Loading ...
Sorry, an error occurred while loading the content.

839AI-GEOSTATS: Experimental variograms.

Expand Messages
  • Digby Millikan
    Jan 13, 2003
    • 0 Attachment

      Further information regarding my previous email, I illustrate by means
      of an example.

      e.g a variogram may be computed from data;

      Lag(m) SemiVariogram Number of values Coefficient of Variation
      2 20 100
      4 40 200
      6 60 200
      8 60 200

      Another variogram may be calculated within a different region;

      Lag(m) SemiVariogram Number of values Coefficient of Variation
      2 20 100
      4 40 200
      6 60 200
      8 60 200

      In both cases a well shaped variogram has been computed to which a
      spherical model could be fitted.
      However the coefficient of variation is much different for the variogram
      points for the two cases.
      In the first case the coefficient of variation for each sample point is
      fairly low, so we could assume that the variogram is a good
      representation of the underlying dataset considering that we have taken
      a few random samples from an underlying large population.
      In the second case however the Coefficient of Variation is considerably
      higher so we would wonder how much any spatial model produced from
      this variogram is smoothed using a model fitted to such a variogram.
      My question was I was wondering if anyone has comments or can
      suggest any research or literature on the effects of the C.V., S.D. or
      variance of variogram values, and their effect on producing smoothed

      Regards Digby Millikan B.Eng

      Geolite Mining Systems
      U4/16 First Ave.,
      Payneham South SA 5070
      Ph: +61 8 84312974


      * To post a message to the list, send it to ai-geostats@...
      * As a general service to the users, please remember to post a summary of any useful responses to your questions.
      * To unsubscribe, send an email to majordomo@... with no subject and "unsubscribe ai-geostats" followed by "end" on the next line in the message body. DO NOT SEND Subscribe/Unsubscribe requests to the list
      * Support to the list is provided at http://www.ai-geostats.org
    • Show all 5 messages in this topic