ImageIdentifyParameters

AMD: require(["esri/rest/support/ImageIdentifyParameters"], (ImageIdentifyParameters) => { /* code goes here */ });
ESM: import ImageIdentifyParameters from "@arcgis/core/rest/support/ImageIdentifyParameters";
Class: esri/rest/support/ImageIdentifyParameters
Inheritance: ImageIdentifyParameters Accessor
Since: ArcGIS API for JavaScript 4.20

Input parameters for imageService.

See also

Constructors

new ImageIdentifyParameters(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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Name Type Summary Class
String

The name of the class.

more details
Accessor
Point|Polygon

Input geometry that defines the location to be identified.

more details
ImageIdentifyParameters
Number

Controls the maximum number of returned catalog items, set to 1 to return the top most raster only.

more details
ImageIdentifyParameters
MosaicRule

Specifies the mosaic rules defining the image sorting order.

more details
ImageIdentifyParameters
PixelSize

Specifies the pixel level being identified on the x and y axis.

more details
ImageIdentifyParameters
Boolean

When true, the request is processed for all variables and dimensions.

more details
ImageIdentifyParameters
RasterFunction

Specifies the rendering rule for how the requested image should be rendered.

more details
ImageIdentifyParameters
RasterFunction

An array the rendering rules to retrieve multiple processed pixel values.

more details
ImageIdentifyParameters
Boolean

If true, returns both geometry and attributes of the catalog items.

more details
ImageIdentifyParameters
Boolean

When true, each feature in the catalog items includes the geometry.

more details
ImageIdentifyParameters
Boolean

If true, the pixel values of all raster catalog items under the requested geometry.

more details
ImageIdentifyParameters
TimeExtent

A time extent for a temporal data against time-aware imagery layer.

more details
ImageIdentifyParameters

Property Details

declaredClass Stringreadonly inherited

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

geometry Point|Polygon

Input geometry that defines the location to be identified. The location can be a point or a polygon.

maxItemCount Number

Controls the maximum number of returned catalog items, set to 1 to return the top most raster only.

mosaicRule MosaicRuleautocast

Specifies the mosaic rules defining the image sorting order. When a mosaic rule is not specified, center is used.

pixelSize PixelSizeautocast

Specifies the pixel level being identified on the x and y axis. Defaults to the base resolution of the dataset when not specified.

processAsMultidimensional Boolean
Since: ArcGIS API for JavaScript 4.23

When true, the request is processed for all variables and dimensions. Pixel values from all slices along with additional properties describing the slices, will be returned. When false, the request is processed for the first or selected slices only. It is only applicable when the service is multidimensional. This capability is only available with image services published with ArcGIS Server 10.9 or greater.

Default Value:false
renderingRule RasterFunctionautocast

Specifies the rendering rule for how the requested image should be rendered.

renderingRules RasterFunction

An array the rendering rules to retrieve multiple processed pixel values.

returnCatalogItems Boolean

If true, returns both geometry and attributes of the catalog items. Set to false when catalog items are not needed to significantly improve identify operation's performance.

returnGeometry Boolean

When true, each feature in the catalog items includes the geometry. When false, the features will not display on the map.

Default Value:false
returnPixelValues Boolean

If true, the pixel values of all raster catalog items under the requested geometry. Set to false when catalog item values are not needed to significantly improve identify operation's performance.

timeExtent TimeExtentautocast

A time extent for a temporal data against time-aware imagery layer. For example, it can be used to discover land cover changes by decade.

Method Overview

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Name Return Type Summary Class

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

more details
Accessor
*

Creates a new instance of this class and initializes it with values from a JSON object generated from an ArcGIS product.

more details
ImageIdentifyParameters
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
Object

Converts an instance of this class to its ArcGIS portal JSON representation.

more details
ImageIdentifyParameters

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.

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(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");
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.

Type Definitions

PixelSize Object

Specifies the pixel size (or the resolution). The raster at the specified pixel size in the mosaic dataset will be used for the the identify, histogram or statistics calculations on an ImageryLayer.

Properties
x Number

Represents the size of one pixel in map units along the x axis.

y Number

Represents the size of one pixel in map units along the y axis.

spatialReference Object
optional

Spatial reference to be used for the request. The spatial reference of the image service will be used if not specified.

Specification
wkid Number
optional

The wkid of the spatial reference.

wkt Number
optional

The Well known text or wkt of the spatial reference.

See also
Example
// set the pixel size parameter to match the current
// resolution of the view and spatial reference
let pixelSize = {
  x:view.resolution,
  y:view.resolution,
  spatialReference: {
    wkid: view.spatialReference.wkid
  }
}
// set the histogram parameters to request
// data for the current view extent and resolution
let params = new ImageHistogramParameters({
  geometry:  view.extent,
  pixelSize: pixelSize
});

// request for histograms for the specified parameters
layer.computeHistograms(params).then(function(results){
  // results are returned and process it as needed.
  console.log("histograms", results);
})
.catch(function(err){
  console.log("err", err)
});

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