[GRASS-user] exporting areas to shapefiles without filling holes

[Markus Neteler]

On Thu, Apr 9, 2009 at 10:38 AM, Hamish <hamish_b at yahoo.com> wrote:
>
>> Hamish wrote:
>> > I've got a grass vector map containing some areas with holes.
> ...
>> > after exporting with 'v.out.ogr type=area' to a shapefile, when I load
>> > the shp file into QGIS 0.8.1 I see that all the holes have been filled
>> > in.
> ...
>> > what am I doing wrong?
>
> Markus Metz:
>> Maybe use v.out.ogr -c?
>
> yup, that's it. I'd focused on the shapefile example in the man page
> and totally missed the blinking red letters at the top:

I am also regularly missing that (and only now understand how to
solve this island problem).

Any chance to generate a warning if islands are there and -c not
given? Only then the problem + solution is obvious...

Markus