Dear Dr. Rocchini:
Well, my first reaction is that R squared is not an appropriate measure for
correlated data. Secondly, such a large area may well have an underlying trend
which should be removed before kriging is attempted and lastly the number of
observations seems very small if that is
Duccio
There are many reasons why your interpolations may not
be working. A few of these are:
# you are beyond the range of influence of any
distance relationship, that is you have too widely
spaced sampling.
# your data may have a skewed or other non-Gaussian
distribution which makes both