v.prune loses attributes ??

[Olga Waupotitsch]

In info.grass.programmer you write:

>Hi there

>I've just been playing around with vector-to-sites conversion and 
>s.surf.idw in order to create a surface from contours (yes, I know about
>r.surf.contour). Anyway, in order to reduce the number of points for the first
>experiments, I used v.prune on my contour file (~30,000 points) to reduce it
>by about 60%, ran v.support (got lots of warnings about matching labels),
>v.to.sites, s.out.ascii/s.in.ascii to get sites for the current region only
>(any better ideas?) and finally s.surf.idw.
>The surface produced by s.surf.idw had some funny holes in it, which made me
>examine the intermediate results and so I found out that apparently
>v.prune tends to overlook some labels. These tend to be on short lines
>that get reduced to nodes only.
>Is that accepted behaviour, a bug, a feature??
>And am I supposed to do something about the warnings from v.support?
>Any hints welcome,

>Martin

>--
>Martin Ameskamp, Inst. f. Informatik I (Computing Dept.)
>Kiel University, Olshausenstr. 40, 24118 Kiel, Germany
>Fax: ++49 431 8804054, Voice: ++49 431 8804474, 
>email: ma at informatik.uni-kiel.d400.de



Can you please put the vector file on our ftp site under incoming/OGI
I think I know why this is happenning. v.prune just copies over the
attribute file. But if the line is made into a node, then the attribute
for this line needs to be changed from line attribute to point attribute
otherwise v.support can't attach this attribute.
Olga