EPSG:3993 — Guam 1963 / Guam SPCS

PROJCRS[
    "Guam 1963 / Guam SPCS",
    BASEGEOGCRS[
        "Guam 1963",
        DATUM[
            "Guam 1963",
            ELLIPSOID[
                "Clarke 1866",
                6378206.4,
                294.978698213898,
                LENGTHUNIT["metre",1,ID["EPSG",9001]],
                ID["EPSG",7008]
            ],
            ID["EPSG",6675]
        ],
        ID["EPSG",4675]
    ],
    CONVERSION[
        "Guam SPCS",
        METHOD["Guam Projection",ID["EPSG",9831]],
        PARAMETER[
            "Latitude of natural origin",
            13.4724663527781,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8801]
        ],
        PARAMETER[
            "Longitude of natural origin",
            144.748750705556,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8802]
        ],
        PARAMETER[
            "False easting",
            50000,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",8806]
        ],
        PARAMETER[
            "False northing",
            50000,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",8807]
        ],
        ID["EPSG",15400]
    ],
    CS[Cartesian,2,ID["EPSG",4499]],
    AXIS["Easting (X)",east],
    AXIS["Northing (Y)",north],
    LENGTHUNIT["metre",1,ID["EPSG",9001]],
    ID["EPSG",3993]
]