EPSG:4611

Hong Kong 1980

Transform Get position on a map

Available transformations
to EPSG:4326
EPSG:4326 - WGS 84

  • China - Hong Kong - onshore and offshore. , accuracy 1.0 m, code 1825 (default) [7]

Selected transformation

Name: Hong Kong 1980 to WGS 84 (1)

Method: Coordinate Frame rotation (geog2D domain)

Remarks: Derived via ITRF96 @ 1998.121. Published 2002-03-01. Parameter values from Hong Kong 1980 to Hong Kong Geodetic CS (1) (code 9913) assuming Hong Kong Geodetic CS and WGS 84 are equivalent within the accuracy of the CT.

Information source: Geodetic Survey Section, Survey and Mapping Office, Lands Department, Hong Kong. http://www.info.gov.hk/landsd/mapping/tindex.htm

Revision date: 2022-01-21

Attributes

Unit: degree (supplier to define representation)

Geodetic CRS: Hong Kong 1980

Datum: Hong Kong 1980

Ellipsoid: International 1924

Prime meridian: Greenwich

Data source: EPSG

Information source: Survey and Mapping Office, Lands Department. Http://www.info.gov.hk/landsd/mapping/tindex.htm

Revision date: 2006-02-06

Scope: Geodesy.

Remarks: Replaces Hong Kong 1963 and Hong Kong 1963(67).

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

Coordinate system: Ellipsoidal 2D CS. Axes: latitude, longitude. Orientations: north, east. UoM: degree

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Center coordinates
114.13 22.36

WGS84 bounds:
113.76 22.13
114.51 22.58

China - Hong Kong - onshore and offshore.
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Definition: OGC Well Known Text

GEOGCS["Hong Kong 1980",
    DATUM["Hong_Kong_1980",
        SPHEROID["International 1924",6378388,297],
        TOWGS84[-162.619,-276.959,-161.764,-0.067753,2.243648,1.158828,-1.094246]],
    PRIMEM["Greenwich",0,
        AUTHORITY["EPSG","8901"]],
    UNIT["degree",0.0174532925199433,
        AUTHORITY["EPSG","9122"]],
    AUTHORITY["EPSG","4611"]]

Definition: OGC Well Known Text 2 (2019)

GEOGCRS["Hong Kong 1980",
    DATUM["Hong Kong 1980",
        ELLIPSOID["International 1924",6378388,297,
            LENGTHUNIT["metre",1]]],
    PRIMEM["Greenwich",0,
        ANGLEUNIT["degree",0.0174532925199433]],
    CS[ellipsoidal,2],
        AXIS["geodetic latitude (Lat)",north,
            ORDER[1],
            ANGLEUNIT["degree",0.0174532925199433]],
        AXIS["geodetic longitude (Lon)",east,
            ORDER[2],
            ANGLEUNIT["degree",0.0174532925199433]],
    USAGE[
        SCOPE["Geodesy."],
        AREA["China - Hong Kong - onshore and offshore."],
        BBOX[22.13,113.76,22.58,114.51]],
    ID["EPSG",4611]]

Definition: ESRI Well Known Text

GEOGCS["GCS_Hong_Kong_1980",
    DATUM["D_Hong_Kong_1980",
        SPHEROID["International_1924",6378388.0,297.0]],
    PRIMEM["Greenwich",0.0],
    UNIT["Degree",0.0174532925199433]]

Definition: PROJ.4

+proj=longlat +ellps=intl +towgs84=-162.619,-276.959,-161.764,-0.067753,2.243648,1.158828,-1.094246 +no_defs +type=crs

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:4611","+proj=longlat +ellps=intl +towgs84=-162.619,-276.959,-161.764,-0.067753,2.243648,1.158828,-1.094246 +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "GeographicCRS",
    "name": "Hong Kong 1980",
    "datum": {
        "type": "GeodeticReferenceFrame",
        "name": "Hong Kong 1980",
        "ellipsoid": {
            "name": "International 1924",
            "semi_major_axis": 6378388,
            "inverse_flattening": 297
        }
    },
    "coordinate_system": {
        "subtype": "ellipsoidal",
        "axis": [
            {
                "name": "Geodetic latitude",
                "abbreviation": "Lat",
                "direction": "north",
                "unit": "degree"
            },
            {
                "name": "Geodetic longitude",
                "abbreviation": "Lon",
                "direction": "east",
                "unit": "degree"
            }
        ]
    },
    "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": 4611
    }
}

Definition: GeoServer

4611=GEOGCS["Hong Kong 1980",DATUM["Hong_Kong_1980",SPHEROID["International 1924",6378388,297],TOWGS84[-162.619,-276.959,-161.764,-0.067753,2.243648,1.158828,-1.094246]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4611"]]

Definition: MapServer - MAPfile

PROJECTION
	"proj=longlat"
	"ellps=intl"
	"towgs84=-162.619,-276.959,-161.764,-0.067753,2.243648,1.158828,-1.094246"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=longlat +ellps=intl +towgs84=-162.619,-276.959,-161.764,-0.067753,2.243648,1.158828,-1.094246 +no_defs +type=crs">
	<Layer srs="+proj=longlat +ellps=intl +towgs84=-162.619,-276.959,-161.764,-0.067753,2.243648,1.158828,-1.094246 +no_defs +type=crs">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 4611, 'EPSG', 4611, '+proj=longlat +ellps=intl +towgs84=-162.619,-276.959,-161.764,-0.067753,2.243648,1.158828,-1.094246 +no_defs +type=crs', 'GEOGCS["Hong Kong 1980",DATUM["Hong_Kong_1980",SPHEROID["International 1924",6378388,297],TOWGS84[-162.619,-276.959,-161.764,-0.067753,2.243648,1.158828,-1.094246]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4611"]]');