Hi Lorenz, As long as the mean is known and assumed constant across the study area, you can apply simple kriging. There is no need for that mean to be zero.
Cheers, Pierre <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><> 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, 24 Feb 2003, Dobler, Lorenz wrote: > hello list, > > > in simple kriging with means the mean of residuals is presumed to be zero. > if i derive (varying) local means from (correct) regression analysis, > residuals usually (should) satisfy the condition of zero mean. but if i use > predefined/"regional" (varying) local means i have some problems because the > mean of residual is far away from zero. > > is it absolutely necessecary in simple kriging with vaying local means that > the mean of residuals is really zero ? > if yes what can i do because my residuals are far awya from zero? > > i would be glad if someone could give some advice > > regards > > Lenz > > > > > > > Lorenz Dobler > Bayerisches Geologisches Landesamt > (Geological Survey of Bavaria) > He�strasss 128 > D-80797 M�nchen > Germany > Tel.: 0049/(0)89/9214-2756 > email: [EMAIL PROTECTED] > http://www.geologie.bayern.de/ > > > -- > * 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
