EPSG:CODE

EPSG:4256 — Mahe 1971

Geographic 2D · Seychelles - Mahe Island

Export Formats

OGC WKT
GEOGCS[
    "Mahe 1971",
    DATUM[
        "Mahe_1971",
        SPHEROID["Clarke 1880 (RGS)",6378249.145,293.465],
        TOWGS84[41,-220,-134,0,0,0,0]
    ],
    PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],
    UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],
    AUTHORITY["EPSG","4256"]
]

Related Coordinate Systems

Available Transformations (1)

Transformation Source → Target Accuracy (m)
Mahe 1971 to WGS 84 (1)
4256 → 4326 44

Frequently Asked Questions

How do I add EPSG:4256 to GeoServer?

Add the following definition to your GeoServer configuration: 

4256=GEOGCS["Mahe 1971",DATUM["Mahe_1971",SPHEROID["Clarke 1880 (RGS)",6378249.145,293.465],TOWGS84[41,-220,-134,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4256"]]
Read the full GeoServer guide →

How do I add EPSG:4256 to PostGIS?

Add the following definition to your PostGIS configuration: 

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (4256, 'EPSG', 4256, '+proj=longlat +a=6378249.145 +rf=293.465 +towgs84=41,-220,-134,0,0,0,0 +no_defs +type=crs', 'GEOGCS["Mahe 1971",DATUM["Mahe_1971",SPHEROID["Clarke 1880 (RGS)",6378249.145,293.465],TOWGS84[41,-220,-134,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4256"]]');
Read the full PostGIS guide →

How do I add EPSG:4256 to MapServer?

Add the following definition to your MapServer configuration: 

PROJECTION
  "+proj=longlat"
  "+a=6378249.145"
  "+rf=293.465"
  "+towgs84=41,-220,-134,0,0,0,0"
  "+no_defs"
  "+type=crs"
END
Read the full MapServer guide →

How do I use EPSG:4256 with Proj4js?

Add the following definition to your Proj4js configuration: 

proj4.defs("EPSG:4256", "+proj=longlat +a=6378249.145 +rf=293.465 +towgs84=41,-220,-134,0,0,0,0 +no_defs +type=crs");
Read the full Proj4js guide →