EPSG:8427 — Hong Kong Geodetic CS

GEOGCRS[
    "Hong Kong Geodetic CS",
    DATUM[
        "Hong Kong Geodetic",
        ELLIPSOID[
            "GRS 1980",
            6378137,
            298.257222101,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",7019]
        ],
        ID["EPSG",1209]
    ],
    CS[ellipsoidal,2,ID["EPSG",6422]],
    AXIS["Geodetic latitude (Lat)",north],
    AXIS["Geodetic longitude (Lon)",east],
    ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
    ID["EPSG",8427]
]

+proj=longlat +ellps=GRS80 +no_defs +type=crs

proj4.defs("EPSG:8427", "+proj=longlat +ellps=GRS80 +no_defs +type=crs");

{
  "type": "CoordinateReferenceSystem",
  "code": 8427,
  "name": "Hong Kong Geodetic CS",
  "kind": "geographic 2D",
  "area": "Hong Kong",
  "unit": "degree (supplier to define representation)",
  "bbox": [
    22.13,
    113.76,
    22.58,
    114.51
  ],
  "proj4": "+proj=longlat +ellps=GRS80 +no_defs +type=crs"
}

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (8427, 'EPSG', 8427, '+proj=longlat +ellps=GRS80 +no_defs +type=crs', 'GEOGCS["Hong Kong Geodetic CS",DATUM["Hong_Kong_Geodetic",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","1209"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","8427"]]');

PROJECTION
  "+proj=longlat"
  "+ellps=GRS80"
  "+no_defs"
  "+type=crs"
END

8427=GEOGCS["Hong Kong Geodetic CS",DATUM["Hong_Kong_Geodetic",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","1209"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","8427"]]