Hello, In the program VARIO2D with PCF in the software VARIOWIN 2.2, we need to identificate the main directions of anisotropies of the spatial behavior of a variable. For this, we use the Variogram Surface. I didn't quite understand how we use this graph for having directions of anisotropies? I am sorry for this relatively simple question but I am not a specialist in Geostatistics. Thanks in advance for any answer. Agnès -- * 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