+ elsif params['bbox']
+ bbox = BoundingBox.from_bbox_params(params)
+
+ @lon = bbox.centre_lon
+ @lat = bbox.centre_lat
+ @zoom = 16
+ elsif params['minlon'] and params['minlat'] and params['maxlon'] and params['maxlat']
+ bbox = BoundingBox.from_lon_lat_params(params)
+
+ @lon = bbox.centre_lon
+ @lat = bbox.centre_lat
+ @zoom = 16
+