Quoting Carlos Dávila <cdavilam@jemila.jazztel.es>:
I have followed all these steps up to step 6 and finally combined maps obtained in steps 4 and 6 using mkgmap just with --gmapsupp. In my Nuvi I can select/deselect any of the maps but when seeing the map it doesn't work as expected. Regular map doesn't seem to be transparent and I can see the sea only in the areas where the regular map doesn't overlap the sea map. When I zoom or pan the map in overlapped areas I can see the sea just for a second until regular map is drawn on top. Has anyone succeeded with this method?
Once you install the maps on your device, you can also select and deselect the entire maps for display.
- On an eTrex you can do this by paging to the map setup page. - On a Nuvi you can do this by navigating to the map options area.
In my case both maps are shown as "family name" "[1] OSM street map" although they were built with different parameters Cheers Carlos
Have you tried using sendmap instead (to create the single gmapsupp.img file)? -- Charlie