> If you already have the vector data you doesn't need the bitmap data > anymore because you can render the displayed map directly from these > data. That is what navit already does and therefor a combination of > vector and bitmap data makes no sense. It would make the data redundant > and more complicated.
it would decrease cpu usage for those areas already in png. i don't know how exactly navit renders, but i got the impression, reading and displaying vector data answers for a good deal of delay. of course one could take the already rendered map and store it as tiles in a cache, with an intelligent caching policy one may be able to limit the space necessary. but then again: how many people need these tiles again? and is the rendering really the culprit for the notable delay? but that's only a theoretical question -- the immense need of space make tangogpos more ore less useless for me. i don't like the idea of downloading a mass of tiles for arther limited area. with navit's maps i get all of europe in less than tangogps needs for the greater hamburg area ... _______________________________________________ Openmoko community mailing list firstname.lastname@example.org http://lists.openmoko.org/mailman/listinfo/community