Coordinate System Support

[BrianHaren]

Are there plans to provide for multiple coordinate system support in future releases?  We would like to be able to build simple web applications for First Responders using US National Grid as the reference coordinate system.  To be an effective tool we need to be able to display USNG coordinates AND be able to seach against them.

[ShellyGill2]

There's no current plans to allow setting the coordinate system of the map by choosing from a list, the coordinate system is defined when the map is created - you can make a map that has a different coordinate system by basing the new map on a service that has the coordinate system that you want to use (click New Map split button, choose Advanced, and then choose service URL). There's one important caveat - the existing provided basemaps are tiled services in the web mercator coordinate system, so can't be used any more.

See this help topic for more info:
http://help.arcgis.com/en/arcgisexplorer/help/#/Create_a_new_map/01560000003t000000/
And see the Note at the bottom:
"If the spatial reference of the basemap is not Web Mercator, the basemaps in the Basemap gallery will be disabled.
Each new map is displayed using the spatial reference of the basemap source. If you later want to add a tiled map service to the map, it must match the spatial reference of the basemap; if it doesn't it will be added as a dynamic map service. Dynamic map services will be projected on the fly."