diff --git a/lib/xmet/map.py b/lib/xmet/map.py
index 4afe4ed..b94f572 100644
--- a/lib/xmet/map.py
+++ b/lib/xmet/map.py
@@ -46,6 +46,11 @@ class EquirectMap():
 
         svg.render_layer(cr, None, rect)
 
+    def draw_base_map_from_file(self,
+                                cr: cairo.Context,
+                                path: str):
+        return self.draw_from_file(cr, path, 0, 0, self.width, self.height)
+
     def screen_to_map(self, x: float, y: float) -> shapely.Point:
         lon = (x / self.width) * self.map_width + self.bounds[3]
         lat = self.height * self.map_height + self.bounds[2] + (y / self.height)