Hi Digby and Isobel, Just another bit to add on the variogram.
There is a large body of work that was done in the Soviet Union by Kolmogorov and his school. He came up with the first 'kriging' in the 30's in the context of signal filtering (Norbert Wiener in MIT did this at the same time). The Soviet school started looking at non stationary cases in the 40s (calling them generalised random functions). In so doing - they looked at the case of random functions whose differences are stationary - this in effect was the motivation for Matheron defining the variogram. Much of the Soviet schools work appears to be rather theoretical. Matheron extracted and developed the practical component of this body of work and put it to work in the context of what he saw Krige, de Wijs and others doing in South Africa A good reference for the Soviet school's work (and perhaps the best book that I have read on the maths of 2 point random functions (ie characterisaed by a covariance fnction or generalised covariance function or variogram)) is Yaglom A.M., 1987 Correlation Theory of Stationary and Related Random Processes Vol 1 Springer-Verlag. Best Regards and happy new year Colin Daly ----- Original Message ----- From: "Isobel Clark" <[EMAIL PROTECTED]> To: "Digby Millikan" <[EMAIL PROTECTED]> Cc: <[EMAIL PROTECTED]> Sent: Sunday, January 05, 2003 12:15 PM Subject: Re: AI-GEOSTATS: Original Covariogram paper. > Digby > > There is a 96 page bibliography in the back of > Cressie's book! > > Cressie, Noel A. C., Statistics for Spatial Data, > Revised Edition, 1993, John Wiley & Sons, Inc, New > York, 900pp. > > The earliest paper I know of about variograms (but not > using that terminology) is by Prof de Wijs in a paper > in the SAIMM journal around 1953. He called it > studying "successive differences" and wrote it whilst > on sabbatical in South Africa. Hence the "de Wijsian > model" cited by Matheron - who did coin the > terminology in 1963. > > There is also a paper by Cressie in Math Geol called > "The Origins of Kriging" which came out in the early > 90s. > > Isobel > http://geoecosse.bizland.com/news.html > > __________________________________________________ > Do You Yahoo!? > Everything you'll ever need on one web page > from News and Sport to Email and Music Charts > http://uk.my.yahoo.com > > -- > * 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 DISCLAIMER This message contains information that may be privileged or confidential and is the property of the Roxar Group. It is intended only for the person to whom it is addressed. If you are not the intended recipient, you are not authorised to read, print, retain, copy, disseminate, distribute, or use this message or any part thereof. If you receive this message in error, please notify the sender immediately and delete all copies of this message. -- * 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
