[R-sig-Geo] how is variance defined in krige {gstats}

[Paul Hiemstra]

Dear Herry,

Details on kriging variance are given in several books on geostatistics. 
For example the following book:

(Chiles1999) Chiles, J. & Delfiner, P. Geostatistics: Modeling Spatial 
Uncertainty John Wiley & Sons, New York, 1999

A paragraph on the kriging variance is on page 176-177. How it is 
calculated is explained in the parts that describe kriging. (e.g. p. 156).

hth,

Paul

Alexander.Herr at csiro.au schreef:
> Hi list/Edzer,
>
> I am trying to determine errors in the krige output and can't find any
> documentation on the details of the variance output of krige {gstats}
> (variable var1.var of krige output).
>
> How is this variance defined? Basically I am after a way to calculate
> other statistics like N, standard error, CV or a probability to describe
> the uncertainty of the krige output.
>
> All help appreciated
> Thanks
> Herry
>
>
> Dr Alexander Herr
> Spatial and statistical analyst
> CSIRO, Sustainable Ecosystems
> Davies Laboratory,
> University Drive, Douglas, QLD 4814 
> Private Mail Bag, Aitkenvale, QLD 4814
>  
> Phone/www 
> (07) 4753 8510; 4753 8650(fax)
> Home: http://herry.ausbats.org.au
> Webadmin ABS: http://ausbats.org.au
> Sustainable Ecosystems: http://www.cse.csiro.au/
>
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-- 
Drs. Paul Hiemstra
Department of Physical Geography
Faculty of Geosciences
University of Utrecht
Heidelberglaan 2
P.O. Box 80.115
3508 TC Utrecht
Phone: 	+31302535773
Fax:	+31302531145