EPSG:3821

TWD67

Attributes

Unit: degree (supplier to define representation)

Geodetic CRS: TWD67

Datum: Taiwan Datum 1967

Ellipsoid: GRS 1967 Modified

Prime meridian: Greenwich

Data source: EPSG

Information source: National Land Surveying and Mapping Center (NLSC), http://www.nlsc.gov.tw

Revision date: 2008-08-11

Scope: Geodesy.

Remarks: Shares the same origin point with the earlier Hu Tzu Shan system (CRS code 4236) but away from this point coordinates differ. Do not confuse!

Area of use: Taiwan, Republic of China - onshore - Taiwan Island, Penghu (Pescadores) Islands.

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

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SimpleMap

Center coordinates
120.66 23.61

WGS84 bounds:
119.25 21.87
122.06 25.34

Taiwan, Republic of China - onshore - Taiwan Island, Penghu (Pescadores) Islands.
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Definition: OGC Well Known Text

GEOGCS["TWD67",
    DATUM["Taiwan_Datum_1967",
        SPHEROID["GRS 1967 Modified",6378160,298.25,
            AUTHORITY["EPSG","7050"]],
        AUTHORITY["EPSG","1025"]],
    PRIMEM["Greenwich",0,
        AUTHORITY["EPSG","8901"]],
    UNIT["degree",0.0174532925199433,
        AUTHORITY["EPSG","9122"]],
    AUTHORITY["EPSG","3821"]]

Definition: OGC Well Known Text 2 (2019)

GEOGCRS["TWD67",
    DATUM["Taiwan Datum 1967",
        ELLIPSOID["GRS 1967 Modified",6378160,298.25,
            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["Taiwan, Republic of China - onshore - Taiwan Island, Penghu (Pescadores) Islands."],
        BBOX[21.87,119.25,25.34,122.06]],
    ID["EPSG",3821]]

Definition: ESRI Well Known Text

GEOGCS["GCS_TWD_1967",
    DATUM["D_TWD_1967",
        SPHEROID["GRS_1967_Truncated",6378160.0,298.25]],
    PRIMEM["Greenwich",0.0],
    UNIT["Degree",0.0174532925199433]]

Definition: PROJ.4

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

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:3821","+proj=longlat +ellps=aust_SA +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "GeographicCRS",
    "name": "TWD67",
    "datum": {
        "type": "GeodeticReferenceFrame",
        "name": "Taiwan Datum 1967",
        "ellipsoid": {
            "name": "GRS 1967 Modified",
            "semi_major_axis": 6378160,
            "inverse_flattening": 298.25
        }
    },
    "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": "Taiwan, Republic of China - onshore - Taiwan Island, Penghu (Pescadores) Islands.",
    "bbox": {
        "south_latitude": 21.87,
        "west_longitude": 119.25,
        "north_latitude": 25.34,
        "east_longitude": 122.06
    },
    "id": {
        "authority": "EPSG",
        "code": 3821
    }
}

Definition: GeoServer

3821=GEOGCS["TWD67",DATUM["Taiwan_Datum_1967",SPHEROID["GRS 1967 Modified",6378160,298.25,AUTHORITY["EPSG","7050"]],AUTHORITY["EPSG","1025"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","3821"]]

Definition: MapServer - MAPfile

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

Definition: Mapnik

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

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 3821, 'EPSG', 3821, '+proj=longlat +ellps=aust_SA +no_defs +type=crs', 'GEOGCS["TWD67",DATUM["Taiwan_Datum_1967",SPHEROID["GRS 1967 Modified",6378160,298.25,AUTHORITY["EPSG","7050"]],AUTHORITY["EPSG","1025"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","3821"]]');