PROJCS["Tonga Map Grid",
    GEOGCS["Tonga Geodetic Datum 2005",
        DATUM["Not_specified_based_on_GRS_1980_ellipsoid",
            SPHEROID["GRS_1980",6378137.0,298.257222101]],
        PRIMEM["Greenwich",0.0],
        UNIT["Degree",0.0174532925199433]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["False_Easting",1500000.0],
    PARAMETER["False_Northing",5000000.0],
    PARAMETER["Central_Meridian",-177.0],
    PARAMETER["Scale_Factor",0.9996],
    PARAMETER["Latitude_Of_Origin",0.0],
    UNIT["Meter",1.0]]