Dear Vikas Singh, This is no direct answer directing to a specific software, but just my personal experience:
I saw such automated fitting procedures in some bundle programs (If I remember right, e.g. in Surfer and ArcGIS) done some kind of geostatistics and I did some programming of my own trying least squares and Maximum Likelihood. However my personal experience was that automated fitting of the variogram might be good for fine tuning a manual solution or for a first suggestion, which afterwards has to be checked manually, but was simply to unreliable for a pure automated application without user interaction. My suggestion for a routine application kriging the same kind of data every day would be to do some manual evaluation of the variograms of past datasets until one has an idea what kinds of variograms show up, whether or not there is significant variation between the variograms at different times, and what is the character and range of variation. Than one could either rely on Bayesian Kriging using the inferred possible range of parameters and the typical variogram shape as a prior or check the reliability of the various automated fitting procedures (which hopefully the others in the list will supply) against that old datasets. Best regards, Gerald Am Freitag, 4. Mai 2007 18:29 schrieb Vikas Singh: > Dear List, > > I am new to this field. I am sorry, If I write something wrong. > > I am trying to apply kriging using gslib for the spatial interpolation > of measurement environmental data. Prior to kriging, I have to obtain > the semi-variogram for a lag distance and obtain the variogram model, > sill, range, nugget and use these parameters for kriging. > > > Now my query is, to know the sill, range, type of model, we have to do > it manually, looking at the variogram and fitting it with different > models. Is there any tool, algorithm or library by which I can obtain > these values from semi-variogram automatically and pass these values > to the model for kriging. > > Actually I want to make a system in which everyday measurements can be > krigged automatically. > > thank you -- ------------------------------------------------- Prof. Dr. K. Gerald v.d. Boogaart Professor als Juniorprofessor fuer Statistik http://www.math-inf.uni-greifswald.de/statistik/ B�ro: Franz-Mehring-Str. 48, 1.Etage rechts e-mail: [EMAIL PROTECTED] phone: 00+49 (0)3834/86-4621 fax: 00+49 (0)3834/86-4615 (Institut) paper-mail: Ernst-Moritz-Arndt-Universitaet Greifswald Institut f�r Mathematik und Informatik Jahnstr. 15a 17487 Greifswald Germany -------------------------------------------------- + + To post a message to the list, send it to [email protected] + To unsubscribe, send email to majordomo@ jrc.it with no subject and "unsubscribe ai-geostats" in the message body. DO NOT SEND Subscribe/Unsubscribe requests to the list + As a general service to list users, please remember to post a summary of any useful responses to your questions. + Support to the forum can be found at http://www.ai-geostats.org/
