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:OK, to reply to myself, I found some info, and we now have an [[georef|article on Georef]]. — [[User:Johantheghost|Johan the Ghost]] [[User talk:Johantheghost|<sub>seance</sub>]] 11:21, 17 February 2006 (UTC)
== What datum? ==
This makes no sense whatsoever. Anyone care to explain? How does someone have a legitimate lat and long and not know where on earth it is?! [[User:RobertDahlstrom|RobertDahlstrom]] ([[User talk:RobertDahlstrom|talk]]) 21:49, 7 May 2008 (UTC)
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Sorry about being too brief, but I hoped people would follow the link to [[geodetic datum]]. Actually, a better link would be [http://www.ordnancesurvey.co.uk/oswebsite/gps/information/coordinatesystemsinfo/guidecontents A guide to coordinate systems in Great Britain], published by the Ordnance Survey. It gives the best explanation of geodetic datums that I have ever seen. Figure 1 in the introduction gives an example of what I meant. --[[User:Mikael R|Mikael R]] ([[User talk:Mikael R|talk]]) 19:14, 13 May 2008 (UTC)
:I too am confused about why a different coordinate system cannot indicate the same ___location. Seems to me (an ignorant layman) that it would depend instead on whether they use the same datum. Or is there a rule that says that's not allowed? [[User:Jim.henderson|Jim.henderson]] ([[User talk:Jim.henderson|talk]]) 01:56, 18 January 2011 (UTC)
== point reference system ==
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