Hi Olumide You will find the basic kriging system for Multi-variable Universal Co-kriging in our definitive 1987 paper which can be viewed or downloaded from the web at: http://www.kriging.com/publications/Battelle1987 Our thought was that interdependent trends would be adequately handled by including both trends in the co-kriging system.
Isobel Olumide <[EMAIL PROTECTED]> wrote: Hi - On page 312 of "Geostatistics: modeling spatial uncertainty" the authors Chiles and Delfiner discuss algebraic dependence between drift coefficients of a primary and secondary variable, in the simplest case. Under what typical conditions can such an assumption about drifts be made? In the case of terrain data for example, where the height is the primary variable and the slope or gradient the secondary variable. Are the drift coefficients of both variables ... erm ... dependent? And why. Ultimately, I'm trying to work out the cokriging equation for such a problem. Thanks, - Olumide + + To post a message to the list, send it to ai-geostats@jrc.it + 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/
