+void maps_layer_register_map_source ( const char *label, VikMapSource *map );
+void maps_layer_download_section_without_redraw ( VikMapsLayer *vml, VikViewport *vvp, VikCoord *ul, VikCoord *br, gdouble zoom);
+gint vik_maps_layer_get_map_type(VikMapsLayer *vml);
+gchar *vik_maps_layer_get_map_label(VikMapsLayer *vml);
+gchar *maps_layer_default_dir ();
+
+