For this kind of analysis toy should give a look to the algorithms provided through Processing. GRASS, SAGA and TauDEM have a lot of tools to do hydromorphological analysis.
giovanni 2013/12/12 image <[email protected]> > Dear all, > > From my Raster DEM, i would like extract Thalweg and Drainage divide > (ridges) 's 3D vectors. > > According to you, is it possible to do that with qgis? > > In advance, Thank you. > > Regards. > > > > > > > > > -- > View this message in context: > http://osgeo-org.1560.x6.nabble.com/Extraction-3D-vectors-ridges-Thalweg-from-raster-DEM-tp5093958.html > Sent from the Quantum GIS - User mailing list archive at Nabble.com. > _______________________________________________ > Qgis-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/qgis-user > -- Giovanni Allegri http://about.me/giovanniallegri blog: http://blog.spaziogis.it GEO+ geomatica in Italia http://bit.ly/GEOplus
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