Loading Aerial on GPS
I have a Garmin Colorado 400t series GPS handheld and was wondering if raster tiff with projection aerial files could be added to the handheld. Full county mosaics is not needed only specific areas will be included. Is this possible? Also will Global Mapper be able to read the GPS unit and transfer waypoints and routes onto a base map in the software? and can user created waypoints be made in the software and then transferred back to the GPS. Thanks for all you help!