Younes You can try what we used to do in the "bad old days" when it took 20 minutes to calculate a semi-variogram on 1,000 samples -- moving windows.
Choose a sub-region size which includes about 1,000 samples. Calculate and graph from the samples in this window. Shift half-a-window in one direction. Repeat. Then display all of your graphs as a 'map' for each level. In 1981, I covered the floor of an empty meeting room with computer print out ;-) Thank god for graphics. This approach has the added advantage of being able to visually assess stationarity or lack-of. Only then should you consider modelling. Isobel http://www.kriging.com/shopping/EcoSSe_3D_details.htm + + To post a message to the list, send it to ai-geost...@jrc.ec.europa.eu + To unsubscribe, send email to majordomo@ jrc.ec.europa.eu 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/
