[GRASSLIST:88] Re: jumping moving window analysis

[Markus Neteler]

Hi,

here is a half-done v.cellstats. It's updated to the
old/new GRASS 6 sites wrapper (bad approach!), compiles,
but outputs nearly nothing as the G_put_sites() wrapper
function doesn't write attributes.

http://mpa.itc.it/markus/tmp/v.cellstats.tar.gz

Someone may take it and updated to the GRASS 6 Vect_() API.

Markus

On Tue, Mar 14, 2006 at 10:43:49AM -0300, Carlos Guâno Grohmann wrote:
> That's the kind of thing you could do with s.cellsats, back in
> grass54. unfortunately, it has not been ported to grass6 yet...
> 
> Carlos
> 
> On 3/14/06, Martin Wegmann <wegmann at biozentrum.uni-wuerzburg.de> wrote:
> > hello,
> >
> > I am stuck with a solution how to compute a kind of jumping moving window.
> >
> > We have a 1 Km DEM (gtopo30) and a 90 m DEM (SRTM) and would like to know how
> > high the diversity of the srtm90 inside a gtopo30 pixel is. This could be
> > achieved by a jumping moving window which is aligned to the gtopo30 but
> > computes the diversity on the srtm90. The output would be a diversity map
> > based on srtm90 but with a resolution of the gtopo30.
> >
> > r.le has an option called systematic continuous but writes the output into a
> > file rather than creating a new map.
> >
> > r.neighbors is not a solution because it computes the diversity for each pixel
> > continuous and not un-continuous like we wish.
> >
> > any solutions or ideas are welcome, regards, Martin
> >
> >
> >
> > --
> > Martin Wegmann
> >
> > DLR - German Aerospace Center
> > German Remote Sensing Data Center
> > @
> > Dept.of Geography
> > Remote Sensing and Biodiversity Unit
> > &&
> > Dept. of Animal Ecology and Tropical Biology
> > University of Wuerzburg
> > Am Hubland
> > 97074 Würzburg
> >
> > phone: +49-(0)931 - 888 4797
> > mobile: +49-(0)175 2091725
> > fax:   +49-(0)931 - 888 4961
> > http://www.biota-africa.org
> > http://www.biogis.de
> >
> >
> 
> 
> --
> +-----------------------------------------------------------+
>               Carlos Henrique Grohmann - Guano
>   Geologist M.Sc  - Doctorate Student at IGc-USP - Brazil
> Linux User #89721  - carlos dot grohmann at gmail dot com
> +-----------------------------------------------------------+
> _________________
> "Good morning, doctors. I have taken the liberty of removing Windows
> 95 from my hard drive."
> --The winning entry in a "What were HAL's first words" contest judged
> by 2001: A SPACE ODYSSEY creator Arthur C. Clarke
> 

-- 
Markus Neteler     <neteler itc it>       http://mpa.itc.it
ITC-irst -  Centro per la Ricerca Scientifica e Tecnologica
MPBA - Predictive Models for Biol. & Environ. Data Analysis
Via Sommarive, 18        -       38050 Povo (Trento), Italy