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595Re: AI-GEOSTATS: hole effect

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  • Isobel Clark
    Apr 24, 2002
      > Omnidirectional variogram shows a dip toward the end
      > of lags. As far as I know this is hole effect.
      > Would you tell me how to tackle with it?

      What is your maximum 'lag' compared to the size of
      your study area? If the maximum lag is more than
      one-half (some people say one-quarter) of the maximum
      distance in your area, you will be getting the common
      artifact caused by diminishing numbers of pairs.

      If it is a real cycle, it may be of such a large
      extent that it is irrelevant to your analysis.


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