[GRASS-user] Area between drainage networks

Margherita Di Leo diregola at gmail.com
Sat Dec 21 00:04:36 PST 2019


Hi Luis,

Not sure I understand, but What if you draw a large polygon that covers both rivers, then you clip against the rivers and calculate the area of the resulting polygon. Does that help?

Kind regards,

Inviato da iPhone

> Il giorno 20 dic 2019, alle ore 16:40, Luis Moreira <lfsmmoreira at gmail.com> ha scritto:
> 
> ´╗┐Hello everyone, 
> 
> I'd like to obtain the area between two drainage networks. The difference
> between them is due to different calculation methods. 
> 
> <http://osgeo-org.1560.x6.nabble.com/file/t385794/photo5181593200849168458.jpg> 
> The image above illustrates the methodology of mesuring the "error" between
> two drainage networks.
> 
> Each one of the drainage networks is in a shapefile, and I need the sum of
> all the areas between the segments of the drainage networks, so that I can
> mesure the difference between them.
> 
> How could I do that with GRASS?
> 
> Thanks in advance.
> 
> 
> 
> 
> 
> --
> Sent from: http://osgeo-org.1560.x6.nabble.com/Grass-Users-f3884509.html
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