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Method: Geocentric translation by Grid Interpolation (IGN)
Grid Files: gr3df97a.txt
Remarks: May be emulated using NTv2 method - see tfm code 15958. Also used to transform between NTF and later realizations of RGF93.
Information source: Institut Geographique National (IGN) document NTG_88.pdf, "Grille de parametres de transformation de coordonnees". http://www.ign.fr
Revision date: 2022-01-24
Unit: degree
Geodetic CRS: NTF
Datum: Nouvelle Triangulation Francaise
Ellipsoid: Clarke 1880 (IGN)
Prime meridian: Greenwich
Data source: EPSG
Information source: OGP
Revision date: 2002-11-22
Scope: Geodesy.
Remarks: See CRS code 4275 for recommended coordinate axis representation for the human interface.
Area of use: France - onshore.
Coordinate system: Ellipsoidal 2D CS. Axes: latitude, longitude. Orientations: north, east. UoM: dec deg
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