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Re: AI-GEOSTATS: Coordinate conversion near the poles

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  • Jim Bash
    Sorry, I didn t notice the reference to the Faulklands, just the question about near the south pole . 60S isn t that near and UTM would be fine if the study
    Message 1 of 5 , Feb 14, 2004
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      Sorry, I didn't notice the reference to the Faulklands, just the question
      about "near the south pole". 60S isn't that 'near' and UTM would be fine
      if the study stays in one zone.

      On Sat, 14 Feb 2004, Roger Bivand wrote:
      > Hold on. hold on! Look, Bergen, Norway is 60N, the Falklands, even with
      > South Georgia, are not even 60S. I protest that this isn't that near the
      > poles, even the Arctic and Antarctic circles are at 66.6...N, and that's
      > well within the 80N/S of UTM. The question was whether to transform from
      > latlong to anything projected in order to do geostats, and the answer is
      > yes, unless your geostats software itself calculates great circle
      > distances from latlong coordinates (the fields package in R does, for
      > example). So the answer is yes, use a projection of choice, UTM being a
      > possibility (depending on the W-E extent of your data), or use software
      > that respects that your data are latlong.

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