On Thu, 10 Dec 2009 01:03:01 +0100 Fox Mulder <[email protected]> wrote:
> So if something should be changed, than it should be tangogps and > allother apps that uses png files to use a vector format like navit > does which is way better for this purpose. Yes, and the earth is flat too ;-) As it was already pointed out in this thread navit uses vector data and tangogps uses bitmap data. Vector data allows for calculation of a route. As long as you use only very basic data it is more space efficient. If you add terrain data like opencyclemap[1] or maps-for-free[2] then you have quickly many times more data and on-the-fly rendering on an embedded device becomes impossible. Using bitmap data means it is fast because you only need to display data while a fast computer has been doing a nice rendering. Another example: in Italy there is currently the import of houses going on, i.e. you get a good idea of the streets with the bitmaps while you get emptiness with the vector data[3]. tangogps is far superior in speed, quality of maps and choice of maps. However in-car navigation is currently not its purpose. But for hiking or cycling it offers much better map data. Marcus [1]http://opencyclemap.org/?zoom=13&lat=47.46438&lon=9.55192&layers=B000 [2]http://maps-for-free.com [3]http://www.openstreetmap.org/?lat=46.07332&lon=13.23026&zoom=16&layers=B000FTF _______________________________________________ Openmoko community mailing list [email protected] http://lists.openmoko.org/mailman/listinfo/community
