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[mkgmap-dev] 2 Gb size limit gmapsupp?

From Minko ligfietser at online.nl on Thu Mar 8 17:42:47 GMT 2012

I have noticed that Basecamp and some (not all) GPS devices fails to read gmapsupp.img's > 2Gb size generated by mkgmap. 
Is this a known issue?

One example you can download at:

I tested it with other files and everytime above or around the 2 Gb size the gmapsupp.img seemed corrupt (you will notice a red progress bar instead of a green one when opening the image in Basecamp). On a Dakota I can browse the map without problems, other users reported the map is visible in the menu but not visible on the map screen (Oregon, Gmap62).

If I generate the gmapsupp.img with Mapsource everything works as expected.

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