EPSG:19978

Hong Kong 1980 Grid

Attributes

Data source: EPSG

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

Revision date: 2002-06-22

Scope: Cadastre, engineering survey, topographic mapping (large scale).

Remarks: Grid origin is Partiridge Hill triangulation station (old trig "2").

Method: Transverse Mercator

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

Description: (0,)

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China - Hong Kong - onshore and offshore.

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Definition: OGC Well Known Text

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]

Definition: OGC Well Known Text 2 (2019)

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]],
    ID["EPSG",19978]]

Definition: ESRI Well Known Text

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]

Definition: PROJ.4

+proj=tmerc +lat_0=22.3121333333333 +lon_0=114.178555555556 +k=1 +x_0=836694.05 +y_0=819069.8

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:19978","+proj=tmerc +lat_0=22.3121333333333 +lon_0=114.178555555556 +k=1 +x_0=836694.05 +y_0=819069.8");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "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
            }
        }
    ],
    "id": {
        "authority": "EPSG",
        "code": 19978
    }
}

Definition: GeoServer

19978=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]

Definition: MapServer - MAPfile

PROJECTION
	"proj=tmerc"
	"lat_0=22.3121333333333"
	"lon_0=114.178555555556"
	"k=1"
	"x_0=836694.05"
	"y_0=819069.8"
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">
	<Layer srs="+proj=tmerc +lat_0=22.3121333333333 +lon_0=114.178555555556 +k=1 +x_0=836694.05 +y_0=819069.8">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 19978, 'EPSG', 19978, '+proj=tmerc +lat_0=22.3121333333333 +lon_0=114.178555555556 +k=1 +x_0=836694.05 +y_0=819069.8', '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]');