Spatial references are defined using a well-known ID (wkid) or well-known text (wkt).
Part of the Esri ArcGIS REST API (see http://resources.arcgis.com/en/help/rest/apiref/geometry.html).
Spatial references are defined using a well-known ID (wkid) or well-known text (wkt).
Part of the Esri ArcGIS REST API (see http://resources.arcgis.com/en/help/rest/apiref/geometry.html).