EPSG systems

EPSG:4304 Voirol 1875

Geographic system in latitude and longitude, in use: Algeria - north of 32°N. Datum, ellipsoid and transformation to WGS 84 below.

System record
CodeEPSG:4304
NameVoirol 1875
TypeGeographic system
Area of use Algeria - north of 32°N
Algeria - onshore north of 32°N.
Bounds W -2,95° · S 31,99° · E 9,09° · N 37,14°
Countries Algeria
DatumVoirol 1875
Ellipsoid Clarke 1880 (IGN) a = 6378249.2 m · 1/f = 293.466021294
Unit degree (Lat north, Lon east)
Transformation to WGS 84 Voirol 1875 to WGS 84 (1) (EPSG:1294) — accuracy 999 m
ScopeGeodesy.

proj4 definition

+proj=longlat +ellps=clrk80ign +towgs84=-73,-247,227 +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:4304.

WKT (ESRI format, the .prj content)

GEOGCS["GCS_Voirol_1875",DATUM["D_Voirol_1875",SPHEROID["Clarke_1880_IGN",6378249.2,293.466021293627]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]]

All systems — Algeria

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