[GRASS-user] Remove island

[Yves Jacolin]

Hello,
Thanks for your help. I am wondering if my layer is correct! I try v.extract 
-d input=visibilite output=visibilite_correct list=1-99999, nothing change !
Furthermore, if I choose to fill area by a "random fills  colors for each cat 
values", 'islanf' are emtpy. When I export by v.out.org and use -c options in 
shapefile, qgis display the layer correctly.

If I query the raster layer just before vectorisation, I obtain a 'good' 
answer for polygons (ie, cat value displayed) and for island I just obtain an 
empty windows, but the boundary is selected in the screen...
Acutally I don't understand how polygons are managed in Grass. I thank that I 
read such subject in the past in this list, but I am maybe wrong.

Y.
Le Jeudi 18 Mai 2006 11:35, Markus Neteler a écrit :
> Hamish wrote:
> >>After a vectorisation from a raster obtained by the r.los function, I
> >>get  polygon whom own some island inside them. I would like to remove
> >>this island? Here :http://yjacolin.gloobe.org/problem.htm, three
> >>pictures :
> >> 1/ what I expect to
> >> 2/ What I get
> >>
> >>I obtain the first picture by using sql resquest (display only
> >>value=1).
> >
> >[url broken, it's .html]
> >
> >
> >use v.extract list=1-99999  and/or  v.extract -d
>
> See also here:
> 
> http://grass.gdf-hannover.de/twiki/bin/view/GRASS/GrassSixTutorialFaq#7_Rem
>oving_isles
>
> Added to v.extract's manual page now.
>
> Markus

-- 
Yves Jacolin
-------------
http://yjacolin.gloobe.org
http://softlibre.gloobe.org