gboolean vik_map_source_supports_download_only_new (VikMapSource * self);
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);
gboolean vik_map_source_supports_download_only_new (VikMapSource * self);
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);