[GRASS-user] Extracting non-overlapping lines

Dwight Needels needels at translucida.com
Tue Jul 21 19:06:03 EDT 2009

Hi all,

I have two nearly identical line vectors, and I would like to extract  
the lines that differ between the two vectors into a third vector.  
Specifically, I want to isolate the connecting lines that were  
generated by v.net operation=connect. Something like:

[map_C = map_A   NOT   map_B]  for line features.

I thought I would be able to use v.overlay with operator=not, but it  
it appears to require that btype=area. It also appears that v.select  
allows only operator=overlap.

Can someone point me in the right direction?

I am using William Kyngesburye's 6.4.0RC3 on MacOS 10.5.7.



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