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altitude data?

altitude data?

Posted Mar 8, 2009 0:24 UTC (Sun) by jordanb (guest, #45668)
In reply to: altitude data? by iabervon
Parent article: OpenStreetMap: the data behind the maps

Minor nitpick. The earth's core is divided into two regions. The outer core is -- indeed -- liquid. But the inner is believed to be a solid sphere some 1,500 miles in diameter.

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altitude data?

Posted Mar 8, 2009 3:27 UTC (Sun) by iabervon (subscriber, #722) [Link]

Clearly my references are 2-4 billion years out of date. But, in any case, this means that there's a more dense, possibly irregular, object in the center of the earth which is not rigidly attached to the surface. People think it's rotating relative to the surface at about a degree/year, too, which implies that any theologically significant point on it moves under the surface by about 66 miles every year (in some direction).

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