[jat1]

I was looking into an idea similar to this and I started looking at using open street map to generate map data to solve this issue. Open Street map db has tons of info that you don't see on the normal 'maps' so making custom maps was really the way to go. The idea being to download map 'packs' that contain sufficient detail to get to the areas of interest then more detailed maps only for those areas (to avoid having to download huge datasets before you travel and to make it possible to download new ones from wifi points while away)

This idea really interests me and as I am about to embark on long term travel I intend to explore these ideas more.

The audio though, thats another story.