[GRASSLIST:3393] Re: Removing boundaries on vector maps

Radim Blazek blazek at itc.it
Tue May 11 13:42:13 EDT 2004

I have imported SWlab's data, it seems that all desired lines have 
major1 > 0
and the frame has 
major1 = -99999
v.extract input=u41 output=u41_clean where='major1 > 0'
should do what you want.


On Monday 10 May 2004 22:15, Luis E Menoyo wrote:
> I'm in the same predicament.  I've got a series of 7.5min DLGs (hydro,
> transpostation, boundaries) that I have v.patch'ed together and am now
> looking for a way to remove the duplicate border vectors.
> According to the 5.7 manual entry for v.patch:
> "Any vectors that are duplicated among the maps being patched together
> (e.g., border lines) will have to be edited or removed after v.patch is
> run.  Such editing can be done automatically using v.clean (tool=svtlx). "
> I received undesirable results when running v.clean tool=rmdupl.  After
> running the command many boundary vectors remained and several vctors
> depicting actual features were removed.  It may be that if the boundary
> lines were not set as a particular category they may have to be removed
> manualy using v.digit.
> Can anyone here shed some light on the subject?
> Thanks,
> Luis.
> SWlab <swlab at cornell.edu>
> Sent by: owner-GRASSLIST at baylor.edu
> 05/09/04 02:57 PM
> Please respond to swlab
>         To:     <grasslist at baylor.edu>
>         cc:
>         Subject:        [GRASSLIST:3379] Removing boundaries on vector
> maps
> Hello,
> I have a number of vector maps, each representing stream paths over a USGS
> 7.5' quad. The boundaries of the quads are present on each map. Is there a
> scriptable way to remove those boundaries before or after patching the
> maps ?
> Thanks for any hint

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