[AniMov] Re: SV: debian
cavallini at faunalia.it
Mon Nov 8 20:03:19 CET 2004
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At 19:45, lunedì 08 novembre 2004 you presumably wrote:
> Hi, Paolo -
> Sorry for the misspelling of your name!
No problem - I'm used to it.
> I am not sure that I can help very much on the statistical/computational
> matter, but hwo knows..
Of course you can! Just subscribing to the mailing list, checking the user
requirement, giving your priorities and submitting your problems is a part of
> What is the time schedule for the project?
No schedule - a free project in many respects.
> Important aspects for me, is site fidelity, and site fidelity/home range
> restricted by boundaries,to example fish in a river (restricted by the
> river banks)or sea ducks along a coast. I have tried to analyse sea duck
> habitat use with the arcview3.x animal movement extention, but the
> application looped or went into segmentation fault. The sea ducks do not
> use terrestrial habitats, or freshwater, in winter time, and are
> therefore limited by the coastline.
> Is this interesting subjects for the project? We have now people in the
> nina system who are going to program site fidelity randomized tests for
> a spesific use. I might be able to influence them to write it in a free
> language, like python/perl. I don't think they are used to R, but that's
> just a guess.
I would advice against ad hoc programming. Both GRASS and R can generate
random points (or estract a random sample from existing points; from there,
it should be fairly easy to do your computation, and in a proper gis you can
ask specific questions related to distances from specific features, aspect,
slope, etc, which you can't do easily with ad hoc programs. The interesting
byproduct is that your work can become part of a larger set of programs, so
profiting form the input of other people, helping others in return (the GPL
approach, much closer to science than the proprietary one). But you probably
already know all this.
> The problem with cygwin is that it is very slow. It might depend on the
> allocation of memory, or the graphics card, but the graphical interfaces
> in grass have very long response times. You have to remember that I
> haven't used it extensively, just for exploratory use. Others in NINA
> have used GRASS /Cygwin to analyze satellite images, and prefer that
> before ERDAS Imagine and ARCGIS.
> But for the time being, I am trying to install a completely working GIS
> environment with grass57, postgis and posgresql. I don't find it very
> easy, but it is a kind of challenge..
> I look foreward to keep in tuch -
cavallini at faunalia.it www.faunalia.it
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