NTv2_0.gsb
Approximation at the +/- 1m level assuming that NAD83 is equivalent to WGS 84.
OGP
1998-11-11
Geodesy.
See CRS code 4267 for recommended coordinate axis representation for the human interface.
Ellipsoidal 2D CS. Axes: latitude, longitude. Orientations: north, east. UoM: dec deg