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
Biology (UCT)
Plant Conservation Unit
Department of Botany
University of Cape Town
Rondebosch 7701
South Africa
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