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Method: Coordinate Frame rotation (geog2D domain)
Remarks: Derived via ITRF96 @ 1998.121. Published 2002-03-01. Also published as a transformation to WGS 84 - see Hong Kong 1980 to WGS 84 (1) (code 1825).
Information source: Survey and Mapping Office, Lands Department.
Revision date: 2022-01-21
Unit: metre
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: 2006-06-22
Scope: Cadastre, engineering survey, topographic mapping (large scale).
Remarks: Replaces Hong Kong 1963 Grid System.
Area of use: China - Hong Kong - onshore and offshore.
Coordinate system: Cartesian 2D CS. Axes: northing, easting (N,E). Orientations: north, east. UoM: m.
&stroke=red&width=2&path=22.13,113.76|22.58,113.76|22.58,114.51|22.13,114.51|22.13,113.76)
Center coordinates
831936.99 823933.87
Projected bounds:
793241.31 799018.15
870617.61 848909.8
WGS84 bounds:
113.76 22.13
114.51 22.58
Definition: OGC Well Known Text
PROJCS["Hong Kong 1980 Grid System", 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"]], PROJECTION["Transverse_Mercator"], PARAMETER["latitude_of_origin",22.3121333333333], PARAMETER["central_meridian",114.178555555556], PARAMETER["scale_factor",1], PARAMETER["false_easting",836694.05], PARAMETER["false_northing",819069.8], UNIT["metre",1, AUTHORITY["EPSG","9001"]], AUTHORITY["EPSG","2326"]]
Definition: OGC Well Known Text 2 (2019)
BOUNDCRS[ SOURCECRS[ PROJCRS["Hong Kong 1980 Grid System", BASEGEOGCRS["Hong Kong 1980", DATUM["Hong Kong 1980", ELLIPSOID["International 1924",6378388,297, LENGTHUNIT["metre",1]]], PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433]], ID["EPSG",4611]], CONVERSION["Hong Kong 1980 Grid", METHOD["Transverse Mercator", ID["EPSG",9807]], PARAMETER["Latitude of natural origin",22.3121333333333, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8801]], PARAMETER["Longitude of natural origin",114.178555555556, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8802]], PARAMETER["Scale factor at natural origin",1, SCALEUNIT["unity",1], ID["EPSG",8805]], PARAMETER["False easting",836694.05, LENGTHUNIT["metre",1], ID["EPSG",8806]], PARAMETER["False northing",819069.8, LENGTHUNIT["metre",1], ID["EPSG",8807]]], CS[Cartesian,2], AXIS["northing (N)",north, ORDER[1], LENGTHUNIT["metre",1]], AXIS["easting (E)",east, ORDER[2], LENGTHUNIT["metre",1]], USAGE[ SCOPE["Cadastre, engineering survey, topographic mapping (large scale)."], AREA["China - Hong Kong - onshore and offshore."], BBOX[22.13,113.76,22.58,114.51]], ID["EPSG",2326]]], TARGETCRS[ GEOGCRS["WGS 84", ENSEMBLE["World Geodetic System 1984 ensemble", MEMBER["World Geodetic System 1984 (Transit)"], MEMBER["World Geodetic System 1984 (G730)"], MEMBER["World Geodetic System 1984 (G873)"], MEMBER["World Geodetic System 1984 (G1150)"], MEMBER["World Geodetic System 1984 (G1674)"], MEMBER["World Geodetic System 1984 (G1762)"], MEMBER["World Geodetic System 1984 (G2139)"], ELLIPSOID["WGS 84",6378137,298.257223563, LENGTHUNIT["metre",1]], ENSEMBLEACCURACY[2.0]], 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["Horizontal component of 3D system."], AREA["World."], BBOX[-90,-180,90,180]], ID["EPSG",4326]]], ABRIDGEDTRANSFORMATION["Transformation from unknown to WGS84", METHOD["Position Vector transformation (geog2D domain)", ID["EPSG",9606]], PARAMETER["X-axis translation",-162.619, ID["EPSG",8605]], PARAMETER["Y-axis translation",-276.959, ID["EPSG",8606]], PARAMETER["Z-axis translation",-161.764, ID["EPSG",8607]], PARAMETER["X-axis rotation",-0.067753, ID["EPSG",8608]], PARAMETER["Y-axis rotation",2.243648, ID["EPSG",8609]], PARAMETER["Z-axis rotation",1.158828, ID["EPSG",8610]], PARAMETER["Scale difference",0.999998905754, ID["EPSG",8611]]]]
Definition: ESRI Well Known Text
PROJCS["Hong_Kong_1980_Grid", 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]], PROJECTION["Transverse_Mercator"], PARAMETER["False_Easting",836694.05], PARAMETER["False_Northing",819069.8], PARAMETER["Central_Meridian",114.178555555556], PARAMETER["Scale_Factor",1.0], PARAMETER["Latitude_Of_Origin",22.3121333333333], UNIT["Meter",1.0]]
Definition: JavaScript (Proj4js)
proj4.defs("EPSG:2326","+proj=tmerc +lat_0=22.3121333333333 +lon_0=114.178555555556 +k=1 +x_0=836694.05 +y_0=819069.8 +ellps=intl +towgs84=-162.619,-276.959,-161.764,-0.067753,2.243648,1.158828,-1.094246 +units=m +no_defs +type=crs");
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "BoundCRS", "source_crs": { "type": "ProjectedCRS", "name": "Hong Kong 1980 Grid System", "base_crs": { "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" } ] }, "id": { "authority": "EPSG", "code": 4611 } }, "conversion": { "name": "Hong Kong 1980 Grid", "method": { "name": "Transverse Mercator", "id": { "authority": "EPSG", "code": 9807 } }, "parameters": [ { "name": "Latitude of natural origin", "value": 22.3121333333333, "unit": "degree", "id": { "authority": "EPSG", "code": 8801 } }, { "name": "Longitude of natural origin", "value": 114.178555555556, "unit": "degree", "id": { "authority": "EPSG", "code": 8802 } }, { "name": "Scale factor at natural origin", "value": 1, "unit": "unity", "id": { "authority": "EPSG", "code": 8805 } }, { "name": "False easting", "value": 836694.05, "unit": "metre", "id": { "authority": "EPSG", "code": 8806 } }, { "name": "False northing", "value": 819069.8, "unit": "metre", "id": { "authority": "EPSG", "code": 8807 } } ] }, "coordinate_system": { "subtype": "Cartesian", "axis": [ { "name": "Northing", "abbreviation": "N", "direction": "north", "unit": "metre" }, { "name": "Easting", "abbreviation": "E", "direction": "east", "unit": "metre" } ] }, "id": { "authority": "EPSG", "code": 2326 } }, "target_crs": { "type": "GeographicCRS", "name": "WGS 84", "datum_ensemble": { "name": "World Geodetic System 1984 ensemble", "members": [ { "name": "World Geodetic System 1984 (Transit)", "id": { "authority": "EPSG", "code": 1166 } }, { "name": "World Geodetic System 1984 (G730)", "id": { "authority": "EPSG", "code": 1152 } }, { "name": "World Geodetic System 1984 (G873)", "id": { "authority": "EPSG", "code": 1153 } }, { "name": "World Geodetic System 1984 (G1150)", "id": { "authority": "EPSG", "code": 1154 } }, { "name": "World Geodetic System 1984 (G1674)", "id": { "authority": "EPSG", "code": 1155 } }, { "name": "World Geodetic System 1984 (G1762)", "id": { "authority": "EPSG", "code": 1156 } }, { "name": "World Geodetic System 1984 (G2139)", "id": { "authority": "EPSG", "code": 1309 } } ], "ellipsoid": { "name": "WGS 84", "semi_major_axis": 6378137, "inverse_flattening": 298.257223563 }, "accuracy": "2.0", "id": { "authority": "EPSG", "code": 6326 } }, "coordinate_system": { "subtype": "ellipsoidal", "axis": [ { "name": "Geodetic latitude", "abbreviation": "Lat", "direction": "north", "unit": "degree" }, { "name": "Geodetic longitude", "abbreviation": "Lon", "direction": "east", "unit": "degree" } ] }, "id": { "authority": "EPSG", "code": 4326 } }, "transformation": { "name": "Transformation from unknown to WGS84", "method": { "name": "Position Vector transformation (geog2D domain)", "id": { "authority": "EPSG", "code": 9606 } }, "parameters": [ { "name": "X-axis translation", "value": -162.619, "unit": "metre", "id": { "authority": "EPSG", "code": 8605 } }, { "name": "Y-axis translation", "value": -276.959, "unit": "metre", "id": { "authority": "EPSG", "code": 8606 } }, { "name": "Z-axis translation", "value": -161.764, "unit": "metre", "id": { "authority": "EPSG", "code": 8607 } }, { "name": "X-axis rotation", "value": -0.067753, "unit": { "type": "AngularUnit", "name": "arc-second", "conversion_factor": 4.84813681109536e-06 }, "id": { "authority": "EPSG", "code": 8608 } }, { "name": "Y-axis rotation", "value": 2.243648, "unit": { "type": "AngularUnit", "name": "arc-second", "conversion_factor": 4.84813681109536e-06 }, "id": { "authority": "EPSG", "code": 8609 } }, { "name": "Z-axis rotation", "value": 1.158828, "unit": { "type": "AngularUnit", "name": "arc-second", "conversion_factor": 4.84813681109536e-06 }, "id": { "authority": "EPSG", "code": 8610 } }, { "name": "Scale difference", "value": -1.094246, "unit": { "type": "ScaleUnit", "name": "parts per million", "conversion_factor": 1e-06 }, "id": { "authority": "EPSG", "code": 8611 } } ] } }
Definition: GeoServer
2326=PROJCS["Hong Kong 1980 Grid System",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"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",22.3121333333333],PARAMETER["central_meridian",114.178555555556],PARAMETER["scale_factor",1],PARAMETER["false_easting",836694.05],PARAMETER["false_northing",819069.8],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG","2326"]]
Definition: MapServer - MAPfile
PROJECTION "proj=tmerc" "lat_0=22.3121333333333" "lon_0=114.178555555556" "k=1" "x_0=836694.05" "y_0=819069.8" "ellps=intl" "towgs84=-162.619,-276.959,-161.764,-0.067753,2.243648,1.158828,-1.094246" "units=m" "no_defs" "type=crs" END
Definition: Mapnik
<?xml version="1.0" encoding="utf-8"?> <Map srs="+proj=tmerc +lat_0=22.3121333333333 +lon_0=114.178555555556 +k=1 +x_0=836694.05 +y_0=819069.8 +ellps=intl +towgs84=-162.619,-276.959,-161.764,-0.067753,2.243648,1.158828,-1.094246 +units=m +no_defs +type=crs"> <Layer srs="+proj=tmerc +lat_0=22.3121333333333 +lon_0=114.178555555556 +k=1 +x_0=836694.05 +y_0=819069.8 +ellps=intl +towgs84=-162.619,-276.959,-161.764,-0.067753,2.243648,1.158828,-1.094246 +units=m +no_defs +type=crs"> </Layer> </Map>
Definition: SQL (PostGIS)
INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 2326, 'EPSG', 2326, '+proj=tmerc +lat_0=22.3121333333333 +lon_0=114.178555555556 +k=1 +x_0=836694.05 +y_0=819069.8 +ellps=intl +towgs84=-162.619,-276.959,-161.764,-0.067753,2.243648,1.158828,-1.094246 +units=m +no_defs +type=crs', 'PROJCS["Hong Kong 1980 Grid System",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"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",22.3121333333333],PARAMETER["central_meridian",114.178555555556],PARAMETER["scale_factor",1],PARAMETER["false_easting",836694.05],PARAMETER["false_northing",819069.8],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG","2326"]]');
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