[GRASS-user] Removing small areas using v.clean

Markus Metz markus.metz.giswork at googlemail.com
Wed Sep 21 02:52:22 EDT 2011

On Wed, Sep 21, 2011 at 12:51 AM, Pierre Roudier
<pierre.roudier at gmail.com> wrote:
> Markus,
> Sorry for this late reply as I was away from keyboard the last few days,
> I encountered this problem while testing the latest grass_svn  (grass
> 7). I can give it a shot using a stable version if you want,

You can try, but I would be surprised if the result is any different.
Can you make the vector available for testing, or can you reproduce
this with a vector of the sample datasets?

Markus M
> 2011/9/17 Markus Metz <markus.metz.giswork at googlemail.com>:
>> On Fri, Sep 16, 2011 at 6:28 AM, Pierre Roudier
>> <pierre.roudier at gmail.com> wrote:
>>> Dear list,
>>> I got a problem as I'm trying to remove small areas of a vector layer
>>> using v.clean with the rmarea tool: some of these small areas that are
>>> on the boundary of the layer are getting erased rather than being
>>> merged with the closest polygon.
>>> Is that an expected behaviour?
>> No, they should always be merged with a neighbouring area along the
>> shared boundary. Areas are supposed to be erased only if they are
>> isolated, i.e. do not share a boundary with another area. What GRASS
>> version are you using? There was a bug which was fixed 2 years ago.
>> Markus M
> --
> Scientist
> Landcare Research, New Zealand

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