[Talk-GB] OS grid positions

[Derick Rethans]

On Mon, 9 May 2011, Tom Hughes wrote:

> On 09/05/11 13:17, Phil Endecott wrote:
> 
> > Good grief.  Are people seriously suggesting that the Ordnance Survey
> > "owns" the grid reference system to the extent that others cannot
> > convert between grid refs and other formats, or draw a grid over their
> > own maps?  That sounds like legal paranoia to me (and normally, I think
> > I'm more cautious than most about such issues).
> 
> See my other posting - the issue is that the "best" version of the
> mapping to OSGB relies on a large data table. It is not just an
> algorithmic conversion.

You can apparently use this data "for free" is long as there are 
copyright notices. Not something to use for OSM of course, but it's 
here:
http://www.ordnancesurvey.co.uk/oswebsite/gps/osnetfreeservices/furtherinfo/questdeveloper.html

cheers,
Derick