Sets the source coordinate system for converting points.
(ade_projsetsrc cscode)
Returns T or nil.
| cscode | Coordinate system code (string), eight characters. |
Before you can use either ade_projptforward or ade_projptbackward to convert points, you must first identify the coordinate systems that you are converting between. Use ade_projsetsrc to set the source system and ade_projsetdest to set the destination system. The ade_projptforward function assumes that the coordinate values you pass to it belong to the source system, and it returns corresponding destination values. The ade_projptbackward function does the inverse.
For more information, see Converting Coordinates.