The MAP_REVERSE procedure converts the X-Y coordinate output from routines like CURSOR and WtPointer into longitude and latitude coordinates. CURSOR and WtPointer return the coordinates of the cursor or pointer after a mouse click.

If you are developing an interactive widget-based mapping application, look at the demonstration program map_test.pro in the directory:

Where RW_DIR is the main Rogue Wave installation directory.

This program uses PV‑WAVE Widgets to create an interactive mapping demonstration. You can copy this code and use it as a template for creating your own mapping applications. To run the demonstration, move to the demo directory using the PV‑WAVE CD command, then type map_test at the PV‑WAVE prompt.