[R-sig-Geo] variance estimation (gstat, geoR, automap)

[Virgilio Gomez Rubio]

Hi,


In addition to the list provided by Paul, I would like to add

Geostatistics for Environmental Scientists, 2nd Edition
Richard Webster, Margaret A. Oliver 

I have used it in courses for agricultural and environmental engineers
and it worked well. I think that the balance between mathematical
complexity and applications is quite good.

Best,

Virgilio



El mar, 24-02-2009 a las 23:03 +0100, Paul Hiemstra escribió:
> 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
> >
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> >
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> >
> > 07015 Palma de Mallorca
> >
> > Baleares, España
> >
> > Telf.: (34) 971 401561
> >
> >  
> >
> >
> >
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