Hong Kong Geodetic CS

Attributes

Unit: degree (supplier to define representation)

Geodetic CRS: Hong Kong Geodetic CS

Datum: Hong Kong Geodetic

Ellipsoid: GRS 1980

Prime meridian: Greenwich

Data source: EPSG

Information source: Survey and Mapping Office, Lands Department.

Revision date: 2018-02-08

Scope: Geodesy.

Remarks: Locally sometimes referred to as ITRF96 or WGS 84, these are not strictly correct.

Area of use: China - Hong Kong - onshore and offshore.

Coordinate system: Ellipsoidal 3D CS. Axes: latitude, longitude, ellipsoidal height. Orientations: north, east, up. UoM: degree, degree, metre.

Covered area powered by MapTiler

Center coordinates
114.14 22.35

Projected bounds:
113.76 22.13
114.51 22.58

WGS84 bounds:
113.76 22.13
114.51 22.58

China - Hong Kong - onshore and offshore.

Definition: OGC Well Known Text 2 (2019)

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GEOGCRS["Hong Kong Geodetic CS",
    DATUM["Hong Kong Geodetic",
        ELLIPSOID["GRS 1980",6378137,298.257222101,
            LENGTHUNIT["metre",1]]],
    PRIMEM["Greenwich",0,
        ANGLEUNIT["degree",0.0174532925199433]],
    CS[ellipsoidal,3],
        AXIS["geodetic latitude (Lat)",north,
            ORDER[1],
            ANGLEUNIT["degree",0.0174532925199433]],
        AXIS["geodetic longitude (Lon)",east,
            ORDER[2],
            ANGLEUNIT["degree",0.0174532925199433]],
        AXIS["ellipsoidal height (h)",up,
            ORDER[3],
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["Geodesy."],
        AREA["China - Hong Kong - onshore and offshore."],
        BBOX[22.13,113.76,22.58,114.51]],
    ID["EPSG",8426]]

Definition: ESRI Well Known Text

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GEOGCS["Hong_Kong_Geodetic_CS_3D",
    DATUM["Hong_Kong_Geodetic",
        SPHEROID["GRS_1980",6378137.0,298.257222101]],
    PRIMEM["Greenwich",0.0],
    UNIT["Degree",0.0174532925199433],
    LINUNIT["Meter",1.0]]

Definition: PROJ.4

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

Definition: JavaScript (Proj4js)

proj4.defs("EPSG:8426","+proj=longlat +ellps=GRS80 +no_defs +type=crs");

Definition: JSON

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{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "GeographicCRS",
    "name": "Hong Kong Geodetic CS",
    "datum": {
        "type": "GeodeticReferenceFrame",
        "name": "Hong Kong Geodetic",
        "ellipsoid": {
            "name": "GRS 1980",
            "semi_major_axis": 6378137,
            "inverse_flattening": 298.257222101
        }
    },
    "coordinate_system": {
        "subtype": "ellipsoidal",
        "axis": [
            {
                "name": "Geodetic latitude",
                "abbreviation": "Lat",
                "direction": "north",
                "unit": "degree"
            },
            {
                "name": "Geodetic longitude",
                "abbreviation": "Lon",
                "direction": "east",
                "unit": "degree"
            },
            {
                "name": "Ellipsoidal height",
                "abbreviation": "h",
                "direction": "up",
                "unit": "metre"
            }
        ]
    },
    "scope": "Geodesy.",
    "area": "China - Hong Kong - onshore and offshore.",
    "bbox": {
        "south_latitude": 22.13,
        "west_longitude": 113.76,
        "north_latitude": 22.58,
        "east_longitude": 114.51
    },
    "id": {
        "authority": "EPSG",
        "code": 8426
    }
}

Definition: MapServer - MAPfile

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

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=longlat +ellps=GRS80 +no_defs +type=crs">
	<Layer srs="+proj=longlat +ellps=GRS80 +no_defs +type=crs">
	</Layer>
</Map>

EPSG:8426