EPSG:3826 — TWD97 / TM2 zone 121

Projected · Taiwan - 120°E to 122°E

Export Formats

OGC WKT

PROJCS[
    "TWD97 / TM2 zone 121",
    GEOGCS[
        "TWD97",
        DATUM[
            "Taiwan_Datum_1997",
            SPHEROID["GRS 1980",6378137,298.257222101],
            TOWGS84[0,0,0,0,0,0,0]
        ],
        PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","3824"]
    ],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",0],
    PARAMETER["central_meridian",121],
    PARAMETER["scale_factor",0.9999],
    PARAMETER["false_easting",250000],
    PARAMETER["false_northing",0],
    UNIT["metre",1,AUTHORITY["EPSG","9001"]],
    AXIS["Easting",EAST],
    AXIS["Northing",NORTH],
    AUTHORITY["EPSG","3826"]
]

WKT2

PROJCRS[
    "TWD97 / TM2 zone 121",
    BASEGEOGCRS[
        "TWD97",
        DATUM[
            "Taiwan Datum 1997",
            ELLIPSOID[
                "GRS 1980",
                6378137,
                298.257222101,
                LENGTHUNIT["metre",1,ID["EPSG",9001]],
                ID["EPSG",7019]
            ],
            ID["EPSG",1026]
        ],
        ID["EPSG",3824]
    ],
    CONVERSION[
        "Taiwan 2-degree TM zone 121",
        METHOD["Transverse Mercator",ID["EPSG",9807]],
        PARAMETER[
            "Latitude of natural origin",
            0,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8801]
        ],
        PARAMETER[
            "Longitude of natural origin",
            121,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8802]
        ],
        PARAMETER[
            "Scale factor at natural origin",
            0.9999,
            SCALEUNIT["unity",1,ID["EPSG",9201]],
            ID["EPSG",8805]
        ],
        PARAMETER[
            "False easting",
            250000,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",8806]
        ],
        PARAMETER[
            "False northing",
            0,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",8807]
        ],
        ID["EPSG",3820]
    ],
    CS[Cartesian,2,ID["EPSG",4499]],
    AXIS["Easting (X)",east],
    AXIS["Northing (Y)",north],
    LENGTHUNIT["metre",1,ID["EPSG",9001]],
    ID["EPSG",3826]
]

PROJ.4

+proj=tmerc +lat_0=0 +lon_0=121 +k=0.9999 +x_0=250000 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs

Proj4js

How to add a projection to Proj4js? →

proj4.defs("EPSG:3826", "+proj=tmerc +lat_0=0 +lon_0=121 +k=0.9999 +x_0=250000 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs");

JSON

{
  "type": "CoordinateReferenceSystem",
  "code": 3826,
  "name": "TWD97 / TM2 zone 121",
  "kind": "projected",
  "area": "Taiwan - 120°E to 122°E",
  "unit": "metre",
  "bbox": [
    20.41,
    119.99,
    26.72,
    122.06
  ],
  "proj4": "+proj=tmerc +lat_0=0 +lon_0=121 +k=0.9999 +x_0=250000 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs"
}

PostGIS

How to add a projection to PostGIS? →

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (3826, 'EPSG', 3826, '+proj=tmerc +lat_0=0 +lon_0=121 +k=0.9999 +x_0=250000 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs', 'PROJCS["TWD97 / TM2 zone 121",GEOGCS["TWD97",DATUM["Taiwan_Datum_1997",SPHEROID["GRS 1980",6378137,298.257222101],TOWGS84[0,0,0,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","3824"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",121],PARAMETER["scale_factor",0.9999],PARAMETER["false_easting",250000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","3826"]]');

MapServer

How to add a projection to MapServer? →

PROJECTION
  "+proj=tmerc"
  "+lat_0=0"
  "+lon_0=121"
  "+k=0.9999"
  "+x_0=250000"
  "+y_0=0"
  "+ellps=GRS80"
  "+towgs84=0,0,0,0,0,0,0"
  "+units=m"
  "+no_defs"
  "+type=crs"
END

GeoServer

How to add a projection to GeoServer? →

3826=PROJCS["TWD97 / TM2 zone 121",GEOGCS["TWD97",DATUM["Taiwan_Datum_1997",SPHEROID["GRS 1980",6378137,298.257222101],TOWGS84[0,0,0,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","3824"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",121],PARAMETER["scale_factor",0.9999],PARAMETER["false_easting",250000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","3826"]]

Related Coordinate Systems

Available Transformations (1)

Transformation	Source → Target	Accuracy (m)
TWD67 / TM2 zone 121 to TWD97 / TM2 zone 121 (1)	3828 → 3826	7

Other CRS using Taiwan Datum 1997

Frequently Asked Questions

How do I add EPSG:3826 to GeoServer?

Add the following definition to your GeoServer configuration:

3826=PROJCS["TWD97 / TM2 zone 121",GEOGCS["TWD97",DATUM["Taiwan_Datum_1997",SPHEROID["GRS 1980",6378137,298.257222101],TOWGS84[0,0,0,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","3824"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",121],PARAMETER["scale_factor",0.9999],PARAMETER["false_easting",250000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","3826"]]

Read the full GeoServer guide →

How do I add EPSG:3826 to PostGIS?

Add the following definition to your PostGIS configuration:

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (3826, 'EPSG', 3826, '+proj=tmerc +lat_0=0 +lon_0=121 +k=0.9999 +x_0=250000 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs', 'PROJCS["TWD97 / TM2 zone 121",GEOGCS["TWD97",DATUM["Taiwan_Datum_1997",SPHEROID["GRS 1980",6378137,298.257222101],TOWGS84[0,0,0,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","3824"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",121],PARAMETER["scale_factor",0.9999],PARAMETER["false_easting",250000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","3826"]]');

Read the full PostGIS guide →

How do I add EPSG:3826 to MapServer?

Add the following definition to your MapServer configuration:

PROJECTION
  "+proj=tmerc"
  "+lat_0=0"
  "+lon_0=121"
  "+k=0.9999"
  "+x_0=250000"
  "+y_0=0"
  "+ellps=GRS80"
  "+towgs84=0,0,0,0,0,0,0"
  "+units=m"
  "+no_defs"
  "+type=crs"
END

Read the full MapServer guide →

How do I use EPSG:3826 with Proj4js?

Add the following definition to your Proj4js configuration:

proj4.defs("EPSG:3826", "+proj=tmerc +lat_0=0 +lon_0=121 +k=0.9999 +x_0=250000 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs");

Read the full Proj4js guide →

Type

Projected

Unit

metre

Geodetic CRS

TWD97

Datum

Taiwan Datum 1997

Ellipsoid

GRS 1980

Prime Meridian

Greenwich

Area of Use

Taiwan - 120°E to 122°E

Taiwan, Republic of China - between 120°E and 122°E, onshore and offshore - Taiwan Island.

Coordinate System

Cartesian 2D CS. Axes: easting, northing (X,Y). Orientations: east, north. UoM: m.

Center Coordinates

252552.02 2606849.70

Projected Bounds

2956748.94 144589.17355462.57 2257854.32

WGS84 Bounds

26.72 119.99122.06 20.41

Data Source

EPSG

Information Source

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

Revision Date

2008-08-11

Scope

Engineering survey, topographic mapping.

Remarks

Except for cadastral use, replaces TWD67 / TM2 zone 121 (CRS code 3828).

EPSG

3826

ESRI Equivalent

ESRI:102443