Hi Gerd,
Garmin img consist of subfiles. There are some workable set of subfiles:
basic map: TRE+RGN+LBL
advanced: TRE+RGN+LBL+NET
routable: TRE+RGN+LBL+NET+NOD
IMO mkgmap should allow for creating any of these 3 types of maps.
NOD subfile can be removed from img after creating, but I would prefer
to have option for advanced map too. There is even obsolete option
"net", which suggest this kind of map.
As far as I know, you can't remove NET subfile from img. It won't be
possible to get basic map without support for it in mkgmap.
--
Best regards,
Andrzej
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