docs: def to_pelias_dict(self):
          """
          Convert Viewbox object to a string that can be used by Pelias
          as a query parameter.
          """
          vb = self.convert_srs(4326)
          return {
              'boundary.rect.min_lat': vb.bottom,
              'boundary.rect.min_lon': vb.left,
              'boundary.rect.max_lat': vb.top,
              'boundary.rect.max_lon': vb.right
          }