Unit: degree (supplier to define representation)
Geodetic CRS: TWD97
Datum: Taiwan Datum 1997
Ellipsoid: GRS 1980
Prime meridian: Greenwich
Data source: EPSG
Information source: OGP. See 3D CRS for original information source.
Revision date: 2008-08-11
Scope: Horizontal component of 3D system.
Area of use: Taiwan, Republic of China - onshore and offshore - Taiwan Island, Penghu (Pescadores) Islands.
Coordinate system: Ellipsoidal 2D CS. Axes: latitude, longitude. Orientations: north, east. UoM: degree
Center coordinates
118.97 22.16
WGS84 bounds:
114.32 17.36
123.61 26.96
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.4/projjson.schema.json", "type": "GeographicCRS", "name": "TWD97", "datum": { "type": "GeodeticReferenceFrame", "name": "Taiwan Datum 1997", "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" } ] }, "scope": "Horizontal component of 3D system.", "area": "Taiwan, Republic of China - onshore and offshore - Taiwan Island, Penghu (Pescadores) Islands.", "bbox": { "south_latitude": 17.36, "west_longitude": 114.32, "north_latitude": 26.96, "east_longitude": 123.61 }, "id": { "authority": "EPSG", "code": 3824 } }
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>
Definition: SQL (PostGIS)
INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 3824, 'EPSG', 3824, '+proj=longlat +ellps=GRS80 +no_defs +type=crs', 'GEOGCS["TWD97",DATUM["Taiwan_Datum_1997",SPHEROID["GRS 1980",6378137,298.257222101]],PRIMEM["Greenwich",0],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","3824"]]');
Definition: OGC WKT 2 (2019)
GEOGCRS["TWD97",DATUM["Taiwan Datum 1997",ELLIPSOID["GRS 1980",6378137,298.257222101,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["Horizontal component of 3D system."],AREA["Taiwan, Republic of China - onshore and offshore - Taiwan Island, Penghu (Pescadores) Islands."],BBOX[17.36,114.32,26.96,123.61]],ID["EPSG",3824]]