Maybe it is worth pointing out that Ordinary Kriging
with a 'global neighbourhood' (using all the points in
simple speak) is the same as Simple Kriging with a
neighbourhood which extends to the range of influence
of the semi-variogram model (if any).
Given this fact, you would be computationally
Ulrich Leopold wrote:
Dear list,
What would you consider the most reliable ordinary kriging estimate? To
use a local search neighbourhood (slightly bigger than the effective
range) or set to global to include *all* data locations?
Ulrich
Depending on the strength of spatial correlaton and
Ulrich
Depends how powerful your computer is, what algorithm
you use to solve equations and how many data you have.
Isobel
http://geoecosse.bizland.com/0toKriging.htm
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Hi Ulrich,
It's not an easy question. First note that the search strategy
includes not only the size of the search window but also the maximum
number of observations. In may occasions, I set the search radius
to a very large distance and use the number of observations as
the controling parameter.
