[GRASS-user] r.basins.fill usage

[MS]

The man page seems to imply that internal divided need digitized?

Much thanks,

Mark

On Oct 15, 2009, at 9:27 AM, Achim Kisseler <ak7 at jupiter.uni- 
freiburg.de> wrote:

> I'm not sure if I understood you right:
>
> the border of a watershed is unique, if you see the basin starting  
> from
> outlet of a river into the ocean.
>
> But there are unlimited subbasins (up to the resolution of the  
> raster)!
>
> So you have to define a characteristic for the watersheds, eg. a basin
> size from the threshold of r.watershed.
>
> Greets,
> Achim
>
> M S schrieb:
>> Upon first glance, r.basins.fill seems like a great tool to generate
>> subbasins within a watershed.  Although I must not be understanding
>> something obvious and essential.
>>
>> If one has to digitize in the internal ridges in a given watershed,
>> why run the ridge input through the module if one has essentially  
>> just
>> delineated the subbasins ridges?
>>
>> Is there an advantage to using a smaller threshold on r.watershed to
>> get smaller basin delineations (ceasing when thin strip basins get
>> introduced)?
>>
>> Thanks for any feedback,
>> Mark
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