[GRASS5] v.out.ogr question

[Radim Blazek]

On Wednesday 17 March 2004 18:23, Markus Neteler wrote:
> On Fri, Mar 12, 2004 at 05:58:40PM +0100, Otto Dassau wrote:
> > Hi,
> >
> > I used the module v.out.ogr in GRASS5.7 to export polygons but missed
> >
> > the parameter 'type=area'. The result was a warning:
> > > WARNING: Requested types: points and lines, but (additionally) areas
> > > found. Check 'type' parameter.
> > > 3426 features written
> > > WARNING: 3426 features without category written
> >
> > but the map was also exported with lines instead of areas. I don't
> > understand why the module explains a mistake but still exports
> > the data. Wouldn't it make more sense to simply stop after warning,
> > so the user has to add/modify the missing parameter?
>
> Otto,
>
> I have made a test with a map containing a single area:
>
> v.info ammprv | grep Number
>
>  |   Number of points:       0               Number of areas:      1     |
>  |   Number of lines:        0               Number of islands:    1     |
>  |   Number of boundaries:   1               Number of faces:      0     |
>  |   Number of centroids:    1               Number of kernels:    0     |
>  |   Number of dblinks:      1                                           |
>
> GRASS 5.7.-cvs:~/test > v.out.ogr ammprv dsn=ammprv layer=ammprv
> WARNING: Requested types: points and lines, but (additionally) areas found.
>          Check 'type' parameter.
> 1 features written
> WARNING: 1 features without category written
>
> -> Strange: I would expect 0 features written.

Why strange? Requested type is 'line,boundary' (default) and there is 1 boundary
in ammprv and that boundary is exported.

Radim