Merge pull request #395 from ladoramkershner/polygon

            # get ISIS footprint if possible

            if utils.find_in_dict(self.geodata.metadata, "Polygon"):

                footprint_latlon =  shapely.wkt.loads(self.geodata.footprint.ExportToWkt())

                if isinstance(footprint_latlon, shapely.geometry.Polygon):

                    footprint_latlon = shapely.geometry.MultiPolygon(list(footprint_latlon))

                cam_type = 'isis'

                return footprint_latlon, cam_type

            # Get CSM footprint