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679AI-GEOSTATS: Crossvalidation

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  • Victoria Íñigo Mendoza
    Aug 7, 2002
    • 0 Attachment
      Dear list members:
      I'm doing my PhD about forestry soils and I use Idrisi 3.2 for my
      geostatistical analysis with Gstat interface. I do Ordinary Kriging and
      after fitting the model when I do the crossvalidation I have to
      interpret this factors. Which of those have I pay attention in, to
      decide the best model?:

      corr(Obs, Pred): 0.1709 [using ordinary kriging]

      observed predicted pred.-obs. pred.std. zscore
      ======================================================================
      minimum 26.6 225.9 -3043 352 -8.528
      1st q. 224.6 379.8 -119.9 367.9
      -0.3343
      median 360.4 499.3 114 373.8 0.3052

      3rd q. 653.1 658.8 314.4 383.9
      0.8117
      maximum 3685 1658 1173 418.5 3.166

      n 118 118 118 118
      118
      mean 552.3 558.9 6.545 376.1 0.01326
      std.dev. 616.1 236.5 621 13.77 1.679


      Thanks and best regards
      Victoria Iñigo Mendoza
      University of La Rioja
      Spain


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