EPSG systems

EPSG:4620 Point 58

Geographic system in latitude and longitude, in use: Africa - 12th parallel N. Datum, ellipsoid and transformation to WGS 84 below.

System record
CodeEPSG:4620
NamePoint 58
TypeGeographic system
Area of use Africa - 12th parallel N
Senegal - central, Mali - southwest, Burkina Faso - central, Niger - southwest, Nigeria - north, Chad - central. All in proximity to the parallel of latitude of 12°N.
Bounds W -17,19° · S 10,26° · E 30,42° · N 15,70°
Countries Senegal
DatumPoint 58
Ellipsoid Clarke 1880 (RGS) a = 6378249.145 m · 1/f = 293.465
Unit degree (Lat north, Lon east)
Transformation to WGS 84 Point 58 to WGS 84 (1) (EPSG:1880) — accuracy 44 m
ScopeGeodesy.

proj4 definition

+proj=longlat +a=6378249.145 +rf=293.465 +towgs84=-106,-129,165 +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:4620.

WKT (ESRI format, the .prj content)

GEOGCS["GCS_Point_58",DATUM["D_Point_58",SPHEROID["Clarke_1880_RGS",6378249.145,293.465]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]]

All systems — Senegal

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