gboolean vik_map_source_coord_to_mapcoord (VikMapSource * self, const VikCoord *src, gdouble xzoom, gdouble yzoom, MapCoord *dest );
void vik_map_source_mapcoord_to_center_coord (VikMapSource * self, MapCoord *src, VikCoord *dest);
int vik_map_source_download (VikMapSource * self, MapCoord * src, const gchar * dest_fn, void * handle);
gboolean vik_map_source_coord_to_mapcoord (VikMapSource * self, const VikCoord *src, gdouble xzoom, gdouble yzoom, MapCoord *dest );
void vik_map_source_mapcoord_to_center_coord (VikMapSource * self, MapCoord *src, VikCoord *dest);
int vik_map_source_download (VikMapSource * self, MapCoord * src, const gchar * dest_fn, void * handle);