code: def get_bounding_box(self):
          
          from pyproj import Geod
          geod = Geod(ellps='WGS84')
          dataset_group = DATASET_KEYS[self.datasets[0]]
          idx = 0
          lons_ring = None
          lats_ring = None
          while True:
              path = 'Data_Products/{dataset_group}/{dataset_group}_Gran_{idx}/attr/'
              prefix = path.format(dataset_group=dataset_group, idx=idx)
              try:
                  lats = self.file_content[prefix + 'G-Ring_Latitude']
                  lons = self.file_content[prefix + 'G-Ring_Longitude']
                  if lons_ring is None:
                      lons_ring = lons
                      lats_ring = lats
                  else:
                      prev_lon = lons_ring[0]
                      prev_lat = lats_ring[0]
                      dists = list(geod.inv(lon, lat, prev_lon, prev_lat)[2] for lon, lat in zip(lons, lats))
                      first_idx = np.argmin(dists)
                      if first_idx == 2 and len(lons) == 8:
                          lons_ring = np.hstack((lons[:3], lons_ring[:-2], lons[4:]))
                          lats_ring = np.hstack((lats[:3], lats_ring[:-2], lats[4:]))
                      else:
                          raise NotImplementedError("Don't know how to handle G-Rings of length %d" % len(lons))
  
              except KeyError:
                  break
              idx += 1
  
          return lons_ring, lats_ring
docs: Get the bounding box of this file.