Dear Olumide, I would simply propose to use standard Kriging in 3D Euclidean Geometry.
This solves the problem of a valid variogram model and the surface of a bone is not such rough that a 3D distance would lead to uncomparable distances. With respect to surface distance approaches, it is by no means clear that the value in two indentions with a bump in between is more different than the values in the first indention and the value on top of the bump, because typically the processes on the surface have a longer correlation length then the structure of the bone itself. Thus a curved distance does not seam usefull in this situation. For kriging along the event horizon of black holes Riemannian geometry might do a better job ;-). But lets keep things simple. Best regards, Gerald Am Dienstag, 3. April 2007 03:14 schrieb Olumide: > Hello - > > (I'm relatively new to the subject and to the forum.) > > Are there any methods for kriging non-planar surfaces that have no > natural parametrization e.g. a meteorite. > > 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/ -- ------------------------------------------------- Prof. Dr. K. Gerald v.d. Boogaart Professor als Juniorprofessor fuer Statistik http://www.math-inf.uni-greifswald.de/statistik/ B�ro: Franz-Mehring-Str. 48, 1.Etage rechts e-mail: [EMAIL PROTECTED] phone: 00+49 (0)3834/86-4621 fax: 00+49 (0)3834/86-4615 (Institut) paper-mail: Ernst-Moritz-Arndt-Universitaet Greifswald Institut f�r Mathematik und Informatik Jahnstr. 15a 17487 Greifswald Germany -------------------------------------------------- + + 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/
