[GRASS-user] nan values by v.generalize

[Andre Hauptfleisch]

I'll try to upload the vector layer I used to an ftp site. What would the
best output format be? DXF?


On Dec 14, 2007 4:13 PM, Moritz Lennert <mlennert at club.worldonline.be>
wrote:

> On 14/12/07 14:48, Andre Hauptfleisch wrote:
> > Good day guys,
> >
> > I came across a problem in the v.generalize module. I do the following:
> > v.generalize input=myvect at test output=myvect_smooth type=line
> > method=hermite threshold=10
> >
> > I then do a v.out.svg and noticed the following line in the svg file:
> > <path gg:cat="31" d="M 111.500000 -80.500000 l 8.734748 4.771559
> > 9.907176 6.337565 nan nan nan nan nan nan nan nan nan nan" />
> >
> > Any idea how I can get rid of those nan's? They cause stuff such as
> > v.to.rast to hang.
>
> I cannot reproduce this with the speafish60 dataset:
>
> v.out.svg input=roads at PERMANENT output=roads type=line precision=6 layer=1
>
> and
>
> v.generalize input=roads at PERMANENT output=roads_smooth type=line
> method=hermite threshold=10 look_ahead=7 reduction=50 slide=0.5
> angle_thresh=3 degree_thresh=0 closeness_thresh=0 betweeness_thresh=0
> alpha=1.0 beta=1.0 iterations=1 layer=1
>
> v.out.svg input=roads_smooth at user1 output=roads_smooth type=line
> precision=6 layer=1
>
> Both give me svg files without nan's.
>
> Can you reproduce this with spearfish data ? Can you look at the line
> with cat=31 in your grass vector (maybe in v.digit) and see if there is
> anything abnormal about it ?
>
> Moritz
>



-- 
Groete,
Andre Hauptfleisch

M: 082 5722 469
F: 086 687 1106
E: ahaupt at gmail.com
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