code: def _scene_centroid(self):
          
          ul_lat = self.corner_ul_lat_product
          ll_lat = self.corner_ll_lat_product
          ul_lon = self.corner_ul_lon_product
          ur_lon = self.corner_ur_lon_product
          lat = (ul_lat + ll_lat) / 2.
          lon = (ul_lon + ur_lon) / 2.
  
          return lat, lon
docs: Compute image center coordinates
          :return: Tuple of image center in lat, lon