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Thread: Performing some mathematical transformations in Geostatistical Analyst

  1. #1
    Orhan GUNDUZ
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    Default Performing some mathematical transformations in Geostatistical Analyst

    Hi guys:

    I need to perform some simple mathematical transformations on my cokrigged surface within Geostatistical Analyst. I know this is doable after the surface is exported as a grid and processed in Map Algebra. But I want to stay inside GA and do my computations within the tool.

    Anybody got any idea?

    Thanks,

    Orhan

  2. #2
    Eric Krause

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    Default Re: Performing some mathematical transformations in Geostatistical Analyst

    The back-transformation needs to be built into the kriging step. You can't simply apply a transformation, perform kriging, then apply the back-transformation to the results. In other words, you should stick to the transformations that we've developed and integrated into the kriging: Log, Box-Cox, ArcSin, and Normal Score.

    The Normal Score is the most functional type:
    http://help.arcgis.com/en/arcgisdesk...000v000000.htm

    For ArcGIS 10, Gaussian Kernels is the most functional approximation type for Normal Score Transformation.
    Eric Krause
    Geostatistical Analyst Product Engineer

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