of a given area.

is3D Property is3D Boolean

When true, this method calculates the z-value for the returned point geometry. 3D calculation can only be done when the layer's capabilities.mensuration.supports3D returns true.

Default Value:false

mosaicRule Property mosaicRule MosaicRuleautocast Since: ArcGIS Maps SDK for JavaScript 4.27 ImagePointParameters since 4.26, mosaicRule added at 4.27.

Specifies the mosaic rule on how individual images should be mosaicked when the measure is computed. When a mosaic rule is not specified, the current settings on the ImageryLayer will be used.

pixelSize Property pixelSize PixelSizeautocast Since: ArcGIS Maps SDK for JavaScript 4.27 ImagePointParameters since 4.26, pixelSize added at 4.27.

Specifies the pixel size. If pixel size is not specified, pixelSize will default to the base resolution of the image service. The raster at the specified pixel size in the mosaic dataset will be used for the Measure calculation.

type Property type Stringreadonly

The string value representing the type of imagery mensuration.

For ImagePointParameters the type is always "point".

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.	ImagePointParameters
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.	ImagePointParameters

Method Details

addHandles Inherited Method addHandles(handleOrHandles, groupKey) Inherited from Accessor

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

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

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.