EPSG systems

EPSG:27564 NTF (Paris) / Lambert Corse

Projected system (Lambert Conic Conformal (1SP)) in use: France - Corsica onshore. The full definition below, and conversion in one click.

System record
CodeEPSG:27564
NameNTF (Paris) / Lambert Corse
TypeProjected system — Lambert Conic Conformal (1SP)
Area of use France - Corsica onshore
Bounds W 8,50° · S 41,31° · E 9,63° · N 43,07°
Countries France
DatumNouvelle Triangulation Francaise (Paris)
Ellipsoid Clarke 1880 (IGN) a = 6378249.2 m · 1/f = 293.466021294
Prime meridianParis 2.5969213 grad
Base geographic system EPSG:4807 — NTF (Paris)
Unit metre (X east, Y north)
Transformation to WGS 84 NTF to WGS 84 (1) (EPSG:1193) — accuracy 2 m
ScopeEngineering survey, topographic mapping.
In CarteBuilt-in grid (code F4), with the reference cities of the guide.

Projection parameters

ParameterValueUnit
Latitude of natural origin46.85grad
Longitude of natural origin0grad
Scale factor at natural origin0.99994471unity
False easting234.358metre
False northing185861.369metre

proj4 definition

+proj=lcc +lat_1=42.165 +lat_0=42.165 +lon_0=0 +k_0=0.99994471 +x_0=234.358 +y_0=185861.369 +a=6378249.2 +b=6356515 +towgs84=-168,-60,320,0,0,0,0 +pm=paris +units=m +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:27564.

WKT (ESRI format, the .prj content)

PROJCS["NTF_Paris_Lambert_Corse",GEOGCS["GCS_NTF_Paris",DATUM["Nouvelle_Triangulation_Francaise_(Paris)",SPHEROID["Clarke_1880_IGN",6378249.2,293.466021293627]],PRIMEM["Paris",2.33722917],UNIT["Grad",0.0157079632679489]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["False_Easting",234.358],PARAMETER["False_Northing",185861.369],PARAMETER["Central_Meridian",0.0],PARAMETER["Standard_Parallel_1",46.85],PARAMETER["Scale_Factor",0.99994471],PARAMETER["Latitude_Of_Origin",46.85],UNIT["Meter",1.0]]

All systems — France

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