What's your position?
September 6, 2006 4:48 AM Subscribe
Do you know where you are? With Google Maps and Google Earth so commonplace now, GPS everywhere, and with websites such as our own Metafilter making use of latitude and longitude did you ever stop to think about how all this latitude, longitude and height above sea level works? The UK's Ordnance Survey explains it all in A Guide to Coordinate Systems in Great Britain. Discover that different coordinate systems might differ by as much as 200m, and that your house may be moving as much as 1m up and down each day relative to the centre of the Earth, and many other bits of geographical interest.[more inside]
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