SetMapProjection()

Sets the projection and coordinate system used in a map.

SetMapProjection(string map_name, string proj_name, array parameters)

Argument	Contents
map_name	The name of the map, or null for the current map
proj_name	The name of the projection; see Notes
parameters	An array of projection parameters (strings); see Notes

If the map has an image layer, SetMapProjection() cannot change the projection from that of the image layer. You must drop the image layer to change the projection of the map.
For more details on the name of the projection (using the abbreviation) and the projection parameters, see Custom Coordinate System.

// Change the map's projection to UTM, zone 19, meters

SetMapProjection(null, "utm", {"zone=19", "ellps=GRS80"})

// Change the map's projection to 1983 State Plane, Massachusetts Mainland, US Survey Feet

SetMapProjection(null, "nad83:2001", {"units=us-ft"})

Function	Summary
SetMapOptions()	Sets options for a map window
GetMapProjection()	Returns the projection and coordinate system used in a map
GetProjectionScope()	Returns a valid scope for a particular projection