[Proj] OSTN02 in NTv2 format for OSGB36<-->ETRS89 datum conversions

Paul Kelly paul-grass at stjohnspoint.co.uk
Mon Nov 13 07:55:20 EST 2006

On Mon, 13 Nov 2006, Paul Kelly wrote:

> Both the files have a resolution of 1 arc-minute of latitude and 40 
> arc-seconds of longitude and are about 4 megabytes in size. This corresponds 
> roughly to the 1 kilometre grid used in OSTN02, but I have a feeling it may

Oops - that should have been 40 seconds of latitude and 60 seconds of 
longitude. Have put updated versions of the two files in place now. I 
don't expect it to make a huge difference though, perhaps some fractions 
of a centimetre depending on the exact location of the test point.

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