Geocentric translation by Grid Interpolation (IGN)
gr3df97a.txt
May be emulated using NTv2 method - see tfm code 15958. Also used to transform between NTF and later realizations of RGF93.
Institut Geographique National (IGN) document NTG_88.pdf, "Grille de parametres de transformation de coordonnees". http://www.ign.fr
2022-01-24
Geodesy.
See CRS code 4275 for recommended coordinate axis representation for the human interface.
Ellipsoidal 2D CS. Axes: latitude, longitude. Orientations: north, east. UoM: dec deg