Why Datums matter..

A nice article that lifts the lid on all the complexity we try to hid with tools like Google Earth.. and explains why the prime meridian at Greenwich is not the same on your iPhone !#blog

What Happens to Google Maps When Tectonic Plates Move? | Critical Opalescence, Scientific American Blog Network
A couple of weeks ago, I was writing up a description of Einstein’s general theory of relativity, and I thought I’d compare the warping of spacetime …

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