[GRASS-dev] Re: [GRASS GIS] #1577: r.stream.extract/r.stream.order - "calculated" mainchannel vs. "real" mainchannel

[Markus Metz]

On Wed, Feb 15, 2012 at 10:46 PM, Helmut Kudrnovsky <hellik at web.de> wrote:
> what does it means? Any reference? Main channel established in real network
> or algorithms of modeling main channel?
>
> the mentionned "real" mainchannel is the part of real Austrian river network
> (i.e. listed in the annual Austrian hydrographical handbook as the river
> 'Isel')

As Jarek said, there is nothing like the one and only "real"
mainchannel because there a different definitions on how to determine
the main channel. You would need to get the definition of "real
mainchannel" out of the Austrian hydrographical handbook, maybe modify
input accumulation for r.stream extract and then use the best matching
method in r.stream.order.

Markus M