[Qgis-user] How to Create These type of Watershed Maps in QGIS

[chris hermansen]

Calvin and list

On Thu, Aug 6, 2020 at 3:14 PM C Hamilton <adenaculture at gmail.com> wrote:

> I was wondering if anyone had any idea on how one would go about creating
> these types of maps in QGIS.
>
> https://www.visualcapitalist.com/maps-worlds-watersheds/
>
> Assume the watershed polygons are available as well as the river data.
>

Well if you already have the hydrologic network and the watershed polygons,
then you need to intersect the hydrologic network with the watershed
polygons in order to transfer the watershed polygon identifier to the
watercourses therein.  At that point you can colour the watercourses
according to the watershed polygon identifier.

Creating good watershed polygons is a fair bit of work, usually starting
with a digital elevation model.


-- 
Chris Hermansen · clhermansen "at" gmail "dot" com

C'est ma façon de parler.
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