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2499RE: [ai-geostats] cokriging by using GSLIB

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  • Pierre Goovaerts
    Apr 6, 2006
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      Hi Feng,

      Indeed, you need to create a single file with the two variables
      combined and use a "missing value code" (i.e. below the trimming limit)
      at all locations where only one of the two variables have been measured.

      Regards,

      Pierre

      Pierre Goovaerts
      Chief Scientist at BioMedware Inc.
      Courtesy Associate Professor, University of Florida
      President of PGeostat LLC

      Office address:
      516 North State Street
      Ann Arbor, MI 48104
      Voice: (734) 913-1098 (ext. 8)
      Fax: (734) 913-2201
      http://home.comcast.net/~goovaerts/

      ________________________________

      From: Feng Liu [mailto:asherliu@...]
      Sent: Thu 4/6/2006 6:16 PM
      To: 'AI Geostats mailing list'
      Subject: [ai-geostats] cokriging by using GSLIB


      Dear list:

      I was trying to use cokriging to estimated soil N content while using NDVI as a secondary variable. I am confused of how GSLIB arrange the variables. Since I have more NDVI values than soil N values, Should I put both variables in one datafile ? If not, how to arrange that?

      Thanks a lot

      Feng Liu
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