PROJ (define a map projection)

The PROJ command allows you to define the cartographic projection used for a map. This is required if:

A geographic reference grid must be drawn on the map or the input data is in a projection different from the map projection.

The MDF file read in by the MDFF command may also define a map projection. A map projection is defined by a projection file.

Command Syntax:

Command Parameters:

map.prj

The name of a projection file that describes the map projection of the map.

A blank, documented projection file named PROJECT.PRJ can be copied from the Geosoft directory to the local working directory and used as a template for creating a new projection definition.

Example

This will draw a longitude-latitude grid at increments of 2'30". The map projection is defined by the projection file UTM17.PRJ. The grid can then be annotated along the edges using the ALON and ALAT commands.

This command is part of the MAPPLOT GX.