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SpatialReference | API Reference | ArcGIS API for JavaScript 3.46

require(["esri/SpatialReference"], function(SpatialReference) { /* code goes here */ });

Description

(Added at v1.0)

Defines the spatial reference of a map, layer, or task parameters. This indicates the Projected or Geographic Coordinate System used to locate geographic features in the map. Each coordinate system is defined by either a well-known ID (WKID) or a definition string (WKT). Note that for versions prior to ArcGIS 10, only

wkid

was supported. For a full list of supported spatial reference IDs and their corresponding definition strings, see

Using spatial references

Samples

Search for

samples

that use this class.

Subclasses Constructors Properties wkid Number The well-known ID of a spatial reference. wkt String The well-known text that defines a spatial reference. Methods equals(sr) Boolean Returns true if the input spatial reference object has the same wkid or wkt as this spatial reference object. isWebMercator() Boolean Returns true if the wkid of the spatial reference object is one of the following values: 102113, 102100, 3857. toJson() Object Returns an easily serializable object representation of the spatial reference.

Constructor Details

Creates a new SpatialReference object.

Parameters: <Object> json Required The REST JSON representation of the spatial reference. {"wkid" : <wkid>} Sample:

Specify the spatial reference using either well-known text (wkt) or a well-known id (wkid). Note that pre 10 only wkid was supported.

require([
  "esri/SpatialReference", ... 
], function(SpatialReference, ... ) {
  var spatialReference = new SpatialReference({wkid:32662});

  var spatialReference2 = new SpatialReference({"wkt": 'PROJCS["NAD_1983_HARN_StatePlane_Oregon_North_FIPS_3601",' + 
    'GEOGCS["GCS_North_American_1983_HARN",DATUM["D_North_American_1983_HARN",' +
    'SPHEROID["GRS_1980",6378137.0,298.257222101]]' +
    'PRIMEM["Greenwich",0.0],' +
    'UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic"],' +
    'PARAMETER["False_Easting",8202099.737532808],PARAMETER["False_Northing",0.0],' +
    'PARAMETER["Central_Meridian",-120.5],' +
    'PARAMETER["Standard_Parallel_1",44.33333333333334],' +
    'PARAMETER["Standard_Parallel_2",46.0],' +
    'PARAMETER["Latitude_Of_Origin",43.66666666666666],UNIT["Foot",0.3048]]'
  });
  ...
});

Create a spatial reference object and initialize it with a well-known ID (wkid). (Added at v2.8)

Parameters: <Number> wkid Required The well-known id (wkid) of the coordinate system. Sample:

require([
  "esri/SpatialReference", ... 
], function(SpatialReference, ... ) {
  var sr = new SpatialReference(4326);
  ...
});

Create a spatial reference object and initialize it with the given well-known text (wkt). (Added at v2.8)

Parameters: <String> wkt Required The well-known text (wkt) of the coordinate system. Sample:

require([
  "esri/SpatialReference", ... 
], function(SpatialReference, ... ) {
  var sr = new SpatialReference('GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",
    SPHEROID["WGS_1984",6378137.0,298.257223563]],
    PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]]'
  );
  ...
});

Property Details

The well-known text that defines a spatial reference.

Method Details

Returns true if the input spatial reference object has the same wkid or wkt as this spatial reference object. Returns false otherwise. (Added at v3.3)

Sample:

require(["esri/SpatialReference"], function(SpatialReference) {
  var sr1 = new SpatialReference(4326);
  var sr2 = new SpatialReference(4326);
  console.log(sr1.equals(sr2)); // true
});

Returns true if the wkid of the spatial reference object is one of the following values: 102113, 102100, 3857. (Added at v3.3)

Sample:

require([
  "esri/SpatialReference", ... 
], function(SpatialReference, ... ) {
  var sr = new SpatialReference(102100);
  console.log(sr.isWebMercator()); // true
  ...
});

Returns an easily serializable object representation of the spatial reference.

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