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Re: [AI-GEOSTATS: global vs local ordinary kriging]

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  • Isobel Clark
    Maybe it is worth pointing out that Ordinary Kriging with a global neighbourhood (using all the points in simple speak) is the same as Simple Kriging with a
    Message 1 of 4 , Jul 11, 2003
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      Maybe it is worth pointing out that Ordinary Kriging
      with a 'global neighbourhood' (using all the points in
      simple speak) is the same as Simple Kriging with a
      neighbourhood which extends to the range of influence
      of the semi-variogram model (if any).

      Given this fact, you would be computationally safer to
      do Simple Kriging - otherwise known as "kriging with
      known mean" and saving yourself the problems of
      enormous and sparse matrix solutions.

      The only overhead to Simple Kriging is producing a
      reliable estimate of the global mean and, to be
      realistic, a standard error associated with it.

      Isobel Clark
      http://geoecosse.bizland.com/courses.htm

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