com.esri.ags.geometry.WebMercatorExtent

Package	com.esri.ags.geometry
Class	public class WebMercatorExtent
Inheritance	WebMercatorExtent Extent Geometry Object

Since :

ArcGIS API for Flex 2.1

An extent defined using latitude and longitude, but stored internally in web mercator units. Makes it easy to define an extent using latitude and longitude, but then use it with a web mercator map. Functionally equivalent to creating an extent in geographic coordinates, then projecting it using WebMercatorUtil.

Default MXML PropertyspatialReference

View the examples

	Property	Defined By
		center : MapPoint [read-only] Returns the centerpoint of the extent.	Extent
		extent : Extent [override] [read-only] The extent of this Extent.	Extent
		height : Number [read-only] Distance between ymin and ymax.	Extent
		maxlat : Number The maximum latitude value.	WebMercatorExtent
		maxlon : Number The maximum longitude value.	WebMercatorExtent
		minlat : Number The minimum latitude value.	WebMercatorExtent
		minlon : Number The minimum longitude value.	WebMercatorExtent
		spatialReference : SpatialReference The spatial reference of the geometry.	Geometry
		type : String [override] [read-only] The type of geometry is EXTENT.	Extent
		width : Number [read-only] Distance between xmin and xmax.	Extent
		xmax : Number Top-right x-coordinate of an extent envelope.	Extent
		xmin : Number Bottom-left x-coordinate of an extent envelope.	Extent
		ymax : Number Top-right y-coordinate of an extent envelope.	Extent
		ymin : Number Bottom-left y-coordinate of an extent envelope.	Extent

Public Methods

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Show Inherited Public Methods

	Method		Defined By
		WebMercatorExtent(minlon:Number = 0, minlat:Number = 0, maxlon:Number = 0, maxlat:Number = 0) Create a new WebMercatorExtent object.	WebMercatorExtent
		centerAt(point:MapPoint):Extent Returns a new extent of the same size but re-centered on the specified location.	Extent
		contains(geometry:Geometry):Boolean Checks if a geometry is contained in "this" extent.	Extent
		expand(factor:Number):Extent Returns a new expanded extent.	Extent
		intersection(extent:Extent):Extent Returns a new extent of the area that are in both extents.	Extent
		intersects(geometry:Geometry):Boolean Checks if the geometry in the argument intersects "this" extent.	Extent
		offset(dx:Number, dy:Number):Extent Returns a new extent with the given offset from "this" extent.	Extent
		toPolygon():Polygon Returns a new Polygon with one ring containing points equivalent to the coordinates of this extent.	Extent
		union(extent:Extent):Extent Returns a new extent that covers both areas.	Extent
		update(xmin:Number, ymin:Number, xmax:Number, ymax:Number, spatialReference:SpatialReference = null):void Updates extent with new values.	Extent

	Constant	Defined By
		EXTENT : String = esriGeometryEnvelope [static] An extent is defined by xmin, ymin, xmax and ymax.	Geometry
		MAPPOINT : String = esriGeometryPoint [static] A MapPoint is a basic point with x (often longitude), y (often latitude) and an optional spatial reference.	Geometry
		MULTIPOINT : String = esriGeometryMultipoint [static] A multipoint consists of one or more MapPoint(s).	Geometry
		POLYGON : String = esriGeometryPolygon [static] A polygon is a set of areas with three or more points.	Geometry
		POLYLINE : String = esriGeometryPolyline [static] A polyline is set of lines with two or more points.	Geometry

Property Detail

maxlat

property

maxlat:Number

The maximum latitude value.

This property can be used as the source for data binding.

Implementation
public function get maxlat():Number
public function set maxlat(value:Number):void

maxlon

property

maxlon:Number

The maximum longitude value.

This property can be used as the source for data binding.

Implementation
public function get maxlon():Number
public function set maxlon(value:Number):void

minlat

property

minlat:Number

The minimum latitude value.

This property can be used as the source for data binding.

Implementation
public function get minlat():Number
public function set minlat(value:Number):void

minlon

property

minlon:Number

The minimum longitude value.

This property can be used as the source for data binding.

Implementation
public function get minlon():Number
public function set minlon(value:Number):void

Constructor Detail

WebMercatorExtent

()

Constructor

public function WebMercatorExtent(minlon:Number = 0, minlat:Number = 0, maxlon:Number = 0, maxlat:Number = 0)

Create a new WebMercatorExtent object. The unit of the xmin,ymin,xmax,ymax properties will be defined in web mercator. A instance of SpatialReference with a wkid of web mercator is assigned internally to the spatialReference property.

Parameters

	`minlon:Number` (default = `0`) — The minimum longitude value.

	`minlat:Number` (default = `0`) — The minimum latitude value.

	`maxlon:Number` (default = `0`) — The maximum longitude value.

	`maxlat:Number` (default = `0`) — The maximum latitude value.

Examples

Specifying the extent of a Map using mxml tags inside the Map:

 <esri:Map>
     <esri:extent>
         <esri:WebMercatorExtent minlon="15" minlat="54" maxlon="40" maxlat="71"/>
     </esri:extent>
 </esri:Map>

Wed Nov 30 2011, 04:19 PM -08:00

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