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Dear all,
I have the same concerns with ArcGIS Geostatistical Analyst Extension
(v.9.1). I would use a traditional geostatistics software package
to fit the variogram models in a very traditional way, and input the parameters
to ArcGIS for kriging. It seems that ArcGIS has its own reasons to
show variograms in a non-traditional way, but I find it almost
impossible to fit the variograms mannually. You can change the parameters,
but it is very hard to see how well they fit. By the way, you can change
the lag distance or interval in ArcGIS (it is called "lag size" there).
Cheers,
Chaosheng
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Dr. Chaosheng Zhang Lecturer in GIS Department of Geography National University of Ireland, Galway IRELAND Tel: +353-91-492375 Fax: +353-91-495505 E-mail: [EMAIL PROTECTED] Web1: www.nuigalway.ie/geography/zhang.html Web2: www.nuigalway.ie/geography/gis |
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