On Wed, Dec 01, 2004 at 12:55:51PM +0000, Kake L Pugh wrote:
Now as for which ellipsoid you should choose being as your guide is worldwide - your guess is as good as mine.
If you check with the local Ordnance Survey types, they'll tell you what reference ellipsoid is in vogue for their area. e.g. The Irish Grid uses a Modified Airy Ellipsoid http://www.osi.ie/gps/overview/irishgrid.asp
Stephen