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Watershed polygons and river lines for the US are available from the
USGS.<br>
You would do a spatial joint between the river and basins to add the
basin information to the rivers layer.<br>
You would then symbolize the rivers by category, using the basin
attribute as the categorizing field.<br>
The rivers appear to have their line width determined by their
hierarchy in the tributary network. I'm not sure if the USGS data
has an indication of flow magnitude, which you would use to set the
line width.<br>
<br>
On 8/6/2020 4:13 PM, C Hamilton wrote:
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<div dir="ltr">I was wondering if anyone had any idea on how one
would go about creating these types of maps in QGIS.
<div><br>
</div>
<div><a
href="https://www.visualcapitalist.com/maps-worlds-watersheds/">https://www.visualcapitalist.com/maps-worlds-watersheds/</a> </div>
<div><br>
</div>
<div>Assume the watershed polygons are available as well as the
river data.</div>
<div><br>
</div>
<div>Anyway I think these pictures are stunning.</div>
<div><br>
</div>
<div>Thanks,</div>
<div><br>
</div>
<div>Calvin</div>
</div>
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