Hi Oliver, You are right that such stratified kriging will create discontinuities close to the boundaries and if it does not make sense you can always perform the kriging on the residuals and add back the stratified means. An example is given in the paper you can download from http://www.terraseer.com/services/courses/geostats/geoderma.pdf
Cheers, Pierre Goovaerts <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><> Dr. Pierre Goovaerts President of PGeostat, LLC Chief Scientist with Biomedware Inc. 710 Ridgemont Lane Ann Arbor, Michigan, 48103-1535, U.S.A. E-mail: [EMAIL PROTECTED] Phone: (734) 668-9900 Fax: (734) 668-7788 http://alumni.engin.umich.edu/~goovaert/ <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><> On Mon, 4 Aug 2003, Oliver Sonnentag wrote: > hello list, > I have question regarding stratified (ordinary, simple, simple updating, etc.) > kriging. > when dividing my entire data set in different strata based on additional information > like geographical classification of natural landscapes, soil maps, aquifer or > watersheds (or whatever is suitable and justifed) and each subset is modelled and > interpolated seperately, how do I have to handle the effect that estimation points > close to the boundary of each polygon have most of their supporting values defined > by the search strategy in the adjacent polygon? applying a buffer around each > dividing polygon to get the observations close to the boundaries and clip the > interpolation results? would this be an option when using additional information > that rarely has sharp boundaries in reality like soils? > many many thanks in advance. > oliver > ______________________________________________________________________________ > Spam-Filter fuer alle - bester Spam-Schutz laut ComputerBild 15-03 > WEB.DE FreeMail - Deutschlands beste E-Mail - http://s.web.de/?mc=021120 > > > -- > * To post a message to the list, send it to [EMAIL PROTECTED] > * As a general service to the users, please remember to post a summary of any useful > responses to your questions. > * To unsubscribe, send an email to [EMAIL PROTECTED] with no subject and > "unsubscribe ai-geostats" followed by "end" on the next line in the message body. DO > NOT SEND Subscribe/Unsubscribe requests to the list > * Support to the list is provided at http://www.ai-geostats.org > -- * To post a message to the list, send it to [EMAIL PROTECTED] * As a general service to the users, please remember to post a summary of any useful responses to your questions. * To unsubscribe, send an email to [EMAIL PROTECTED] with no subject and "unsubscribe ai-geostats" followed by "end" on the next line in the message body. DO NOT SEND Subscribe/Unsubscribe requests to the list * Support to the list is provided at http://www.ai-geostats.org
