[GRASSLIST:2645] RE: interpolation of area precipitation with s.surf.idw

Daniel Victoria daniel_victoria at yahoo.com
Mon Feb 16 08:30:48 EST 2004


Well,

That was my solution to the problem and, even though
not perfect, it works...

Setting the postgre is very simple, I had no clue as
to how it workd until last week...

If you need any help just send me an e-mail

Cheers

Daniel
--- Alexander Fritz <Alex_Fritz at gmx.net> wrote:
> Hello I'm not very familar with postgre. Does that
> mean that I have to set
> up an SQL database?
> 
> 
> -----Original Message-----
> From: daniel_victoria at yahoo.com
> [mailto:daniel_victoria at yahoo.com] 
> Sent: Monday, February 16, 2004 1:09 PM
> To: Alexander Fritz; 'GRASS_list'
> Subject: Re: [GRASSLIST:2633] interpolation of area
> precipitation with
> s.surf.idw
> 
> 
> Hello,
> 
> I ran into the same problem last week, but using
> daily
> data. Some stations did not have data for a specific
> day and so forth, that means, depending on the day,
> you have a different set of data. The problem is
> that,
> you can't put zero for a station with no observation
> since 0 rainfall is different from no data!!!
> 
> What I did is, using postgree, I get only the
> rainfall
> that contain observations for one day, create a
> separate sites file for that day and, interpolate
> and
> then move to the next day. All this can be done
> using
> a very simple bash script.
> 
> Of course, if there where a nodata value for sites,
> we
> could use only one site file for all data, but I
> don't
> know if there is such thing...
> 
> 
> 
> 
> --- Alexander Fritz <Alex_Fritz at gmx.net> wrote:
> > Dear GRASS users,
> > 
> > I'm trying to interpolate area precipitation maps
> > with s.surf.idw in
> > 5-minute-steps. I have rain gage data in 5-minute
> > steps for several
> > stations. Unfortunately not every station has
> > recorded the whole time I'm
> > interested in. Is it possible to fill these gaps
> > with something like "no
> > data" and/or is there an option for s.surf.idw
> which
> > excludes the stations
> > with no recorded data at this time step. Any
> > suggestions? Thank you in
> > advance for any help.
> > 
> 
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