Extent | API Reference | ArcGIS Maps SDK for JavaScript 4.30

The minimum and maximum X and Y coordinates of a bounding box. Extent is used to describe the visible portion of a MapView. When working in a SceneView, Camera is used to define the visible part of the map within the view.

See also

Constructors

Extent Constructor new Extent(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
Object	The cache is used to store values computed from geometries that need to be cleared or recomputed upon mutation.	Geometry
Point	The center point of the extent in map units.	Extent
String	The name of the class.	Accessor
Extent	The extent of the geometry.	Geometry
Boolean	Indicates if the geometry has M values.	Extent
Boolean	Indicates if the geometry has z-values (elevation).	Extent
Number	The height of the extent in map units (the distance between ymin and ymax).	Extent
Number	The maximum possible `m` value in an extent envelope.	Extent
Number	The minimum possible `m` value of an extent envelope.	Extent
SpatialReference	The spatial reference of the geometry.	Geometry
String	For Extent the type is always "extent".	Extent
Number	The width of the extent in map units (the distance between xmin and xmax).	Extent
Number	The maximum X-coordinate of an extent envelope.	Extent
Number	The minimum X-coordinate of an extent envelope.	Extent
Number	The maximum Y-coordinate of an extent envelope.	Extent
Number	The minimum Y-coordinate of an extent envelope.	Extent
Number	The maximum possible `z`, or elevation, value in an extent envelope.	Extent
Number	The minimum possible `z`, or elevation, value of an extent envelope.	Extent

Property Details

cache Inherited Property cache Objectreadonly Inherited from Geometry

The cache is used to store values computed from geometries that need to be cleared or recomputed upon mutation. An example is the extent of a polygon.

center Property center Pointreadonly

The center point of the extent in map units.

declaredClass Inherited Property declaredClass Stringreadonly Inherited from Accessor Since: ArcGIS Maps SDK for JavaScript 4.7 Accessor since 4.0, declaredClass added at 4.7.

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

extent Inherited Property extent Extentreadonly Inherited from Geometry

The extent of the geometry. For a point, the extent is null.

hasM Property hasM Booleanreadonly

Indicates if the geometry has M values.

hasZ Property hasZ Booleanreadonly

Indicates if the geometry has z-values (elevation).

Z-values defined in a geographic or metric coordinate system are expressed in meters. However, in local scenes that use a projected coordinate system, vertical units are assumed to be the same as the horizontal units specified by the service.

height Property height Numberreadonly

The height of the extent in map units (the distance between ymin and ymax).

mmax Property mmax Number

The maximum possible m value in an extent envelope.

Default Value:undefined

mmin Property mmin Number

The minimum possible m value of an extent envelope.

Default Value:undefined

spatialReference Inherited Property spatialReference SpatialReferenceautocast Inherited from Geometry

The spatial reference of the geometry.

Default Value:WGS84 (wkid: 4326)

type Property type Stringreadonly

For Extent the type is always "extent".

width Property width Numberreadonly

The width of the extent in map units (the distance between xmin and xmax).

xmax Property xmax Number

The maximum X-coordinate of an extent envelope.

Default Value:0

xmin Property xmin Number

The minimum X-coordinate of an extent envelope.

Default Value:0

ymax Property ymax Number

The maximum Y-coordinate of an extent envelope.

Default Value:0

ymin Property ymin Number

The minimum Y-coordinate of an extent envelope.

Default Value:0

zmax Property zmax Number

The maximum possible z, or elevation, value in an extent envelope.

Default Value:undefined

zmin Property zmin Number

The minimum possible z, or elevation, value of an extent envelope.

Default Value:undefined

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
Extent	Centers the extent to the specified Point.	Extent
Extent	Creates a deep clone of Extent object.	Extent
Boolean	Checks if the input geometry is contained within the extent.	Extent
Boolean	Indicates if the input extent is equal to the testing extent.	Extent
Extent	Expands the extent by the given factor.	Extent
*	Creates a new instance of this class and initializes it with values from a JSON object generated from an ArcGIS product.	Geometry
Boolean	Returns true if a named group of handles exist.	Accessor
Extent	Shrinks the original extent to the intersection with the input extent.	Extent
Boolean	Tests to validate if the input geometry intersects the extent and returns a Boolean value.	Extent
Extent []	Returns an array with either one Extent that's been shifted to within +/- 180 or two Extents if the original extent intersects the International Dateline.	Extent
Extent	Modifies the extent geometry in-place with X and Y offsets in map units.	Extent
	Removes a group of handles owned by the object.	Accessor
Object	Converts an instance of this class to its ArcGIS portal JSON representation.	Geometry
Extent	Expands the original extent to include the extent of the input Extent.	Extent

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.

centerAt Method centerAt(point){Extent}

Centers the extent to the specified Point. This method modifies the extent geometry in-place. You should clone the extent object before calling this method where appropriate.

Parameter

point Point

The point to center the extent.

Returns

Type	Description
Extent	The new extent with `point` as the center.

clone Method clone(){Extent}

Creates a deep clone of Extent object.

Returns

Type	Description
Extent	A new instance of a Extent object equal to the object used to call `.clone()`.

contains Method contains(geometry){Boolean}

Checks if the input geometry is contained within the extent.

Parameter

geometry Point|Extent

Input geometry to test if it is contained within the extent.

Returns

Type	Description
Boolean	Returns `true` if the input geometry is contained within the extent.

equals Method equals(extent){Boolean}

Indicates if the input extent is equal to the testing extent.

Parameter

extent Extent

Input extent.

Returns

Type	Description
Boolean	Returns `true` if the input extent is equal to the extent that calls `equals()`.

expand Method expand(factor){Extent}

Expands the extent by the given factor. For example, a value of 1.5 will expand the extent to be 50 percent larger than the original extent. This method modifies the extent geometry in-place. You should clone the extent object before calling this method where appropriate.

Parameter

factor Number

The multiplier value.

Returns

Type	Description
Extent	Returns the expanded extent.

fromJSON Inherited 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");
}

intersection Method intersection(extent){Extent}

Shrinks the original extent to the intersection with the input extent.

This method modifies the extent geometry in-place. You should clone the extent object before calling this method where appropriate. If the original extent and the input extent have no intersection, the extent is not modified and null is returned.

Parameter

extent Extent

The input extent to intersect.

Returns

Type	Description
Extent	The intersection of the input Extent with the original Extent or null.

intersects Method intersects(geometry){Boolean}

Tests to validate if the input geometry intersects the extent and returns a Boolean value.

Parameter

geometry Geometry

The geometry used to test the intersection. It can be a Point, Polyline, Polygon, Extent or Multipoint.

Returns

Type	Description
Boolean	Returns `true`, if the input geometry intersects the extent.

normalize Method normalize(){Extent[]}

Returns an array with either one Extent that's been shifted to within +/- 180 or two Extents if the original extent intersects the International Dateline.

This method modifies the extent geometry in-place. You should clone the extent object before calling this method where appropriate.

Returns

Type	Description
Extent []	The normalized Extent(s).

offset Method offset(dx, dy, dz){Extent}

Modifies the extent geometry in-place with X and Y offsets in map units. You should clone the extent object before calling this method where appropriate.

Parameters

dx Number

The offset distance in map units for the X-coordinate.

dy Number

The offset distance in map units for the Y-coordinate.

dz Number

The offset distance in map units for the Z-coordinate.

Returns

Type	Description
Extent	The offset Extent.

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 Inherited Method toJSON(){Object} Inherited from Geometry

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.

union Method union(extent){Extent}

Expands the original extent to include the extent of the input Extent. This method modifies the extent geometry in-place. You should clone the extent object before calling this method where appropriate.

Parameter

extent Extent

The input extent to union.

Returns

Type	Description
Extent	The union of the input Extent with the original Extent.