I have some kind of probability map with a resolution of about 90m. Now I want
to resample this map for press information print. The map has some kind of
distortions where you have small areas (just a few cells) where the values
change quickly and the map looks very "turbulent".
I want to use r.resamp.rst for this purpose, and I experimented already with
the tension parameter. But this alone does not give me satisfactory results.
From the manual I take it that there is also a smoothing parameter where one
can give a smoothing raster as parameter. But I really have no clue how this
raster should look like.
Taking the vector version of r.resamp.rst one can give a number as smoothing
value which is pretty easy to understand ;-), but what kind of values are
expected for the smoothing raster? Can I just give a constant raster map as
smoothing parameter with a value of e.g. 0.1? Then why use a raster map as
parameter?
I have some kind of probability map with a resolution of about 90m.
Now I want to resample this map for press information print. The map
has some kind of distortions where you have small areas (just a few
cells) where the values change quickly and the map looks very
"turbulent".
smooth it with a r.neighbors mean or median filter?
r.neighbors was exactly what I was looking for. Sometimes I really get lost in
the functionality of GRASS
But just to satisfy my curiosity: How should a smoothing raster for
r.resamp.rst look like or how would I create one?
Best whishes
Frank
On Wednesday 30 January 2008 13:04:51 Hamish wrote:
Frank Broniewski wrote:
> I have some kind of probability map with a resolution of about 90m.
> Now I want to resample this map for press information print. The map
> has some kind of distortions where you have small areas (just a few
> cells) where the values change quickly and the map looks very
> "turbulent".
smooth it with a r.neighbors mean or median filter?
On Jan 30, 2008 4:45 PM, Frank Broniewski <liste@geo-dienstleistung.de> wrote:
r.neighbors was exactly what I was looking for. Sometimes I really get lost in
the functionality of GRASS
But just to satisfy my curiosity: How should a smoothing raster for
r.resamp.rst look like or how would I create one?
