EPSG:4231 — ED87

Geographic 2D · Europe - west

Export Formats

OGC WKT

GEOGCS[
    "ED87",
    DATUM[
        "European_Datum_1987",
        SPHEROID["International 1924",6378388,297],
        TOWGS84[-83.11,-97.38,-117.22,0.0276,-0.2167,0.2147,0.1218]
    ],
    PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],
    UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],
    AUTHORITY["EPSG","4231"]
]

WKT2

GEOGCRS[
    "ED87",
    DATUM[
        "European Datum 1987",
        ELLIPSOID[
            "International 1924",
            6378388,
            297,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",7022]
        ],
        ID["EPSG",6231]
    ],
    CS[ellipsoidal,2,ID["EPSG",6422]],
    AXIS["Geodetic latitude (Lat)",north],
    AXIS["Geodetic longitude (Lon)",east],
    ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
    ID["EPSG",4231]
]

PROJ.4

+proj=longlat +ellps=intl +towgs84=-83.11,-97.38,-117.22,0.0276,-0.2167,0.2147,0.1218 +no_defs +type=crs

Proj4js

How to add a projection to Proj4js? →

proj4.defs("EPSG:4231", "+proj=longlat +ellps=intl +towgs84=-83.11,-97.38,-117.22,0.0276,-0.2167,0.2147,0.1218 +no_defs +type=crs");

JSON

{
  "type": "CoordinateReferenceSystem",
  "code": 4231,
  "name": "ED87",
  "kind": "geographic 2D",
  "area": "Europe - west",
  "unit": "degree (supplier to define representation)",
  "bbox": [
    34.88,
    -10.56,
    84.73,
    38.01
  ],
  "proj4": "+proj=longlat +ellps=intl +towgs84=-83.11,-97.38,-117.22,0.0276,-0.2167,0.2147,0.1218 +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 (4231, 'EPSG', 4231, '+proj=longlat +ellps=intl +towgs84=-83.11,-97.38,-117.22,0.0276,-0.2167,0.2147,0.1218 +no_defs +type=crs', 'GEOGCS["ED87",DATUM["European_Datum_1987",SPHEROID["International 1924",6378388,297],TOWGS84[-83.11,-97.38,-117.22,0.0276,-0.2167,0.2147,0.1218]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4231"]]');

MapServer

How to add a projection to MapServer? →

PROJECTION
  "+proj=longlat"
  "+ellps=intl"
  "+towgs84=-83.11,-97.38,-117.22,0.0276,-0.2167,0.2147,0.1218"
  "+no_defs"
  "+type=crs"
END

GeoServer

How to add a projection to GeoServer? →

4231=GEOGCS["ED87",DATUM["European_Datum_1987",SPHEROID["International 1924",6378388,297],TOWGS84[-83.11,-97.38,-117.22,0.0276,-0.2167,0.2147,0.1218]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4231"]]

Related Coordinate Systems

Available Transformations (8)

Transformation	Source → Target	Accuracy (m)
ED87 to ETRS89 (1)	4231 → 4258	0.3
ED87 to WGS 84 (1)	4231 → 4326	0.8
ED50 to ED87 (2)	4230 → 4231	1
ED87 to WGS 84 (2)	4231 → 4326	1
ED50 to ED87 (1)	4230 → 4231	1
ED50 to ED87 (1) Deprecated	4230 → 4231	—
ED50 to ED87 (1) Deprecated	4230 → 4231	1
ED87 to WGS 84 (2) Deprecated	4231 → 4326	1

Frequently Asked Questions

How do I add EPSG:4231 to GeoServer?

Add the following definition to your GeoServer configuration:

4231=GEOGCS["ED87",DATUM["European_Datum_1987",SPHEROID["International 1924",6378388,297],TOWGS84[-83.11,-97.38,-117.22,0.0276,-0.2167,0.2147,0.1218]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4231"]]

Read the full GeoServer guide →

How do I add EPSG:4231 to PostGIS?

Add the following definition to your PostGIS configuration:

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (4231, 'EPSG', 4231, '+proj=longlat +ellps=intl +towgs84=-83.11,-97.38,-117.22,0.0276,-0.2167,0.2147,0.1218 +no_defs +type=crs', 'GEOGCS["ED87",DATUM["European_Datum_1987",SPHEROID["International 1924",6378388,297],TOWGS84[-83.11,-97.38,-117.22,0.0276,-0.2167,0.2147,0.1218]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4231"]]');

Read the full PostGIS guide →

How do I add EPSG:4231 to MapServer?

Add the following definition to your MapServer configuration:

PROJECTION
  "+proj=longlat"
  "+ellps=intl"
  "+towgs84=-83.11,-97.38,-117.22,0.0276,-0.2167,0.2147,0.1218"
  "+no_defs"
  "+type=crs"
END

Read the full MapServer guide →

How do I use EPSG:4231 with Proj4js?

Add the following definition to your Proj4js configuration:

proj4.defs("EPSG:4231", "+proj=longlat +ellps=intl +towgs84=-83.11,-97.38,-117.22,0.0276,-0.2167,0.2147,0.1218 +no_defs +type=crs");

Read the full Proj4js guide →