Clive D.W. Feather wrote:
Andy McDonald said:
Europe/London: (!) latitude/longitude is incorrect - the current value is somewhere in the neighbourhood of Syon House in South-west London (http://en.wikipedia.org/wiki/Syon_House). Suggestions for a better value welcome.
The official centre of London - where distances are measured from - is variously either Charing Cross (51d30'30"N 0d07'31"W) or the Post Office (51d30'57"N 0d05'52"W).
It looks as though the zone.tab coordinates came from the mail I sent back in July 1994 about a piece in the Independent newspaper (which is in the europe file commentary). They aren't for Sion House, they are for the stone obelisk marking a pre-Greenwich meridian just across the Thames to the south. If you follow the "Aerial photo and map" link on the Wikipedia page and move the OS map overlay to the bottom centre of the photo you will see the obelisk marked. Clive is right: either Charing Cross or the GPO are the proper locations to use for London. I would vote for Charing Cross, but that's just personal preference. Peter Ilieve peter@aldie.co.uk