cleanup

        x_meta = np.column_stack((azi, ele))

        # write to .csv output metadata file

        with open(

            y.metadata_files[i],

            "w",

            newline="",

            encoding="utf-8",

        ) as f:

            # create csv writer

            writer = csv.writer(f)

            # write all rows to the .csv file

            writer.writerows(csv_formatdata(x_meta))

        np.savetxt(y.metadata_files[i-1], x_meta, fmt="%0.2f", delimiter=",", encoding="utf-8")

    y.init_metadata()  # this is needed to populate 'y.object_pos[]'