[R-sig-Geo] Compensating smoothing effect by ordinary kriging

[Edzer Pebesma]

Navin, I believe constrained kriging may do this; I'm Cc:ing its
authors, who may not be on the list.

http://cran.r-project.org/web/packages/constrainedKriging/


On 12/04/2012 03:33 PM, Swagath wrote:
> Dear all,
> 
> I'm a relatively new with kriging methods using gstat. I am interested
> in performing an ordinary kriging to interpolate heavy metal
> concentrations across Europe  with 1000 data points.  However, I
> realized that when i performed cross-validation, OK tends to
> under-estimate my higher values and over-estimate some lower values. Is
> there anything i can do to correct for this smoothening effect by OK. I
> was doing a web search and came across a paper 'Compensating for
> Estimation Smoothing in Kriging' by Ricardo A. Olea and Vera Pawlowsky
> where they discuss about this smoothening effect. Can anybody tell me 
> how to compensate for this smoothening effect by OK and show the
> hot-spots on map.
> 
> Thanks a lot for your time and help.
> 
> Thanks,
> Navin
> 
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-- 
Edzer Pebesma
Institute for Geoinformatics (ifgi), University of Münster
Weseler Straße 253, 48151 Münster, Germany. Phone: +49 251
8333081, Fax: +49 251 8339763  http://ifgi.uni-muenster.de
http://www.52north.org/geostatistics      e.pebesma at wwu.de