EPSG:25231 — Lome / UTM zone 31N

Projected · Togo

Export Formats

OGC WKT

PROJCS[
    "Lome / UTM zone 31N",
    GEOGCS[
        "Lome",
        DATUM[
            "Lome",
            SPHEROID[
                "Clarke 1880 (IGN)",
                6378249.2,
                293.466021293627,
                AUTHORITY["EPSG","7011"]
            ],
            AUTHORITY["EPSG","6252"]
        ],
        PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4252"]
    ],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",0],
    PARAMETER["central_meridian",3],
    PARAMETER["scale_factor",0.9996],
    PARAMETER["false_easting",500000],
    PARAMETER["false_northing",0],
    UNIT["metre",1,AUTHORITY["EPSG","9001"]],
    AXIS["Easting",EAST],
    AXIS["Northing",NORTH],
    AUTHORITY["EPSG","25231"]
]

WKT2

PROJCRS[
    "Lome / UTM zone 31N",
    BASEGEOGCRS[
        "Lome",
        DATUM[
            "Lome",
            ELLIPSOID[
                "Clarke 1880 (IGN)",
                6378249.2,
                293.466021293627,
                LENGTHUNIT["metre",1,ID["EPSG",9001]],
                ID["EPSG",7011]
            ],
            ID["EPSG",6252]
        ],
        ID["EPSG",4252]
    ],
    CONVERSION[
        "UTM zone 31N",
        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",
            3,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8802]
        ],
        PARAMETER[
            "Scale factor at natural origin",
            0.9996,
            SCALEUNIT["unity",1,ID["EPSG",9201]],
            ID["EPSG",8805]
        ],
        PARAMETER[
            "False easting",
            500000,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",8806]
        ],
        PARAMETER[
            "False northing",
            0,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",8807]
        ],
        ID["EPSG",16031]
    ],
    CS[Cartesian,2,ID["EPSG",4400]],
    AXIS["Easting (E)",east],
    AXIS["Northing (N)",north],
    LENGTHUNIT["metre",1,ID["EPSG",9001]],
    ID["EPSG",25231]
]

PROJ.4

+proj=utm +zone=31 +ellps=clrk80ign +units=m +no_defs +type=crs

Proj4js

How to add a projection to Proj4js? →

proj4.defs("EPSG:25231", "+proj=utm +zone=31 +ellps=clrk80ign +units=m +no_defs +type=crs");

JSON

{
  "type": "CoordinateReferenceSystem",
  "code": 25231,
  "name": "Lome / UTM zone 31N",
  "kind": "projected",
  "area": "Togo",
  "unit": "metre",
  "bbox": [
    2.91,
    -0.15,
    11.14,
    2.42
  ],
  "proj4": "+proj=utm +zone=31 +ellps=clrk80ign +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 (25231, 'EPSG', 25231, '+proj=utm +zone=31 +ellps=clrk80ign +units=m +no_defs +type=crs', 'PROJCS["Lome / UTM zone 31N",GEOGCS["Lome",DATUM["Lome",SPHEROID["Clarke 1880 (IGN)",6378249.2,293.466021293627,AUTHORITY["EPSG","7011"]],AUTHORITY["EPSG","6252"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4252"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",3],PARAMETER["scale_factor",0.9996],PARAMETER["false_easting",500000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","25231"]]');

MapServer

How to add a projection to MapServer? →

PROJECTION
  "+proj=utm"
  "+zone=31"
  "+ellps=clrk80ign"
  "+units=m"
  "+no_defs"
  "+type=crs"
END

GeoServer

How to add a projection to GeoServer? →

25231=PROJCS["Lome / UTM zone 31N",GEOGCS["Lome",DATUM["Lome",SPHEROID["Clarke 1880 (IGN)",6378249.2,293.466021293627,AUTHORITY["EPSG","7011"]],AUTHORITY["EPSG","6252"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4252"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",3],PARAMETER["scale_factor",0.9996],PARAMETER["false_easting",500000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","25231"]]

Other CRS for TG

Other CRS using Lome

Frequently Asked Questions

How do I add EPSG:25231 to GeoServer?

Add the following definition to your GeoServer configuration:

25231=PROJCS["Lome / UTM zone 31N",GEOGCS["Lome",DATUM["Lome",SPHEROID["Clarke 1880 (IGN)",6378249.2,293.466021293627,AUTHORITY["EPSG","7011"]],AUTHORITY["EPSG","6252"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4252"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",3],PARAMETER["scale_factor",0.9996],PARAMETER["false_easting",500000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","25231"]]

Read the full GeoServer guide →

How do I add EPSG:25231 to PostGIS?

Add the following definition to your PostGIS configuration:

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (25231, 'EPSG', 25231, '+proj=utm +zone=31 +ellps=clrk80ign +units=m +no_defs +type=crs', 'PROJCS["Lome / UTM zone 31N",GEOGCS["Lome",DATUM["Lome",SPHEROID["Clarke 1880 (IGN)",6378249.2,293.466021293627,AUTHORITY["EPSG","7011"]],AUTHORITY["EPSG","6252"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4252"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",3],PARAMETER["scale_factor",0.9996],PARAMETER["false_easting",500000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","25231"]]');

Read the full PostGIS guide →

How do I add EPSG:25231 to MapServer?

Add the following definition to your MapServer configuration:

PROJECTION
  "+proj=utm"
  "+zone=31"
  "+ellps=clrk80ign"
  "+units=m"
  "+no_defs"
  "+type=crs"
END

Read the full MapServer guide →

How do I use EPSG:25231 with Proj4js?

Add the following definition to your Proj4js configuration:

proj4.defs("EPSG:25231", "+proj=utm +zone=31 +ellps=clrk80ign +units=m +no_defs +type=crs");

Read the full Proj4js guide →