ImageSampleParameters | API Reference | ArcGIS Maps SDK for JavaScript 4.31

Input parameters for the getSamples() method on ImageryLayer.

See also

Property Overview

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

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Type	Summary	Class
String	The name of the class.	Accessor
Point\|Multipoint\|Polyline\|Extent\|Polygon	Input geometry that defines the locations to be sampled.	ImageSampleParameters
String	Defines how to interpolate pixel values.	ImageSampleParameters
Point []	When sampling multiple locations, you can use an array of points instead of providing a multipoint for the geometry property.	ImageSampleParameters
MosaicRule	Specifies the mosaic rule defining the image sort order and selection.	ImageSampleParameters
String []	The list of fields associated with the rasters to be included in the response.	ImageSampleParameters
Point	Specifies the pixel size (or the resolution) that will be used for the sampling.	ImageSampleParameters
Boolean	When `true`, returns the first valid pixel value that meets specified conditions at each sampling point location.	ImageSampleParameters
Number	Specifies the approximate number of locations to sample from the provided geometry when the input geometry is polyline, polygon or extent.	ImageSampleParameters
Number	Specifies the distance interval to sample points from the provided geometry when input geometry is polyline.	ImageSampleParameters
Number	Specifies the slice id of a multidimensional raster.	ImageSampleParameters
TimeExtent	The time extent for which to perform sampling.	ImageSampleParameters

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 |Multipoint |Polyline |Extent |Polygonautocast Autocasts from Object

Input geometry that defines the locations to be sampled. The geometry can be a point, multipoint, polyline, extent or a polygon.

The locations property can be used to set an array of points for convenience if the geometry is a multipoint. If you set the locations property, the array of points will be converted to a multipoint geometry at runtime.

interpolation Property interpolation String

Defines how to interpolate pixel values.

Possible Values:"nearest" |"bilinear" |"cubic" |"majority"

Default Value:"nearest"

locations Property locations Point[]

When sampling multiple locations, you can use an array of points instead of providing a multipoint for the geometry property. The array of points will be converted to a multipoint and used as the geometry at runtime. The first point's spatial reference is used in getSamples operation.

mosaicRule Property mosaicRule MosaicRuleautocast Autocasts from Object

Specifies the mosaic rule defining the image sort order and selection. When a mosaic rule is not specified, the current settings on the ImageryLayer will be used.

outFields Property outFields String[]

The list of fields associated with the rasters to be included in the response.

Default Value:null

pixelSize Property pixelSize Pointautocast Autocasts from Object

Specifies the pixel size (or the resolution) that will be used for the sampling. 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 this operation.

returnFirstValueOnly Property returnFirstValueOnly Boolean

When true, returns the first valid pixel value that meets specified conditions at each sampling point location. When false, all pixel values are returned.

Default Value:true

sampleCount Property sampleCount Number

Specifies the approximate number of locations to sample from the provided geometry when the input geometry is polyline, polygon or extent. Either sampleDistance or sampleCount is needed to perform densification on the input polyline to sample points. The unit of the geometry's spatial reference will be used for the densification.

sampleDistance Property sampleDistance Number

Specifies the distance interval to sample points from the provided geometry when input geometry is polyline. Either sampleDistance or sampleCount is needed to perform densification on the input polyline to sample points. The unit of the geometry's spatial reference will be used for the densification.

sliceId Property sliceId Number

Specifies the slice id of a multidimensional raster. This parameter is supported at ArcGIS Server 10.9 and later.

timeExtent Property timeExtent TimeExtentautocast Autocasts from Object

The time extent for which to perform sampling. This parameter is supported at ArcGIS Server 10.9 and later.

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.	ImageSampleParameters
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.	ImageSampleParameters

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.