Q: Where can I get the grid shift file needed for apltran for describing the Ordnance Survey National Grid projection?


The NTv2 file describing the OSTN02 transformation can be downloaded from the Ordnance Survey at:


This is required if you wish to re-project data into Ordnance Survey National Grid.

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Last modified 4 years ago Last modified on Jun 22, 2017 1:29:08 PM