[GRASSLIST:8633] Re: Interpolating and mapping the output of ecosystem models with GRASS

[Thomas Adams]

I would second David's comments. GRASS does these kinds of analyses 
easily within shell & Perl scripts, which I have setup to run routinely. 
Please email me if you want any concrete examples.

Regards,
Tom


David Finlayson wrote:

>I think this type of thing is very straight forward in GRASS. It is
>one of the reasons I have started using GRASS instead of ArcGIS. It is
>very easy to write a shell script (or Python or Perl, etc) to perform
>a run of your model, convert the model output to GRASS format,
>post-process the output and build visualizations. I do this for wave
>and sediment transport models and there are many other disciplines
>represented by people on this mailing list.
>
>The interpolation and "masking" of irrelevant data is a key strength
>of GIS in general and something that is trivial in GRASS. (usually
>only a few GRASS commands depending on how sophisticated your good/bad
>data criteria is).
>
>David
>
>On 10/13/05, Luigi Ponti <lponti at infinito.it> wrote:
>  
>
>>Dear GRASS Users Mailing List,
>>
>>I would like to ask some advice on using GRASS to map the output of
>>weather-driven population models for ecosystem analysis.
>>
>>Our group is considering GRASS as a way to map the georeferenced output
>>of the ecosystem models developed in our lab. In short, once
>>meteorological data (i.e., model input) and geographic data are acquired
>>for a particular landscape, an ecosystem model is run for each weather
>>station location of interest. Therefore, the output of the model
>>consists of a summary table combining the point locations of the weather
>>stations with the output value of interest.
>>
>>In order for this output to be mapped, an interpolation process is
>>needed to retrieve the spatial distribution of the values estimated by
>>the ecological model across the landscape. Another critical point is the
>>ability to 'clip' and eliminate areas which are not of interest to the
>>study, such as elevation which is too high, or other tracts of land or
>>water which are not of interest to the study.
>>
>>Would GRASS be able to interpolate such spatial distribution and also
>>'clip' the out-of-interest areas? I am new to GRASS but I assume that
>>such capabilities are, at least potentially, already in place in GRASS.
>>What I cannot figure out is the amount of work needed to implement such
>>functionalities starting from the summary output table that I mentioned
>>above. Any hint is appreciated.
>>
>>Kind regards,
>>
>>Luigi Ponti
>>Visiting Scholar
>>University of California, Berkeley
>>Environmental Science, Policy & Management
>>lponti at nature.berkeley.edu
>>
>>
>>    
>>
>
>
>--
>David Finlayson
>Marine Geology & Geophysics
>School of Oceanography
>Box 357940
>University of Washington
>Seattle, WA  98195-7940
>USA
>
>Office: Marine Sciences Building, Room 112
>Phone: (206) 616-9407
>Web: http://students.washington.edu/dfinlays
>
>  
>


-- 
Thomas E Adams
National Weather Service
Ohio River Forecast Center
1901 South State Route 134
Wilmington, OH 45177

EMAIL:	thomas.adams at noaa.gov

VOICE:	937-383-0528
FAX:	937-383-0033