[GRASS-user] Re: how to only fill small sinks with r.fill.dir

[Bryan Keith]

Hmmm, I'm not following all your steps, but I don't want to manually
identify valid sinks vs. invalid sinks.  I have quite a lot of
surfaces to process, and I'm happy to fill all sinks except those
deeper than 10m.

On Tue, Apr 26, 2011 at 10:04, Saber <razmjooeis at faunalia.co.uk> wrote:
> Here is a (not a very quick) solution I can think of:
>
> 1- Create an inverse mask
> 2- convert the mask to vector (r.to.vect)
> 3- clean the vector file to get rid of the areas not required (v.clean)
> 4- convert the vector back to raster (v.to.rast)
> 5- Use the new raster as a mask for filling holes (probably you need step
> 4.5 to slightly buffer the raster)
>
> Hope that helps
>
>
>> Any ideas on this?
>>
>> Bryan
>>
>> On Mon, Apr 18, 2011 at 14:49, Bryan Keith <bkeith at itascadenver.com>
>> wrote:
>>> Hello,
>>>
>>> Is there a way to only fill sinks in a DEM if they are smaller than a
>>> certain tolerance?  I have a couple areas of internal drainage that
>>> really are correct (and quite large), and I have a quite few small
>>> sinks that are incorrect and artifacts of the interpolation.  Any
>>> ideas how to this?  r.fill.dir attempt to fill all the sinks.
>>>
>>> I'm trying to improve the results from r.flow  Too many tracks end in
>>> small holes where I'd like them to continue downstream.  Thanks.
>>>
>>> Bryan
>>>
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>
>
>