[GRASS-user] Simulation in grass 6

Rainer M. Krug Rainer at krugs.de
Tue Sep 25 10:34:25 EDT 2007


Michael Barton wrote:
> Ranier,
> 
> 
> On 9/25/07 2:02 AM, "Hamish" <hamish_nospam at yahoo.com> wrote:
> 
>> Rainer M. Krug wrote:
>>
>>> I am planning to write a spatial simulation model, simulating the spread
>>> of alien species on a landscape scale by using grass.
>>> My question how I should write the simulation model, i.e. in which
>>> scripting language. I am using Linux and have quite a bit of experience
>>> with R, so I thought that R (together with spgrass6) would be a nice
>>> scripting language to write the simulation and sending the grass
>>> commands through to grass, because it offers me quite a bit more
>>> concerning strtucturing on the modelling side then using a normal shell
>>> script
>>> But the simulation should also run under Windows and I don't have any
>>> experience with grass and R under windows.
> 
> You might want to take a look at the wildfire modeling routines already in
> GRASS. I think that with minimal work, these could be modified to become
> general spread-modeling routines. I've used these (with some difficulty) to
> model the spread of other phenomena than wildfires and would love to have
> general spread routines in GRASS.

Good idea - I haven't thought about them. I'll see what I can do with them.

> 
>> It sounds very well suited for Linux or MacOSX, but I've little idea about the
>> GRASS+R Windows situation. Maybe someone on the statsgrass mailing list knows?
>> (taking the liberty to cc)
>>
>>> I have the following questions:
>> ..
>>> 3) Is any other scripting language more suitable for what I want to
>>> achieve (I have no experience with C / C++, but quite a bit with Delphi.
>>> I have never used the likes of perl et al. and bash scrips seem a bit
>>> awkward to me for bigger projects.)?
>> You could try python. The next version of GRASS will use python heavily for
>> the
>> GUI, so expect lots of example scripts, help on the mailing list from fellow
>> travelers, and tight integration with the code.
>>
>> Learn python in 10 min:  http://www.poromenos.org/tutorials/python
>>
>> Also there is a SWIG/Python interface to any needed GIS library functions,
>> which is pretty cool, although the grass modules generally give you what you
>> need without having to resort to using any low-level libgis functions.
>>
>> see  http://grass.gdf-hannover.de/wiki/GRASS_and_Python
>>      http://freegis.org/cgi-bin/viewcvs.cgi/grass6/swig/python/
>>
>> Hamish
> 
> I also want to second Hamish's mention of Python. It is a powerful and
> (relatively) easy to learn language that will become increasingly important
> to GRASS in the future. Extensions scipy and numpy give it additional
> abilities.
> 
> Michael
> 
>>
>>
>>       
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>>
> 
> __________________________________________
> Michael Barton, Professor of Anthropology
> Director of Graduate Studies
> School of Human Evolution & Social Change
> Center for Social Dynamics & Complexity
> Arizona State University
> 
> phone: 480-965-6213
> fax: 480-965-7671
> www: http://www.public.asu.edu/~cmbarton
> 
> 


-- 
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Rainer.Krug at uct.ac.za

RKrug at sun.ac.za WILL BE DISCONTINUED END OF MARCH

Rainer M. Krug, Dipl. Phys. (Germany), MSc Conservation
Biology (UCT)

Plant Conservation Unit
Department of Botany
University of Cape Town
Rondebosch 7701
South Africa

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email:	Rainer.Krug at uct.ac.za
       	Rainer at krugs.de




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