[GRASS-user] announcement of strahler stream order analysis

[Jarek Jasiewicz]

stephen sefick pisze:
> First, if I haven't said this yet, wonderful job.  Is there a way to
> extract things like total lengths of streams from the raster. 
In the feature module is only introducion to  full Hortonian analysis
>  Like
> length of stream order 1, 2, etc., so that percentage of occurrence
> could be calculated- length order1/length total?  On an unrelated note
> I added this package to the raster set in the source and recompiled on
> Mac.  I have lost the ability to use the python GUI.  I am having a
> hard time figuring out how to do this.  Should I reinstall the Binary
> version, add r.streams to the add on packages, or is there a simpler
> way to add a flag in the ./configure argument?
>   
I don't know nothhing about wxGUI except that it exist so I cannot help.
> Thanks,
>
> Stephen Sefick
>
> On Tue, Jul 28, 2009 at 11:14 AM, Milton Cezar
> Ribeiro<miltinho.astronauta at gmail.com> wrote:
>   
>> Thanks Carlos!!
>>
>> milton
>>
>> 2009/7/28 Carlos Grohmann <carlos.grohmann at gmail.com>
>>     
>>> Just tested in a LatLong region. works fine.
>>>
>>> Carlos
>>>
>>>
>>>
>>>
>>>
>>> 2009/7/28 Jarek Jasiewicz <jarekj at amu.edu.pl>:
>>>       
>>>> try, I don't know I haven't  LL location to test it
>>>> but it shoud work
>>>> program do not use any inforamtuon about units and units conversion
>>>>
>>>> Jarek
>>>>
>>>> Milton Cezar Ribeiro pisze:
>>>>         
>>>>> Hi Jarek
>>>>>
>>>>> Can use this on a LatLong mapset where my unit is not meters?
>>>>> Thanks for the effort!
>>>>>
>>>>> milton
>>>>>
>>>>> 2009/7/26 Jarek Jasiewicz <jarekj at amu.edu.pl
>>>>> <mailto:jarekj at amu.edu.pl>>
>>>>>
>>>>>    Hi list!
>>>>>
>>>>>    I just finish first version of new grass module r.stream. Module
>>>>>    is regular Grass module, written in C an has no addational
>>>>>    dependencies. It was compiled with GRASS65 devel  downloaded in
>>>>>    last  two week. Source code you can find here:
>>>>>
>>>>>    http://heretic.livenet.pl/heretic/r.stream.tar.gz
>>>>>
>>>>>    Module compiles and seems to work. Analysis was tested only on one
>>>>>    dataset.
>>>>>
>>>>>    To compile it copy r.streams directory to your grassXX../raster/
>>>>>     cd r.stream run make and make install
>>>>>
>>>>>    What module calculate:
>>>>>    - strahler stream order
>>>>>    - shreeve stream magnitude
>>>>>    - class of topological elements of drainage networks
>>>>>
>>>>>    Module use r.watershed outputs: SDF flow direction and SDF stream
>>>>>    network.
>>>>>
>>>>>
>>>>>    Analysis of r.stream shall be run on same regions setings as
>>>>>    r.watershed. If no, run g.region rast=your_dir_file first. For now
>>>>>    module do not check if region and rasters are identical. It is
>>>>>    planned to add in nearest feature. It also do not check if dirs
>>>>>    and streams are SDF result. Threre are no addational description.
>>>>>    It will be added after testing.
>>>>>
>>>>>    It works only on cells data. Floating points data are not allowed
>>>>>    (and have no sense).
>>>>>
>>>>>    Module is quite fast. 3000 x3000 cells all three analysis runs no
>>>>>    more than 30 s. on AMD 3800 2GB, Ubuntu 8.04
>>>>>
>>>>>    Module is part of comprehensive project which will add full Horton
>>>>>    analysis and some addational terrrains analysis to Grass. More
>>>>>    details in the feature. Any cooperation is welcome. The next
>>>>>    module I plan is directional vectorisation of stream network.
>>>>>
>>>>>    For now module is available only form web address pointed below.
>>>>>    After testing and removing critical errors it will be added to
>>>>>    grass add-ons (or maybe to main branch?).
>>>>>
>>>>>    Any coments, improvements and critics is very welcome.
>>>>>
>>>>>    More advanced Grass developers: Please check my code. Its funny,
>>>>>    but I don't know C.
>>>>>    General code is based on GRASS r.topindex module (by Keith Beven
>>>>>    and Huidae Cho, strongly modified)
>>>>>    Strahler stream order algorithm from Saga GIS (by Victor Olaya,
>>>>>    modified)
>>>>>    Shreeve stream magnitude and class of topological network are my
>>>>>    own ideas
>>>>>
>>>>>    Test and enjoy.
>>>>>
>>>>>    Jarek Jasiewicz
>>>>>    Adam Mickiewicz University, Poznan
>>>>>    Geoecology and Geoinformation Institute
>>>>>    _______________________________________________
>>>>>    grass-user mailing list
>>>>>    grass-user at lists.osgeo.org <mailto:grass-user at lists.osgeo.org>
>>>>>    http://lists.osgeo.org/mailman/listinfo/grass-user
>>>>>
>>>>>
>>>>>           
>>>> _______________________________________________
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>>>>         
>>>
>>> --
>>> Carlos Henrique Grohmann - Geologist D.Sc.
>>> a.k.a. Guano - Linux User #89721
>>> ResearcherID: A-9030-2008
>>>
>>> http://digitalelevation.blogspot.com
>>>
>>> http://www.igc.usp.br/pessoais/guano
>>> _________________
>>> Can’t stop the signal.
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>>>       
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