docs: def _cas_2(self):
          ''' Longitude overlap (2 images). '''
  
          lonc_left = self._format_lon(self.lonm)
          lonc_right = self._format_lon(self.lonM)
          latc = self._format_lat(self.latm)
  
          print(lonc_left, lonc_right, self.lonm, self.lonM)
          img_name_left = self._format_name_map(lonc_left, latc)
          print(img_name_left)
          img_left = BinaryTable(img_name_left, self.path_pdsfiles)
          X_left, Y_left, Z_left = img_left.extract_grid(self.lonm,
                                                         float(
                                                             img_left.EASTERNMOST_LONGITUDE),
                                                         self.latm,
                                                         self.latM)
  
          img_name_right = self._format_name_map(lonc_right, latc)
          img_right = BinaryTable(img_name_right, self.path_pdsfiles)
          X_right, Y_right, Z_right = img_right.extract_grid(float(img_right.WESTERNMOST_LONGITUDE),
                                                             self.lonM,
                                                             self.latm,
                                                             self.latM)
  
          X_new = np.hstack((X_left, X_right))
          Y_new = np.hstack((Y_left, Y_right))
          Z_new = np.hstack((Z_left, Z_right))
  
          return X_new, Y_new, Z_new