[ai-geostats] Sill Not Reaching 1.0
- Hi Collin
It is likely that your variogram or correlogram does not reach the sill
because your data are spatially correlated. It is well known that
Gamma_bar(D,D) <= Sill. (The average value of the variogram over the deposit
is less than or equal to the sill).
As for the correlogram -- it is not an artifact as some would have you
believe. In fact, the correlogram can be seen as a measure of spatial
correlation following the removal of first and second order trends from the
data. For an explanation of this last statement, type
www.isaaks.com/Info/ in your browser and see the file "variofaqs.pdf".
Hope this helps.