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GEOSTATS: non correlated spatial data

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  • Donald Myers
    RE: Cathy Schloeder s question First of all one has to ask what is meant by the lack of spatial autocorrelation and essentially this has to be asked in the
    Message 1 of 1 , Dec 3, 1997
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      RE: Cathy Schloeder's question

      First of all one has to ask what is meant by the
      lack of spatial autocorrelation and essentially this
      has to be asked in the context of a model. Without
      spatial correlation then the best interpolator is
      the mean and then the question is whether this is
      constant or dependent on position.

      A non-constant mean would correspond to the use
      of a Trend Surface. Note that the non-constant
      mean might be in reference to some other characteristic
      than position coordinates.

      Inverse Distance Weighting, Splines, Kriging, Radial
      Basis Functions all assume a form of spatial
      correlation.

      Without spatial correlation and a constant mean
      simply use the average of the data values at each
      point to be interpolated. Even at data points use
      the average since then the difference is simply
      "error"

      Donald E. Myers
      Dept Math.
      University of Arizona
      htttp://www.u.arizona.edu/~donaldm
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