Els,
Which GSLIB program are you using? When you refer to the practical range
a and 3a this is normally associated with the exponential model, the GSLIB
programs appear to be setup to use spherical model parameters, so you
should fit spherical models to your data, in the case of fitting a
Dear Els,
GSLIB uses the practical range for the exponential model.The best way to
check this is to calculate your experimental variograms with gamv, run
the model with vmodel and then plot them together using vargplt. If the
model fits correctly your data, then you can copy the parameters from
Hi Els,
The key question here is the sampling density and how many data will
be included in this search window. If there are many, the screening effect
will greatly attenuate the impact of the data further away, hence using a or
3a won't make a big difference. If data are sparser, then usually I
