[Proj] NTv2 info

[Paul Kelly]

See the below link for an account of my own naive experimentations with 
the NTv2 format a few years ago - perhaps not of great interest though as 
I too could not find any adequate documentation for the binary version of 
the file and indeed used some Windows software (Australian) to create a 
binary version from the ASCII.

Link: <http://www.stjohnspoint.co.uk/gis/france.htm>