EPSG systems

EPSG:4275 NTF

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

System record
CodeEPSG:4275
NameNTF
TypeGeographic system
Area of use France - onshore - mainland and Corsica
Bounds W -4,87° · S 41,31° · E 9,63° · N 51,14°
Countries France
DatumNouvelle Triangulation Francaise
Ellipsoid Clarke 1880 (IGN) a = 6378249.2 m · 1/f = 293.466021294
Unit degree (Lat north, Lon east)
Transformation to WGS 84 NTF to WGS 84 (1) (EPSG:1193) — accuracy 2 m
ScopeGeodesy.

proj4 definition

+proj=longlat +ellps=clrk80ign +towgs84=-168,-60,320 +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:4275.

WKT (ESRI format, the .prj content)

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

All systems — France

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