s.vol.rst - precip interpolation ?

Bernhard Sturm sturm at datacomm.ch
Tue Apr 4 10:34:25 EDT 2000

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...

Bernhard Sturm
Centre for Development and Environment
Department of Geography - University of Berne
Hallerstrasse 12

> 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

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