EPSG systems

EPSG:4315 Conakry 1905

Geographic system in latitude and longitude, in use: Guinea - onshore. Datum, ellipsoid and transformation to WGS 84 below.

System record
CodeEPSG:4315
NameConakry 1905
TypeGeographic system
Area of use Guinea - onshore
Bounds W -15,13° · S 7,19° · E -7,65° · N 12,68°
Countries Guinea
DatumConakry 1905
Ellipsoid Clarke 1880 (IGN) a = 6378249.2 m · 1/f = 293.466021294
Unit degree (Lat north, Lon east)
Transformation to WGS 84 Conakry 1905 to WGS 84 (1) (EPSG:1517) — accuracy 30 m
ScopeGeodesy.

proj4 definition

+proj=longlat +ellps=clrk80ign +towgs84=-23,259,-9 +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:4315.

WKT (ESRI format, the .prj content)

GEOGCS["GCS_Conakry_1905",DATUM["D_Conakry_1905",SPHEROID["Clarke_1880_IGN",6378249.2,293.466021293627]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]]

All systems — Guinea

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