> SAGA has a very optimized code (about 10% disk space of a GRASS > install), is very fast and is designed specifically to > terrain/hydrology analysis, instead of being a general-purpose GIS > like GRASS.
Well, SAGA is quite general porpuse too, through various low level modules for vector and grid management. I add that it has geostatistical analysis tools, imagery classification, various algorithms for simulations (like genetic algorithms), etc. > > On Sat, Jul 11, 2009 at 10:36, G. Allegri<[email protected]> wrote: > > Hi Paolo. > > SAGA community is apprently small. The dev team is small, but they work > > hard, even if it doesn't appear from the SAGA site. > > I've just chatted with its major developer (Volker) and he was asking > help > > to mantain the build chain updated and give a refresh to the site (wiki > is a > > bit outdated, etc.). The latest version build binary is not available, > but > > there's a quite new snapshot at Laserdata [1], where some of its > developers > > work. > > > > I said the community is large, even if its not so noticeable. I have many > > collegues that use it (more then GRASS), also through the very good RSAGA > > interface for R [2]. Tomislav Hengl has lot of material about this [3] > > > > Why I'm so much interested in SAGA: > > > > I find it has all the features to make lot of (vectorial, grid and > imagery) > > analysis and automation. It includes functions that GRASS doesn't offer > out > > of the box, that you can find (partly) in the latter user manual (a > litlle > > bit outdated) [4]. > > I don't have time in this moment to list all the differences between it > anf > > GRASS, and please don't misunderstand me: I love GRASS, and will continue > > using it too... but: > > > > 1 - the GRASS Windows version situation is a major problem, while SAGA > > works smooth both on Windows and Linux. I don't know which version you > used, > > I haven't tried the linux version yet, but I don't see bad feedbacks in > the > > resent ML posts. > > > > 2 - It doesn't need to be installed: I use it from my pen drive :) > > > > 3 - It doesn't work with topology. Yes, it can be seen as a missing, > > important, feature for someone and for some uses, but the end users often > > prefer to work directly on shapefiles, without the overhead of > clean/build > > issues during GRASS imports... And that's one of the points that make > QGIS, > > Gvsig, etc. more usable. > > > > 4 - The latest version (that I'm going to buid), links well with the the > > latest libraries (GDAL, PROJ) and Python 2.5. > > > > 5 - While the GRASS dev team is putting much effort in the GUI > development, > > SAGA GUI is a bit secondary. It would gain great benefit from an > integration > > with QGIS... > > > > Ok, this is just my personal, subjective, overview. But I repeat I don't > > wnat to discourage GRASS usage, but to highlight this good alternative... > > > > Giovanni > > > > [1] http://www.laserdata.at/saga_packages.html > > [2] http://cran.r-project.org/web/packages/RSAGA/index.html > > [3] http://spatial-analyst.net/wiki/index.php?search=rsaga&go=Go > > [4] > > > http://garr.dl.sourceforge.net/sourceforge/saga-gis/SAGA2_UserGuide_Cimmery_20070401.pdf > > > > 2009/7/11 Paolo Cavallini <[email protected]> > >> > >> G. Allegri ha scritto: > >> > SAGA algorithms were the basis on which Sextentegis was developed. > Then > >> > this was integrated into Gvsig... Why don't make happen the same for > >> > SAGA? :) > >> > >> Hi Giovanni. > >> I have tested saga a few years ago, and I was rather disappointed by its > >> (lack of) stability on Linux. Also, the apparently very small community > >> was a bit worrisome to me. More generally, I do not understand well what > >> is the advantage of using saga rather than grass: have you checked their > >> different strengths and weak points? > >> Thanks a lot. > >> -- > >> Paolo Cavallini: http://www.faunalia.it/pc > >> _______________________________________________ > >> Qgis-user mailing list > >> [email protected] > >> http://lists.osgeo.org/mailman/listinfo/qgis-user > > > > > > _______________________________________________ > > Qgis-user mailing list > > [email protected] > > http://lists.osgeo.org/mailman/listinfo/qgis-user > > > > > > > > -- > Carlos Henrique Grohmann - Geologist D.Sc. > a.k.a. Guano - Linux User #89721 > ResearcherID: A-9030-2008 > > http://digitalelevation.blogspot.com > > http://www.igc.usp.br/pessoais/guano > _________________ > Can’t stop the signal. > _______________________________________________ > Qgis-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/qgis-user >
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