AI-GEOSTATS: Variograms models

Hi all, Does anyboby can explain to me the origin of the variogram models: spherical and exponential ? Why the names spherical and exponential ? Sincerely Charles -- * To post a message to the list, send it to [EMAIL PROTECTED] * As a general service to the users, please remember to post a

AI-GEOSTATS: Variogram computing and fitting codes

Hello All, I'm looking some C codes to compute and fit (with spherical and exponential models) experimental variograms. I know that many software can do that, but I have more than 100 samples data over which I have to generate the variograms and modeled them to find out the range and sill values.