[STATSGRASS] Re: [GRASS-user] Simulation in grass 6

[Rainer M. Krug]

Hamish 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.
> 
> 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)

Thanks a lot - I am subscribed to this list now - strange that I 
overlooked that lisat before...

> 
>> 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.

Sounds very interesting - I'll take a look at it.

> 
> Learn python in 10 min:  http://www.poromenos.org/tutorials/python

Python doesn't look as difficult as I thought the first time I looked at 
it (a few years back...). Looks similar to what I am used to in Delphi.

> 
> 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

Looking at the document, I must say it seems to be a usefull approach to 
use Python - and it is crossplatform. One thing which I did not see that 
quickly is how I can execute grass commands from python - I guess it is 
easy, but I didn't find it when I looked at the document.

Thanks a lot for your usefull and very helpfull hints,

Rainer


>      http://freegis.org/cgi-bin/viewcvs.cgi/grass6/swig/python/
> 
> Hamish
> 
> 
> 
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Rainer M. Krug, Dipl. Phys. (Germany), MSc Conservation
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Plant Conservation Unit
Department of Botany
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