EPSG:4712 — Ascension Island 1958

Geographic 2D · St Helena - Ascension Island

Export Formats

OGC WKT

GEOGCS[
    "Ascension Island 1958",
    DATUM[
        "Ascension_Island_1958",
        SPHEROID["International 1924",6378388,297],
        TOWGS84[-205,107,53,0,0,0,0]
    ],
    PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],
    UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],
    AUTHORITY["EPSG","4712"]
]

WKT2

GEOGCRS[
    "Ascension Island 1958",
    DATUM[
        "Ascension Island 1958",
        ELLIPSOID[
            "International 1924",
            6378388,
            297,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",7022]
        ],
        ID["EPSG",6712]
    ],
    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",4712]
]

PROJ.4

+proj=longlat +ellps=intl +towgs84=-205,107,53,0,0,0,0 +no_defs +type=crs

Proj4js

How to add a projection to Proj4js? →

proj4.defs("EPSG:4712", "+proj=longlat +ellps=intl +towgs84=-205,107,53,0,0,0,0 +no_defs +type=crs");

JSON

{
  "type": "CoordinateReferenceSystem",
  "code": 4712,
  "name": "Ascension Island 1958",
  "kind": "geographic 2D",
  "area": "St Helena - Ascension Island",
  "unit": "degree (supplier to define representation)",
  "bbox": [
    -8.03,
    -14.46,
    -7.83,
    -14.24
  ],
  "proj4": "+proj=longlat +ellps=intl +towgs84=-205,107,53,0,0,0,0 +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 (4712, 'EPSG', 4712, '+proj=longlat +ellps=intl +towgs84=-205,107,53,0,0,0,0 +no_defs +type=crs', 'GEOGCS["Ascension Island 1958",DATUM["Ascension_Island_1958",SPHEROID["International 1924",6378388,297],TOWGS84[-205,107,53,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4712"]]');

MapServer

How to add a projection to MapServer? →

PROJECTION
  "+proj=longlat"
  "+ellps=intl"
  "+towgs84=-205,107,53,0,0,0,0"
  "+no_defs"
  "+type=crs"
END

GeoServer

How to add a projection to GeoServer? →

4712=GEOGCS["Ascension Island 1958",DATUM["Ascension_Island_1958",SPHEROID["International 1924",6378388,297],TOWGS84[-205,107,53,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4712"]]

Related Coordinate Systems

Available Transformations (1)

Transformation	Source → Target	Accuracy (m)
Ascension Island 1958 to WGS 84 (1)	4712 → 4326	44

Frequently Asked Questions

How do I add EPSG:4712 to GeoServer?

Add the following definition to your GeoServer configuration:

4712=GEOGCS["Ascension Island 1958",DATUM["Ascension_Island_1958",SPHEROID["International 1924",6378388,297],TOWGS84[-205,107,53,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4712"]]

Read the full GeoServer guide →

How do I add EPSG:4712 to PostGIS?

Add the following definition to your PostGIS configuration:

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (4712, 'EPSG', 4712, '+proj=longlat +ellps=intl +towgs84=-205,107,53,0,0,0,0 +no_defs +type=crs', 'GEOGCS["Ascension Island 1958",DATUM["Ascension_Island_1958",SPHEROID["International 1924",6378388,297],TOWGS84[-205,107,53,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4712"]]');

Read the full PostGIS guide →

How do I add EPSG:4712 to MapServer?

Add the following definition to your MapServer configuration:

PROJECTION
  "+proj=longlat"
  "+ellps=intl"
  "+towgs84=-205,107,53,0,0,0,0"
  "+no_defs"
  "+type=crs"
END

Read the full MapServer guide →

How do I use EPSG:4712 with Proj4js?

Add the following definition to your Proj4js configuration:

proj4.defs("EPSG:4712", "+proj=longlat +ellps=intl +towgs84=-205,107,53,0,0,0,0 +no_defs +type=crs");

Read the full Proj4js guide →