You would do a spatial joint between the river and basins to add the basin information to the rivers layer.
You would then symbolize the rivers by category, using the basin attribute as the categorizing field.
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.
On 8/6/2020 4:13 PM, C Hamilton wrote:
I was wondering if anyone had any idea on how one would go about creating these types of maps in QGIS.
Assume the watershed polygons are available as well as the river data.
Anyway I think these pictures are stunning.
Thanks,
Calvin
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