[Qgis-user] Extraction of hydrographic network from DEM --SRTM--LANDSAT8--ASTER OPTICAL

[jean Lukusa]

Thanks for the tip!

Exploration  Geologist
+243 812156128(wattsap,imo)
+243 973741744
+243 840367401

Le lun. 3 juin 2019 13:59, Nicolas Cadieux <nicolas.cadieux at archeotec.ca> a
écrit :

> Hi,
>
> Google for Saga and water basin or Chanel.  You will find tutorials. SRTM
> have some vector water masks that you can download from NASA. The scale may
> be good enough for you but smaller streams and lake will not be found, so
> as anything north and south of 60 degrees.  As for doing is yourself with
> optical images, perhaps the semi automatic classification plugin?  This
> will be the most difficult approach if you don’t know what you are doing.
> That’s why people have PHD’s in RS!
>
> Nicolas
>
> > Le 2 juin 2019 à 09:34, jean Lukusa <lukusam at gmail.com> a écrit :
> >
> > Hi all!
> > I would  like  to  know  how  hydrographic  network  shapefiles  can
> be  extracted  from DEM ,SRTM, Landsat 8 and OPTICAL ASTER  using  Qgis3.6.3
> >
> > Exploration  Geologist
> > +243 812156128(wattsap,imo)
> > +243 973741744
> > +243 840367401
> > _______________________________________________
> > Qgis-user mailing list
> > Qgis-user at lists.osgeo.org
> > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
> > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/qgis-user/attachments/20190603/052fa6af/attachment.html>