EPSG:6637 — NAD83(MA11) / Guam Map Grid

PROJCRS[
    "NAD83(MA11) / Guam Map Grid",
    BASEGEOGCRS[
        "NAD83(MA11)",
        DATUM[
            "NAD83 (National Spatial Reference System MA11)",
            ELLIPSOID[
                "GRS 1980",
                6378137,
                298.257222101,
                LENGTHUNIT["metre",1,ID["EPSG",9001]],
                ID["EPSG",7019]
            ],
            ANCHOREPOCH[2010],
            ID["EPSG",1118]
        ],
        ID["EPSG",6325]
    ],
    CONVERSION[
        "Guam Map Grid",
        METHOD["Transverse Mercator",ID["EPSG",9807]],
        PARAMETER[
            "Latitude of natural origin",
            13.5000000000003,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8801]
        ],
        PARAMETER[
            "Longitude of natural origin",
            144.75,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8802]
        ],
        PARAMETER[
            "Scale factor at natural origin",
            1,
            SCALEUNIT["unity",1,ID["EPSG",9201]],
            ID["EPSG",8805]
        ],
        PARAMETER[
            "False easting",
            100000,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",8806]
        ],
        PARAMETER[
            "False northing",
            200000,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",8807]
        ],
        ID["EPSG",4325]
    ],
    CS[Cartesian,2,ID["EPSG",4499]],
    AXIS["Easting (X)",east],
    AXIS["Northing (Y)",north],
    LENGTHUNIT["metre",1,ID["EPSG",9001]],
    ID["EPSG",6637]
]

+proj=tmerc +lat_0=13.5 +lon_0=144.75 +k=1 +x_0=100000 +y_0=200000 +ellps=GRS80 +units=m +no_defs +type=crs

proj4.defs("EPSG:6637", "+proj=tmerc +lat_0=13.5 +lon_0=144.75 +k=1 +x_0=100000 +y_0=200000 +ellps=GRS80 +units=m +no_defs +type=crs");

{
  "type": "CoordinateReferenceSystem",
  "code": 6637,
  "name": "NAD83(MA11) / Guam Map Grid",
  "kind": "projected",
  "area": "Guam - onshore",
  "unit": "metre",
  "bbox": [
    13.18,
    144.58,
    13.7,
    145.01
  ],
  "proj4": "+proj=tmerc +lat_0=13.5 +lon_0=144.75 +k=1 +x_0=100000 +y_0=200000 +ellps=GRS80 +units=m +no_defs +type=crs"
}

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (6637, 'EPSG', 6637, '+proj=tmerc +lat_0=13.5 +lon_0=144.75 +k=1 +x_0=100000 +y_0=200000 +ellps=GRS80 +units=m +no_defs +type=crs', 'PROJCS["NAD83(MA11) / Guam Map Grid",GEOGCS["NAD83(MA11)",DATUM["NAD83_National_Spatial_Reference_System_MA11",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","1118"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","6325"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",13.5],PARAMETER["central_meridian",144.75],PARAMETER["scale_factor",1],PARAMETER["false_easting",100000],PARAMETER["false_northing",200000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","6637"]]');

PROJECTION
  "+proj=tmerc"
  "+lat_0=13.5"
  "+lon_0=144.75"
  "+k=1"
  "+x_0=100000"
  "+y_0=200000"
  "+ellps=GRS80"
  "+units=m"
  "+no_defs"
  "+type=crs"
END

6637=PROJCS["NAD83(MA11) / Guam Map Grid",GEOGCS["NAD83(MA11)",DATUM["NAD83_National_Spatial_Reference_System_MA11",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","1118"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","6325"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",13.5],PARAMETER["central_meridian",144.75],PARAMETER["scale_factor",1],PARAMETER["false_easting",100000],PARAMETER["false_northing",200000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","6637"]]