[Talk-GB] OS National Grid References

Tom Hughes tom at compton.nu
Tue Jan 22 17:10:17 UTC 2019

On 22/01/2019 16:20, Brian Prangle wrote:

> Are these covered by copyright? I've found conflicting opinions:

The issue is not a grid ref itself as such, but the data tables
that are necessary to do a fully accurate conversion between OSGB
and WG84 (or any other coordinate system).

There is a simplified algorithmic transformation but a fully
accurate conversion requires the OSTN02 data.

I'm not sure what the current status is but they certainly used
to claim various IP rights over it.


Tom Hughes (tom at compton.nu)

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