Title: Definition of standardize variograms
Dear list,
While playing around with different software, I encounter different definitions for standardized variograms.
Surfer (which is using the terminology of Variowin), uses the term standardized semivariogram for variograms obtained by
10 lin(2000) is a linear model, used by Gstat
software, with a sill of 10 and a range of 2000
meters.
Regards,
NoName
--- Digby Millikan [EMAIL PROTECTED] wrote:
Is 10lin2000 a De Wisjian model, you're describing
spherical model
parameters, is that your real name?
Regards Digby
-
Gregoire
Michel David coined the term relative semi-variogram
back in the 70s for what I think you mean by general
relative -- that is, each lag is divided by the square
of the mean of the samples used at that lag.
Gary Raymond proposed the pairwise relative soon
after. I used the type you are
Hi-
I was doing some work on the uncertainty in plan areas based on hits or
misses on a more or less regular grid and was going to use an indicator
variogram approach and assume that the global estimation variance would be a
good approximation of the uncertainty.
I recalled that in Matheron's in
Hi Gregoire,
I agree with you regarding the merits of the standardized semivariogram as
implemented
in variowin software. In one of my last studies, the rescaling by the lag
variance helped
correcting the preferential sampling of wells with high arsenic levels, leading
to a
susbtantial
