Tag Archive: NAD83

May 17 2011

Where am I?

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“It is clear that the earth does not move, and that it does not lie elsewhere than at the center.”                 – Aristotle (one of first to estimate size of the earth, On the Heavens, p54) We’ve talked a little about geodesy and reference ellipsoids but what is a datum? It’s pretty simple, actually. A datum …

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