EPSG:4261 — Merchich

Geographic 2D · Africa - Morocco and Western Sahara - onshore

Export Formats

OGC WKT

GEOGCS[
    "Merchich",
    DATUM[
        "Merchich",
        SPHEROID["Clarke 1880 (IGN)",6378249.2,293.466021293627],
        TOWGS84[31,146,47,0,0,0,0]
    ],
    PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],
    UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],
    AUTHORITY["EPSG","4261"]
]

WKT2

GEOGCRS[
    "Merchich",
    DATUM[
        "Merchich",
        ELLIPSOID[
            "Clarke 1880 (IGN)",
            6378249.2,
            293.466021293627,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",7011]
        ],
        ID["EPSG",6261]
    ],
    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",4261]
]

PROJ.4

+proj=longlat +ellps=clrk80ign +towgs84=31,146,47,0,0,0,0 +no_defs +type=crs

Proj4js

How to add a projection to Proj4js? →

proj4.defs("EPSG:4261", "+proj=longlat +ellps=clrk80ign +towgs84=31,146,47,0,0,0,0 +no_defs +type=crs");

JSON

{
  "type": "CoordinateReferenceSystem",
  "code": 4261,
  "name": "Merchich",
  "kind": "geographic 2D",
  "area": "Africa - Morocco and Western Sahara - onshore",
  "unit": "degree (supplier to define representation)",
  "bbox": [
    20.71,
    -17.16,
    35.97,
    -1.01
  ],
  "proj4": "+proj=longlat +ellps=clrk80ign +towgs84=31,146,47,0,0,0,0 +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 (4261, 'EPSG', 4261, '+proj=longlat +ellps=clrk80ign +towgs84=31,146,47,0,0,0,0 +no_defs +type=crs', 'GEOGCS["Merchich",DATUM["Merchich",SPHEROID["Clarke 1880 (IGN)",6378249.2,293.466021293627],TOWGS84[31,146,47,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4261"]]');

MapServer

How to add a projection to MapServer? →

PROJECTION
  "+proj=longlat"
  "+ellps=clrk80ign"
  "+towgs84=31,146,47,0,0,0,0"
  "+no_defs"
  "+type=crs"
END

GeoServer

How to add a projection to GeoServer? →

4261=GEOGCS["Merchich",DATUM["Merchich",SPHEROID["Clarke 1880 (IGN)",6378249.2,293.466021293627],TOWGS84[31,146,47,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4261"]]

Related Coordinate Systems

Available Transformations (1)

Transformation	Source → Target	Accuracy (m)
Merchich to WGS 84 (1)	4261 → 4326	7

Other CRS using Merchich

Frequently Asked Questions

How do I add EPSG:4261 to GeoServer?

Add the following definition to your GeoServer configuration:

4261=GEOGCS["Merchich",DATUM["Merchich",SPHEROID["Clarke 1880 (IGN)",6378249.2,293.466021293627],TOWGS84[31,146,47,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4261"]]

Read the full GeoServer guide →

How do I add EPSG:4261 to PostGIS?

Add the following definition to your PostGIS configuration:

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (4261, 'EPSG', 4261, '+proj=longlat +ellps=clrk80ign +towgs84=31,146,47,0,0,0,0 +no_defs +type=crs', 'GEOGCS["Merchich",DATUM["Merchich",SPHEROID["Clarke 1880 (IGN)",6378249.2,293.466021293627],TOWGS84[31,146,47,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4261"]]');

Read the full PostGIS guide →

How do I add EPSG:4261 to MapServer?

Add the following definition to your MapServer configuration:

PROJECTION
  "+proj=longlat"
  "+ellps=clrk80ign"
  "+towgs84=31,146,47,0,0,0,0"
  "+no_defs"
  "+type=crs"
END

Read the full MapServer guide →

How do I use EPSG:4261 with Proj4js?

Add the following definition to your Proj4js configuration:

proj4.defs("EPSG:4261", "+proj=longlat +ellps=clrk80ign +towgs84=31,146,47,0,0,0,0 +no_defs +type=crs");

Read the full Proj4js guide →