Hi On Fri, Jan 29, 2021 at 12:32 AM Azzurra Lentini <azzurralent...@gmail.com> wrote:
> Hi List, > I have a raster file DTM (altitude attribute in the pixels). I > reclassified this raster in 4 classes of altitude and I need to calculate > for each class the area (in how many square meters is each different class > extended). > I can for example transform the raster file reclassified into a vector > file and calculate the area, but is it possible to do without any > vectorialization and so directly calculating it from the raster file? > > I you're willing to try using GRASS GIS, then the module r.stats is what you want https://grass.osgeo.org/grass78/manuals/r.stats.html > Thanks, Azzurra > > -- > Lecturer GIS University "Roma Tre" > Consultant Environmental Risk Prevention and Hydrogeology > AZZURRA LENTINI > ++++++++++++++++++++++++++ > Italy Mobile Tel.: **(39) 338 24 40 676 > ++++++++++++++++++++++++++ > SKYPE azzurrahydro > ++++++++++++++++++++++++++ > > *azzurralent...@gmail.com <azzurralent...@gmail.com>* > > *azzurra.lent...@uniroma3.it <azzurra.lent...@uniroma3.it> * > ++++++++++++++++++++++++++ > *Par respect pour l'environnement,* > > *n'imprimez ce mail qu'en cas d'absolue nécessité* > > > > > > _______________________________________________ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user > -- Micha Silver Ben Gurion Univ Sde-Boker Remote Sensing Lab cell: +972 (52) 3665918
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