s.vol.rst - precip interpolation ?

[Bernhard Sturm]

Hi Chris
I am currently working on a thesis dealing exactly with this problem, so far
I only used s.surf.tps and s.surf.idw in order to interpolate from site
data, but my goal is to interpolate rainfall with respect to elevation. I am
heading towards a self written module which uses r.mapcalc together with
pre-calculated elevation regression parameters for the modification of the
*flat* interpolated raster maps...
However, I would be grateful if anybody else knows of an already existing
procedure (or module) to solve this problem within GRASS...

Cheers
Bernhard Sturm
....................................
Centre for Development and Environment
Department of Geography - University of Berne
Hallerstrasse 12
3012 Bern - SWITZERLAND
www.cde.unibe.ch



> Hi
>
> I am looking into means of generating rainfall (raster) maps from
> site data, and am aware of the basic methods of interpolation
> supported by GRASS such as s.surf.idw and s.surf.tps (now
> s.surf.rst I believe). What I really want however is to interpolate
> using elevation as an independent variable. A suitable method is
> that of Hutchinson, implemented  in ANUSPLIN ( a commercial
> package)  using thin plate splines.
>
> Does anyone know of a GRASS package or freely available code
> which can do this ? I guess that s.vol.rst (referred to in the GRASS
> web pages) would do the job, but has not yet been  implemented.
>
> Any info gratefully received, before I re-invent the wheel.
>
> regards, Chris
>
>
> Chris Kilsby   Lecturer in Hydrology
> Water Resource Systems Research Laboratory
> Dept of Civil Engineering, University of Newcastle upon Tyne
> NE1 7RU    United Kingdom
> Tel + 191-222-5614  Fax + 191-222-6669
> http://www.staff.ncl.ac.uk/c.g.kilsby