On Sun, Mar 20, 2011 at 2:02 PM, Steve Ratcliffe <steve@parabola.me.uk> wrote:
Hi
I've been experimenting with Garmin BaseCamp opening gmapsupp.img files that I create. It works fine for some files (even getting the .TYP styling correct) but not for others. After a few hours of testing it seems that it'll open gmapsupp.img files created from 1-20 .osm files but not 30+ .osm files. I'm not certain yet if it's the exact number of files, or the combined size that triggers the failure.
Is the size of the resulting gmapsupp.img around 128M when it goes wrong?
If so it could be the 'filesystem' parameters in the header, which are set to allow a size of 128M. This is ignored by devices so isn't usually a problem.
Sorry for the delay. That's exactly the problem, it works for maps up to 128M but not higher than that. I had a little explore in the source code and found the tantalising "gives 128M will try more later" comment, and naively tried a larger number of cylinders. Tried 0x200 but that didn't work. Reading the code below that bit I realise now it might not be so easy :-) I'm happy to do some more experimentation / testing patches etc if you can give me some things to try. Cheers, Andy