ref: c6a16dc58a2cb3152cd0b08b81fbf85df713280b
dir: /fns.h/
int lon2tilex(double lon, int z); int lat2tiley(double lat, int z); double tilex2long(int x, int z); double tiley2lat(int y, int z); GBundle getbundle(GPos pos, int zoom); GPos getlocation(void); GProvider *getprovider(void);