Unlike Navicore/Wayfinder on previous Maemo devices, Ovi Maps on the N900 downloads maps on demand. This is obviously a problem if you're going somewhere abroad and don't want to pay extortionate data roaming charges.
Fortunately, S60 Ovi Maps users also have the same problem, and the solution is straightforward:
- Scroll down this post to Direct Links for Ovi Map Version 00.01.25.114 and download the maps for the countries you are interested in. (EDIT: updated to different blog post)
- Unzip the maps into
cities/diskcacheon the big VFAT partition (mounted under
MyDocs) on your N900.
- That's it!
Some of the files you may already have, I've chosen to overwrite them; YMMV.
However, as far as I can tell, searching for locations still requires a network connection :-(