[GRASS-user] Recommended v.select relate matrix?

Moritz Lennert mlennert at club.worldonline.be
Sat Jul 22 03:47:32 PDT 2017

On 22/07/17 03:16, Jeshua Lacock wrote:
> Greetings,
> Could someone possibly recommend a spatial relation matrix that would 
> select practically identical lines, but not quite identical?
> Just detecting if lines overlaps or crosses, etc. is not sufficient for 
> my purposes.
> I have read:
> https://en.wikipedia.org/wiki/DE-9IM
> And its still not clear to me what matrix would be suitable for 
> selecting practically identical lines. I have tried many possibilities, 
> but I am doing trial and error with educated guesses. Everything I have 
> tried is either not strict enough or too strict and doesn’t select anything.
> Please see the attached image for what I mean by practically identical 
> lines. I would like the purple lines to select the orange lines and only 
> the orange lines. (I am only showing similar lines that I would like to 
> select to avoid confusion.)

Actually I think that showing us the example with all lines will make it 
easier to think about solutions.

A small buffer around the selecting lines might help ?


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