[GRASS-user] Area between drainage networks

[Luis Moreira]

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.





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