Hi Pilar,
I think this list appropriate :). What would be a good idea is to get a
book that describes kriging, some standard books are:
Chilès, J. & Delfiner, P. Geostatistics: Modeling Spatial Uncertainty
John Wiley & Sons, New York, 1999
Christensen, R. Plane Answers to Complex Questions: The Theory of Linear
Models Springer, New York, 1996
Journel, A. & Huijbregts, C. Mining Geostatistics Academic Press., 1978
A more practical book would be the Applied Spatial Data Analysis in R,
see http://www.asdar-book.org/ for more info.
On the web you could look at:
http://www.kriging.com/, Owned by Isobel Clark
http://spatial-analyst.net/wiki/index.php?title=Main_Page, not sure if
there is something here on the theory of kriging.
For a description of kriging (quite mathematical) you can also look at a
paper I wrote, you can download it from
http://intamap.geo.uu.nl/~paul/Publications.html, it is the first one
titled Read-time automatic...etc
This is all I could think of :).
cheers,
Paul
Pilar Tugores Ferra schreef:
Dear all,
I'm trying to estimate the variance of a global abundance estimation computed
by kriging interpolation and I am stuck.
One can easily retrieve the variance at each prediction location (either using
the package gstat, geoR or automap) using expressions similar to:
kriging_object$krige.var
or >kriging_object$var1.var
but, in fact, I have no idea how these variance values are computed.
Could anybody tell me how is it computed or suggest some reference material?
Could this question be inappropriate for this list in which case I would also
apprieciate if someone could tell me where to ask it.
Cheers,
Pilar
Mª Pilar Tugores Ferrà
PhD Student
Instituto Español de Oceanografía
Centro Oceanográfico de Baleares
Muelle de Poniente s/n
07015 Palma de Mallorca
Baleares, España
Telf.: (34) 971 401561
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