[GRASS-user] v.generalize / reanimation of dead lines ?

[Dylan Beaudette]

On Thursday 28 August 2008, Hamish wrote:
> Peter:
> > > when trying to derive a continous coast_line_ from the
> > > GSHHS data set. For this, the data was reduced using
> > > v.generalize (douglas, threshold=0.001).
> > >
> > > Since the reduced coastline consists of several lines (with
> > > individual categories), I tried v.build to snap them
> > > together into a (hopefully) one long and friendly line.
> > >
> > > Alas, v.build throws:
> > >
> > > V2_read_line_nat(): Attempt to read dead line 26199
> > >
> > > Any advice how to "reanimate" the dead lines ??
>
> two ideas:
> before:  v.build.polylines
> after:   v.extract list=1-999999
>
> do lines actually seem to be missing or was it unclean deletion?
>
>
> Hamish
>

I have noticed this behavior as well when using v.generalize. I will try and 
dig up the exact situation that caused it-- but I am pretty sure that the 
initial linework was correct = unclean deletion.

Cheers,

Dylan


-- 
Dylan Beaudette
Soil Resource Laboratory
http://casoilresource.lawr.ucdavis.edu/
University of California at Davis
530.754.7341