Thread: Map Overlay on top of Nuvi existing maps

Overlay map usually is limited to lines and points, but you can experiment with areas too, you can for example define semi-transparent pattern for area.

There are many tools, free and commercial:
Creating and editing maps: GPSMapEdit, MapEdit++, Global Mapper.
Compiling maps: cgpsmapper, mkgmap, MapTk.
Editing TYP (skin): TYPViewer, MpaTK, ati.land.cz/gps/typdecomp/editor.cgi
Universal tool for all these tasks: Mapwel.

I tried using the free version of cgpsmapper to create a custom polygon (with hatching) in a single img.
However, the polygon still remains as a solid color without the customised type.
Can any kind soul out here post a sample mp file that can be used to create a custom polygon for me to compile and upload directly into my GPSr?