EPSG:4275

NTF

Available transformations
to EPSG:4171
EPSG:4171 - RGF93 v1

Selected transformation

Name: NTF to RGF93 (1)

Method: France geocentric interpolation

Remarks: May be used for transformation of NTF to/from ETR89 and WGS 84 as RGF93 may be considered equivalent to ETRS89 or WGS 84 within the accuracy of the transformation. See tfm codes 1054 and 15939. May be emulated using NTv2 method - see tfm code 15958.

Information source: Institut Geographique National (IGN) document NTG_88.pdf, "Grille de parametres de transformation de coordonnees". http://www.ign.fr

Revision date: 2010-03-30

Attributes

Unit: degree (supplier to define representation)

Geodetic CRS: NTF

Datum: Nouvelle Triangulation Francaise

Ellipsoid: Clarke 1880 (IGN)

Prime meridian: Greenwich

Data source: EPSG

Revision date: 2010-03-30

Scope: Geodesy.

Area of use: France - onshore - mainland and Corsica.

Coordinate system: Ellipsoidal 2D CS. Axes: latitude, longitude. Orientations: north, east. UoM: degree

Covered area powered by MapTiler MapTiler logo
SimpleMap

Center coordinates
2.38 46.23

WGS84 bounds:
-4.87 41.31
9.63 51.14

France - onshore - mainland and Corsica.
MapTiler banner

Definition: OGC Well Known Text

GEOGCS["NTF",
    DATUM["Nouvelle_Triangulation_Francaise",
        SPHEROID["Clarke 1880 (IGN)",6378249.2,293.466021293627,
            AUTHORITY["EPSG","7011"]],
        AUTHORITY["EPSG","6275"]],
    PRIMEM["Greenwich",0,
        AUTHORITY["EPSG","8901"]],
    UNIT["degree",0.0174532925199433,
        AUTHORITY["EPSG","9122"]],
    AUTHORITY["EPSG","4275"]]

Definition: OGC Well Known Text 2 (2019)

GEOGCRS["NTF",
    DATUM["Nouvelle Triangulation Francaise",
        ELLIPSOID["Clarke 1880 (IGN)",6378249.2,293.466021293627,
            LENGTHUNIT["metre",1]]],
    PRIMEM["Greenwich",0,
        ANGLEUNIT["degree",0.0174532925199433]],
    CS[ellipsoidal,2],
        AXIS["geodetic latitude (Lat)",north,
            ORDER[1],
            ANGLEUNIT["degree",0.0174532925199433]],
        AXIS["geodetic longitude (Lon)",east,
            ORDER[2],
            ANGLEUNIT["degree",0.0174532925199433]],
    USAGE[
        SCOPE["Geodesy."],
        AREA["France - onshore - mainland and Corsica."],
        BBOX[41.31,-4.87,51.14,9.63]],
    ID["EPSG",4275]]

Definition: ESRI Well Known Text

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

Definition: PROJ.4

+proj=longlat +ellps=clrk80ign +no_defs +type=crs

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:4275","+proj=longlat +ellps=clrk80ign +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "GeographicCRS",
    "name": "NTF",
    "datum": {
        "type": "GeodeticReferenceFrame",
        "name": "Nouvelle Triangulation Francaise",
        "ellipsoid": {
            "name": "Clarke 1880 (IGN)",
            "semi_major_axis": 6378249.2,
            "semi_minor_axis": 6356515
        }
    },
    "coordinate_system": {
        "subtype": "ellipsoidal",
        "axis": [
            {
                "name": "Geodetic latitude",
                "abbreviation": "Lat",
                "direction": "north",
                "unit": "degree"
            },
            {
                "name": "Geodetic longitude",
                "abbreviation": "Lon",
                "direction": "east",
                "unit": "degree"
            }
        ]
    },
    "scope": "Geodesy.",
    "area": "France - onshore - mainland and Corsica.",
    "bbox": {
        "south_latitude": 41.31,
        "west_longitude": -4.87,
        "north_latitude": 51.14,
        "east_longitude": 9.63
    },
    "id": {
        "authority": "EPSG",
        "code": 4275
    }
}

Definition: GeoServer

4275=GEOGCS["NTF",DATUM["Nouvelle_Triangulation_Francaise",SPHEROID["Clarke 1880 (IGN)",6378249.2,293.466021293627,AUTHORITY["EPSG","7011"]],AUTHORITY["EPSG","6275"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4275"]]

Definition: MapServer - MAPfile

PROJECTION
	"proj=longlat"
	"ellps=clrk80ign"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=longlat +ellps=clrk80ign +no_defs +type=crs">
	<Layer srs="+proj=longlat +ellps=clrk80ign +no_defs +type=crs">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 4275, 'EPSG', 4275, '+proj=longlat +ellps=clrk80ign +no_defs +type=crs', 'GEOGCS["NTF",DATUM["Nouvelle_Triangulation_Francaise",SPHEROID["Clarke 1880 (IGN)",6378249.2,293.466021293627,AUTHORITY["EPSG","7011"]],AUTHORITY["EPSG","6275"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4275"]]');