EPSG:CODE

NTF (Paris) to ETRS89-FRA [RGF93 v1] (2)

EPSG:4807 → EPSG:4171

Coordinate Reference Systems

Source CRS
EPSG:4807
NTF (Paris)
Geographic 2D
Target CRS
EPSG:4171
ETRS89-FRA [RGF93 v1]
Geographic 2D

Remarks

Second step is an emulation (using the NTv2 method) of the geocentric interpolation method described in CT code 9337. Note that the grid file parameters are of opposite sign.