Dear list,
I'm graduate student in hydrogeology, I've to spatialize data of
reservoir thickness, and I need to achieve a map having exactly the
sampled value in the sampled localization (piezometers). I've little
experience in geostatatistics.
I had a look at kriging algorithms, but I did
Andrea
In theory kriging will honour the sample values provided your semi-variogram
model takes the value zero at zero distance.
Whether the data are honoured or not depends on which computer package you
use and what it does with the semi-variogram at zero. You can force this
Dear Colleagues
I thought exact interpolant property of kriging is very applicable to
every case regardless of variogram used. But, Isobel's posting implies it
is not the case.
Furthermore, IDW of any types honor exact interpolant property. It can be
proved mathematically.
Thanks
I think that Isobel refers to the implementation of the kriging algorithm in
ESRI
products where the nugget variability is automatically filtered from the
data. Hence,
if your variogram has a non-zero nugget effect, the kriged surface won't
honor the data
at sampled locations.
Pierre
Pierre
