<div dir="ltr">For this kind of analysis toy should give a look to the algorithms provided through Processing. <div>GRASS, SAGA and TauDEM have a lot of tools to do hydromorphological analysis.<div><br></div><div>giovanni</div>
</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">2013/12/12 image <span dir="ltr"><<a href="mailto:lcelati@latitude-geosystems.com" target="_blank">lcelati@latitude-geosystems.com</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Dear all,<br>
<br>
>From my Raster DEM, i would like extract Thalweg and Drainage divide<br>
(ridges) 's 3D vectors.<br>
<br>
According to you, is it possible to do that with qgis?<br>
<br>
In advance, Thank you.<br>
<br>
Regards.<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
--<br>
View this message in context: <a href="http://osgeo-org.1560.x6.nabble.com/Extraction-3D-vectors-ridges-Thalweg-from-raster-DEM-tp5093958.html" target="_blank">http://osgeo-org.1560.x6.nabble.com/Extraction-3D-vectors-ridges-Thalweg-from-raster-DEM-tp5093958.html</a><br>

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</blockquote></div><br><br clear="all"><div><br></div>-- <br>Giovanni Allegri<br><a href="http://about.me/giovanniallegri" target="_blank">http://about.me/giovanniallegri</a><br>blog: <a href="http://blog.spaziogis.it" target="_blank">http://blog.spaziogis.it</a><br>
GEO+ geomatica in Italia <a href="http://bit.ly/GEOplus" target="_blank">http://bit.ly/GEOplus</a>
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