[GRASS-user] stream network extraction

[Jarosław Jasiewicz]

Markus Metz pisze:
> Hi all,
>
> in grass-addons is a new module for clean stream network extraction 
> from flow accumulation. It can extract streams from accumulation maps 
> generated with any method (D8, FD8, D-Inf, DEMON, etc) and any 
> software, granted that exactly the same elevation map is provided that 
> was used to calculate flow accumulation. In case of r.terraflow, that 
> would be the flooded (filled) output elevation map, not the elevation 
> map used as input for r.terraflow. For e.g. TAS flow accumulation as 
> input, it must be the elevation map used within TAS to calculate flow 
> accumulation.
>
> r.stream.extract output is available as raster and vector with unique 
> stream IDs. The vector is a complete network with stream segments and 
> points for stream heads, confluences and outlets. The raster output 
> can be used as input for the r.stream.* modules of Jarek, also in 
> grass-addons.
>
> Regards,
>
> Markus M
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Hi Markus, Hi all.

rest of r.stream* modules including new r.stream.stats for Hortonian 
statistics are now available by grass addons page and by grass add-ons 
svn repository. I actually move tutorial on r.stream* to grass wiki page.

Jarek