Thread: Multiple maps on SD Card

3790 should show maps in Mymap list and they go in Map folder with anyname.img in sd
Garmin folder only accepts: gmapsupp.img

Thanks for the advice Catymag, I done as you suggested which does show some maps but not others. The CityXplorer maps, US Borders and County overlay, Theme Park maps and some Topo maps fail to show, does this mean these have to be named gmapsupp.img to work? Or does it mean I need a .unl file to have it work? Please forgive my ignorance, I'm a total noob at this. :-S

You cant have routable maps in your unit covering the same region, if they overlap they wont show in gps and you'll have problems.
If a map is unlocked it doesnt need any .unl file. Every kind of .img should show in mylist if put in Map folder with anymame.img.
You can have CX maps , topo maps ,CN maps and select them in mylist .
With City Xplorer maps it's a bit different you can have CN and CX both in your unit,
The CX map is the same than related CN map provides,but you can have both in your unit and select CX in pedestrian mode when you want to use it, in my 3790 by the way, if i forget to deselect it , I can use CN just as pedestrian mode even car mode is selected.

Starting from many unlocked img files, does anyone knows how to have single selection maps on device?
thx

I dont think it's possible coz even if you merge them with Gmaptool ,you'll have a multi selection ,coz FIDs are more than one and Garmin will show a selectable map for every FID.

Sorry, I didn't explain myself well, because of my poor english.

--> I aim to have many selectable boxes, 1 for each img, but I can't!

My Zumo500 works this way:
-when I merge many img-map-files (coming from the same Garmin map version) in 1 img-map-file using Gmaptool, I obtain only 1 selectable box.
-if I put many img-map-files (coming from the same Garmin map version) in internal device memory naming them with different names such as gmapprom.img, gmapsupp.img, gmapsup2.img and even another gmapsupp.img in SD, I obtain only 1 selectable box as above.
-I can obtain separate selectable boxes ONLY if img-map-files are coming from different versions of Garmin maps.

I guess if it's possible to change file attributes using Gmaptool to simulate that a file is coming from a different Garmin map version.........

Originally Posted by gitan

Sorry, I didn't explain myself well, because of my poor english.

--> I aim to have many selectable boxes, 1 for each img, but I can't!

My Zumo500 works this way:
-when I merge many img-map-files (coming from the same Garmin map version) in 1 img-map-file using Gmaptool, I obtain only 1 selectable box.
-if I put many img-map-files (coming from the same Garmin map version) in internal device memory naming them with different names such as gmapprom.img, gmapsupp.img, gmapsup2.img and even another gmapsupp.img in SD, I obtain only 1 selectable box as above.
-I can obtain separate selectable boxes ONLY if img-map-files are coming from different versions of Garmin maps.

I guess if it's possible to change file attributes using Gmaptool to simulate that a file is coming from a different Garmin map version.........

I understood perfectly and the reply is the same than above
No , because these maps have the same FID (Mapid) , they comes from an unique map and Garmin sees them like just one map-
Should change FIDs , but this is another story, a bit complicate or impossible-