[R-sig-Geo] kriging

[Paulo Justiniano Ribeiro Jr]

Dave,

what is necessary for UK is a relation expressed by a linear model, not
necessaraly a linear relation between the variables.
e.g. you could have a second degree polinomial and still work within the
scope of universal kriging.


On Mon, 16 Jun 2008, Dave Depew wrote:

> Hi all,
> I have a data set that I would like to krige to interpolate between
> transects. There is a non-linear trend between two of the variables...my
> impression from reading the gstat help file is that there must be a
> linear relationship between the data to use universal kriging?
> Second, would a method of non-linear regression followed by modelling of
> the residuals with a semivariogram be an appropriate solution?
>
> Thanks,
>
> Dave
>
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Paulo Justiniano Ribeiro Jr
LEG (Laboratorio de Estatistica e Geoinformacao)
Universidade Federal do Parana
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Tel: (+55) 41 3361 3573
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e-mail: paulojus AT  ufpr  br
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