Converts output from routines like CURSOR and WtPointer from device, normal, or data coordinates to longitude and latitude coordinates.
y A variable containing the value (e.g., row of the current cursor position) to convert to a latitude value.
lat A named variable to receive the calculated latitude value.
Device If present and nonzero, specifies that device coordinates are the input.
Normal If present and nonzero, specifies that normal coordinates are the input.
You cannot use this routine when the Projection keyword is set to 99 (3D Mapping onto Sphere) because it is not a projection, but a true 3D representation of the data.
MAP CURSOR, x, y MAP_REVERSE, x, y, lon, lat PRINT, 'Longitude = ', lon, 'Latitude = ', lat
WtPointer (in the PV-WAVE GUI Application Developer's Guide)