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2431RE: [ai-geostats] Re: Software for Automatic Semivariogram Estimation

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  • Gregoire Dubois
    Mar 1, 2006
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      GSLIB, Gstat and GMES  (the last is not yet broadly used but time will come) are free tools that can be considered nowadays as "reference material".
      Main reason for this is that source codes are available and can be properly checked, this is not the case for commercial packages.
      ... see the software section of ai-geostats (a bit old but I will work on it soon)
      Best regards,

      Gregoire Dubois (Ph.D.)

      European Commission (EC)
      Joint Research Centre (JRC)
      WWW: http://www.ai-geostats.org

      "The views expressed are purely those of the writer and may not in any circumstances be regarded as stating an official position of the European Commission."

      -----Original Message-----
      From: Hohner, Susan [mailto:shohner@...]
      Sent: 28 February 2006 19:28
      To: AI Geostats mailing list
      Subject: RE: [ai-geostats] Re: Software for Automatic Semivariogram Estimation



      I was working through the tutorial for the Geostatistical Analyst Extension when this email discussion popped up.  Any recommendations for a “traditional geostatistics software package”?





      Susan Hohner, Senior Geographer

      Everglades Division, Mail Stop 4440

      South Florida Water Management District

      3301 Gun Club Road, West Palm Beach , FL33406

      (561) 682-6801 phone

      (561) 682-0100 fax




      From: Chaosheng Zhang [mailto:Chaosheng.Zhang@...]
      Sent: Tuesday, February 28, 2006 12:25 PM
      To: AI Geostats mailing list
      Subject: Re: [ai-geostats] Re: Software for Automatic Semivariogram Estimation


      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).





      Dr. Chaosheng Zhang
      Lecturer in GIS
      Department of Geography
      National University of Ireland , Galway
      Tel: +353-91-492375
      Fax: +353-91-495505
      E-mail: Chaosheng.Zhang@...
      Web1: www.nuigalway.ie/geography/zhang.html
      Web2: www.nuigalway.ie/geography/gis



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