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

2012-02-16 Thread Helmut Kudrnovsky
Hi, Jarek: 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') It is popular argument against algorithmic approach. Usually computer algorithms cannot reproduce arbitrary human decisions

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

2012-02-15 Thread Helmut Kudrnovsky
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') an example screenshot of

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

2012-02-15 Thread Helmut Kudrnovsky
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') or may have also a look in the pdf mentioned in http://wisa.lebensministerium.at/article/archive/29373 Helmut - best regards Helmut

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

2012-02-15 Thread Jarek Jasiewicz
On 02/15/2012 04:46 PM, Helmut Kudrnovsky 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

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

2012-02-15 Thread Markus Metz
On Wed, Feb 15, 2012 at 10:46 PM, Helmut Kudrnovsky hel...@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