EPSG systems

EPSG:4679 Jouik 1961

Geographic system in latitude and longitude, in use: Mauritania - north coast. Datum, ellipsoid and transformation to WGS 84 below.

System record
CodeEPSG:4679
NameJouik 1961
TypeGeographic system
Area of use Mauritania - north coast
Mauritania - coastal area north of Cape Timiris.
Bounds W -17,08° · S 19,37° · E -15,88° · N 21,34°
Countries Mauritania
DatumJouik 1961
Ellipsoid Clarke 1880 (RGS) a = 6378249.145 m · 1/f = 293.465
Unit degree (Lat north, Lon east)
Transformation to WGS 84 Jouik 1961 to WGS 84 (1) (EPSG:15870) — accuracy 1 m
ScopeHydrography and nautical charting.

proj4 definition

+proj=longlat +a=6378249.145 +rf=293.465 +towgs84=-80.01,253.26,291.19 +no_defs

Paste it into QGIS, proj4js, PostGIS (spatial_ref_sys) or GDAL. +towgs84 carries the EPSG transformation to WGS 84; the official code stays EPSG:4679.

WKT (ESRI format, the .prj content)

GEOGCS["GCS_Jouik_1961",DATUM["D_Jouik_1961",SPHEROID["Clarke_1880_RGS",6378249.145,293.465]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]]

All systems — Mauritania

Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.