[R-sig-Geo] kriging inside borders

Paulo Justiniano Ribeiro Jr paulojus at est.ufpr.br
Thu May 19 20:19:30 CEST 2005


There are a few exemples of kriging inside borders in the geoR tutorials
section available at:

Basically you can use polygrid(), althouhg there are other mechanisms
available. polygrid() relies on a splancs function internaly

Please have a look and if the problem persists please contact me
preferelably with some dumpoed workspace and scripts


On Thu, 19 May 2005, Chloe ARCHINARD wrote:

> Hello,
> I'm using geoR package to compute kriging with the function krige.conv() and I used maptools (read.shape () +  Map2poly () )
> and splancs (borders) packages to include a object of class polylist for the attribute borders.
>  But I've got this message of error when 'borders' is in krige.conv () :
> krige.conv: there are no prediction locations inside the borders.
> My polylist is not good? The coordinates seam to be OK when I draw a map with this polylist object.
> And if I use 'borders' in the contour function : message error is :
> Error in as.data.frame.default(borders) : can't coerce class "polylist" into a data.frame
> If someone could help me, thanks a lot!
> Chloé Archinard
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Paulo Justiniano Ribeiro Jr
LEG (Laboratório de Estatística e Geoinformação)
Departamento de Estatística
Universidade Federal do Paraná
Caixa Postal 19.081
CEP 81.531-990
Curitiba, PR  -  Brasil
Tel: (+55) 41 3361 3573
Fax: (+55) 41 3361 3141
e-mail: paulojus at est.ufpr.br

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