Not as easy as I thought, there are many grmn_type keys that needs to be mapped to corresponding keys from the shape files vendor (Lantmäteriet). One small typo error gives error message from MPC that does not give any clue to what is wrong and there are amny keys and layers. And the processing with MPC takes all night to complete.

But, I have found out a workaround. I have made a map with the parts that are interesting for me, the things that have changed since the FriProv4 map which is the roads and paths. The rest of the things in the FriProv4 describes the parts of the nature that does not change like lakes, streams, mountains etc.
So, using the shape files of the layers for the roads, paths etc and producing a map with transparent background checked in MPC was fairly easy.
The other part of the workaround is to use TYPViewer to make all roads, paths etc in FriProv4 invisible and then use MapSource to produce a .img file without roads.

With both maps loaded into the gps and selected I can now see the new "FriProv5" in my gpsmap64s!

Below are prints from the FriProv4 original, the FriProv4 without roads and my transparent road map. A new road can be seen in the road map.


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[Only registered and activated users can see links. ]


[Only registered and activated users can see links. ]

I have not been able to combine the two maps with gmaptool, they have different mapIDs and different TYP files. It would be nice to have them combined i.e. for my gpsmap60CSx and for easy viewing in MapSource.