GitHub - btittelbach/openmtbmap_openvelomap_linux: Linux script to extract and compile garmin *.img map files from openmtbmap.org or openvelomap.org downloads
Compilation of OpenStreetMap OSM files to Garmin compatible IMG maps
Maps for Garmin Devices | Tim's Blog
GMapTool | GMapTool
Breaking Up A Garmin gmapsupp.img Map File Into Separate Map Tiles
Manual merging of maps in IMG file format
JaVaWa help - GPS technology and devices - Geocaching Forums