[GRASS-user] Re: Spatial interpolation of river network observations

[Daniel Victoria]

I recall Hamish once released an interpolate with barriers code that I
believe it's in the addons.

Never used it myself but you should take a look
http://lists.osgeo.org/pipermail/grass-user/2008-February/043541.html

The screenshot is very neet and looks like what you want to do. Just
don't know about the 3d interpolation though. I think it's just 2d....
http://grass.osgeo.org/wiki/File:Inlets_03_SurfSal_icw_big.png

Cheers
Daniel

On Tue, Nov 17, 2009 at 8:28 AM, Margherita Di Leo <diregola at gmail.com> wrote:
> Hi Ulrich,
>
> AFAIK the algorithm to calculate the hydrological distance is actually
> r.stream.distance.
>
> Hope this helps
>
> Margherita
>
> Date: Tue, 17 Nov 2009 10:52:45 +0100 From: Ulrich Leopold
> <Ulrich.Leopold at Tudor.lu> Subject: [GRASS-user] Spatial interpolation of
> river network observations To: R-sig-geo list <r-sig-geo at stat.math.ethz.ch>,
> grass-user at lists.osgeo.org Message-ID: <4B02726D.4050002 at Tudor.lu>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Dear all,
>
> I would like to interpolate 17 pollution observations in a storage lake in 3
> dimensions (x,y,z).
>
> As I understand variogram analysis and kriging are not straightforward as we
> are dealing with non-euclidean (hydrologic) distances and down-stream
> direction.
>
> Could someone point me to some algorithms which can roughly estimate the 3d
> pollution body accounting for hydrologic distances?
>
> --
> Eng. Margherita Di Leo
> Ph.D. Candidate
> Methods and Technologies for Environmental Monitoring
> Department of Environmental Engineering and Physics (DIFA)
>
> University of Basilicata Campus Macchia Romana
> 85100 - Potenza Italy
>
> Office: +39-0971205363
> Fax: +39-0971205160
>
>
>
>
>
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