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
Longitude overlap (2 images).