[R-sig-Geo] using IDW with anisotropy

[Paul Hiemstra]

Hi,

You could also opt for kriging, which supports anisotropy. The intamap
package has a function to detect anisotropy, in case you would like to
automate the interpolation.

cheers,
Paul

On 03/18/2011 01:41 AM, smurray at worldbank.org wrote:
>
> Thanks for the reply. I was planning to generate a surface for each
> time slice independently, so just x ,y.
> Siobhan
> Inactive hide details for Re: [R-sig-Geo] using IDW with anisotropyRe:
> [R-sig-Geo] using IDW with anisotropy
>
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> 	
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> *Re: [R-sig-Geo] using IDW with anisotropy*
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> *Edzer Pebesma* 	
> to: 	
> r-sig-geo 	
> 03/17/2011 02:03 PM
>
>
>
> Sent by: 	
> *r-sig-geo-bounces at r-project.org*
>
> 	
>
>
> ------------------------------------------------------------------------
>
>
> Are you interpolating in 3D (x,y,t)?
>
> On 03/17/2011 04:21 PM, smurray at worldbank.org wrote:
> > hello,
> >
> > I have a timseries dataset of monthly precip data from rain guages.
> The coverage
> > is relatively sparse (approx 30 stations covering the country) and
> there is
> > strong anisotropy in the data - at the monthly timestep data is
> strongly
> > correlated in the E-W direction. Is there any way to use modify the IDW
> > interpolation in gstat, to incorporate a directional bias in the
> distance weight?
> >
> > many thanks for any suggestions
> >
> >
> >
> >
> > _______________________________________________
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> > R-sig-Geo at r-project.org
> > https://stat.ethz.ch/mailman/listinfo/r-sig-geo
>
> -- 
> 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
>
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-- 
Paul Hiemstra, MSc
Global Climate Division
Royal Netherlands Meteorological Institute (KNMI)
Wilhelminalaan 10 | 3732 GK | De Bilt | Kamer B 3.39
P.O. Box 201 | 3730 AE | De Bilt
tel: +31 30 2206 494

http://intamap.geo.uu.nl/~paul
http://nl.linkedin.com/pub/paul-hiemstra/20/30b/770

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