GEOGCS["SIGD61",
    DATUM["Sister_Islands_Geodetic_Datum_1961",
        SPHEROID["Clarke 1866",6378206.4,294.978698213898,
            AUTHORITY["EPSG","7008"]],
        AUTHORITY["EPSG","6726"]],
    PRIMEM["Greenwich",0,
        AUTHORITY["EPSG","8901"]],
    UNIT["degree",0.0174532925199433,
        AUTHORITY["EPSG","9122"]],
    AUTHORITY["EPSG","4726"]]