[GRASS-user] strahler

GRASS GRASS user
1

dear users,
wich is the best way to classify a stream vector network using the
horton strahler method in grass...???

thank you very much....

Ivan

--
Ti prego di cercare di non inviarmi files .doc, .xls, .ppt, .dwg.
Preferisco formati liberi.
Please try to avoid to send me .doc, .xls, .ppt, .dwg files.
I prefer free formats.
http://it.wikipedia.org/wiki/Formato_aperto
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Ivan Marchesini
Department of Civil and Environmental Engineering
University of Perugia
Via G. Duranti 93/a
06125
Perugia (Italy)
e-mail: marchesini@unipg.it
        ivan.marchesini@gmail.com
tel: +39(0)755853760
fax (university): +39(0)755853756
fax (home): +39(0)5782830887
jabber: geoivan73@jabber.org

2

Well, there’s v.strahler, but I never had much luck with it. I did got nice stahler classification using JGrass (http://www.jgrass.org). I remember that I couldn’ t read GRASS rasters directly (although I should), but I managed to get it working by exporting the raster as an GRASS ASCII, and then in JGrass, importing and performing the hidrologic modeling. The raster layers created by JGRASS were immediately available in GRASS.

Carlos

On 10/3/07, ivan marchesini <marchesini@unipg.it> wrote:

dear users,
wich is the best way to classify a stream vector network using the
horton strahler method in grass…???

thank you very much…

Ivan

–
Ti prego di cercare di non inviarmi files .doc, .xls, .ppt, .dwg.
Preferisco formati liberi.
Please try to avoid to send me .doc, .xls, .ppt, .dwg files.
I prefer free formats.
http://it.wikipedia.org/wiki/Formato_aperto
http://en.wikipedia.org/wiki/Open_format

Ivan Marchesini
Department of Civil and Environmental Engineering
University of Perugia
Via G. Duranti 93/a
06125
Perugia (Italy)
e-mail: marchesini@unipg.it
ivan.marchesini@gmail.com
tel: +39(0)755853760
fax (university): +39(0)755853756
fax (home): +39(0)5782830887
jabber: geoivan73@jabber.org

grassuser mailing list
grassuser@grass.itc.it
http://grass.itc.it/mailman/listinfo/grassuser

–
±----------------------------------------------------------+
Carlos Henrique Grohmann - Guano
Visiting Researcher at Kingston University London - UK
Geologist M.Sc - Doctorate Student at IGc-USP - Brazil
Linux User #89721 - carlos dot grohmann at gmail dot com
±----------------------------------------------------------+

“Good morning, doctors. I have taken the liberty of removing Windows 95 from my hard drive.”
–The winning entry in a “What were HAL’s first words” contest judged by 2001: A SPACE ODYSSEY creator Arthur C. Clarke

Can’t stop the signal.

3

ivan marchesini napisa³(a):

dear users,
wich is the best way to classify a stream vector network using the
horton strahler method in grass...???

thank you very much....

Ivan

AFAIK in grass there is no tool to Strahler Analisis.

I strongly suggest using TAS GIS to strahler stream order. Its free (similar to idrisi) but no open source program. Unfortunatly it runs only on windows (and is extremly slow when running on wine)

It has several method to create strahler analisis from dem (including D8, Dinf, Rho, Rhoinf etc to create specific cachment area).

The comunication between grass and TAS is simple. TAS reads GRASS ASCII raster files (do not forget run unix2dos before), and also can write file to GRASS ASCII raster.

There also is good tutorial on Strahler Analisis.

regards
Jarek

4

On 03/10/07 12:28, ivan marchesini wrote:

dear users,
wich is the best way to classify a stream vector network using the
horton strahler method in grass...???

try v.strahler in the GRASS Add-ons:

http://grass.gdf-hannover.de/wiki/GRASS_AddOns

Moritz

5

True, it is not a final solution. What we do need is a r.strahler command in GRASS.

On 10/3/07, ivan marchesini < marchesini@unipg.it> wrote:

Many thanks to all…
the problems are:
1)I wish to use a free/libre solution…
2)v.strahler only produce a text file containing the number of streams
of a defined order… but not a map with attributes concerning stream
order…
3) I know Jgrass, it is a good solution but today I wasn’t able to run
it… I don’t know why… it start but It remain in a frezed situation
(“loading workspace, please wait…”)

so…
the problem is still not solved…

however, thank you for your help… :slight_smile:

Ivan

Il giorno mer, 03/10/2007 alle 11.52 +0100, Carlos “Guâno” Grohmann ha
scritto:

Well, there’s v.strahler, but I never had much luck with it. I did got
nice stahler classification using JGrass ( http://www.jgrass.org). I
remember that I couldn’ t read GRASS rasters directly (although I
should), but I managed to get it working by exporting the raster as an
GRASS ASCII, and then in JGrass, importing and performing the
hidrologic modeling. The raster layers created by JGRASS were
immediately available in GRASS.

Carlos

On 10/3/07, ivan marchesini <marchesini@unipg.it> wrote:
dear users,
wich is the best way to classify a stream vector network using
the
horton strahler method in grass…???

thank you very much…

Ivan

–
Ti prego di cercare di non inviarmi
files .doc, .xls, .ppt, .dwg.
Preferisco formati liberi.
Please try to avoid to send me .doc, .xls, .ppt, .dwg files.
I prefer free formats.
http://it.wikipedia.org/wiki/Formato_aperto
http://en.wikipedia.org/wiki/Open_format

Ivan Marchesini
Department of Civil and Environmental Engineering
University of Perugia
Via G. Duranti 93/a
06125
Perugia (Italy)
e-mail: marchesini@unipg.it
ivan.marchesini@gmail.com
tel: +39(0)755853760
fax (university): +39(0)755853756
fax (home): +39(0)5782830887
jabber: geoivan73@jabber.org

grassuser mailing list
grassuser@grass.itc.it
http://grass.itc.it/mailman/listinfo/grassuser

–
±----------------------------------------------------------+
Carlos Henrique Grohmann - Guano
Visiting Researcher at Kingston University London - UK
Geologist M.Sc - Doctorate Student at IGc-USP - Brazil
Linux User #89721 - carlos dot grohmann at gmail dot com
±----------------------------------------------------------+

“Good morning, doctors. I have taken the liberty of removing Windows
95 from my hard drive.”
–The winning entry in a “What were HAL’s first words” contest judged
by 2001: A SPACE ODYSSEY creator Arthur C. Clarke

Can’t stop the signal.

grassuser mailing list
grassuser@grass.itc.it
http://grass.itc.it/mailman/listinfo/grassuser
–
Ti prego di cercare di non inviarmi files .doc, .xls, .ppt, .dwg.
Preferisco formati liberi.
Please try to avoid to send me .doc, .xls, .ppt, .dwg files.
I prefer free formats.
http://it.wikipedia.org/wiki/Formato_aperto
http://en.wikipedia.org/wiki/Open_format

Ivan Marchesini
Department of Civil and Environmental Engineering
University of Perugia
Via G. Duranti 93/a
06125
Perugia (Italy)
e-mail: marchesini@unipg.it
ivan.marchesini@gmail.com
tel: +39(0)755853760
fax (university): +39(0)755853756
fax (home): +39(0)5782830887
jabber: geoivan73@jabber.org

–
±----------------------------------------------------------+
Carlos Henrique Grohmann - Guano
Visiting Researcher at Kingston University London - UK
Geologist M.Sc - Doctorate Student at IGc-USP - Brazil
Linux User #89721 - carlos dot grohmann at gmail dot com
±----------------------------------------------------------+

“Good morning, doctors. I have taken the liberty of removing Windows 95 from my hard drive.”
–The winning entry in a “What were HAL’s first words” contest judged by 2001: A SPACE ODYSSEY creator Arthur C. Clarke

Can’t stop the signal.

6

Many thanks to all...
the problems are:
1)I wish to use a free/libre solution...
2)v.strahler only produce a text file containing the number of streams
of a defined order... but not a map with attributes concerning stream
order...
3) I know Jgrass, it is a good solution but today I wasn't able to run
it... I don't know why... it start but It remain in a frezed situation
("loading workspace, please wait...")

so..
the problem is still not solved...

however, thank you for your help... :slight_smile:

Ivan

Il giorno mer, 03/10/2007 alle 11.52 +0100, Carlos "Guâno" Grohmann ha
scritto:

Well, there's v.strahler, but I never had much luck with it. I did got
nice stahler classification using JGrass (http://www.jgrass.org). I
remember that I couldn' t read GRASS rasters directly (although I
should), but I managed to get it working by exporting the raster as an
GRASS ASCII, and then in JGrass, importing and performing the
hidrologic modeling. The raster layers created by JGRASS were
immediately available in GRASS.

Carlos

On 10/3/07, ivan marchesini <marchesini@unipg.it> wrote:
        dear users,
        wich is the best way to classify a stream vector network using
        the
        horton strahler method in grass...???
        
        thank you very much....
        
        Ivan
        
        --
        Ti prego di cercare di non inviarmi
        files .doc, .xls, .ppt, .dwg.
        Preferisco formati liberi.
        Please try to avoid to send me .doc, .xls, .ppt, .dwg files.
        I prefer free formats.
        http://it.wikipedia.org/wiki/Formato_aperto
        http://en.wikipedia.org/wiki/Open_format
        
        Ivan Marchesini
        Department of Civil and Environmental Engineering
        University of Perugia
        Via G. Duranti 93/a
        06125
        Perugia (Italy)
        e-mail: marchesini@unipg.it
                ivan.marchesini@gmail.com
        tel: +39(0)755853760
        fax (university): +39(0)755853756
        fax (home): +39(0)5782830887
        jabber: geoivan73@jabber.org
        
        _______________________________________________
        grassuser mailing list
        grassuser@grass.itc.it
        http://grass.itc.it/mailman/listinfo/grassuser

--
+-----------------------------------------------------------+
              Carlos Henrique Grohmann - Guano
  Visiting Researcher at Kingston University London - UK
  Geologist M.Sc - Doctorate Student at IGc-USP - Brazil
Linux User #89721 - carlos dot grohmann at gmail dot com
+-----------------------------------------------------------+
_________________
"Good morning, doctors. I have taken the liberty of removing Windows
95 from my hard drive."
--The winning entry in a "What were HAL's first words" contest judged
by 2001: A SPACE ODYSSEY creator Arthur C. Clarke

Can't stop the signal.
_______________________________________________
grassuser mailing list
grassuser@grass.itc.it
http://grass.itc.it/mailman/listinfo/grassuser

--
Ti prego di cercare di non inviarmi files .doc, .xls, .ppt, .dwg.
Preferisco formati liberi.
Please try to avoid to send me .doc, .xls, .ppt, .dwg files.
I prefer free formats.
http://it.wikipedia.org/wiki/Formato_aperto
http://en.wikipedia.org/wiki/Open_format

Ivan Marchesini
Department of Civil and Environmental Engineering
University of Perugia
Via G. Duranti 93/a
06125
Perugia (Italy)
e-mail: marchesini@unipg.it
        ivan.marchesini@gmail.com
tel: +39(0)755853760
fax (university): +39(0)755853756
fax (home): +39(0)5782830887
jabber: geoivan73@jabber.org

7

Carlos "Guâno" Grohmann wrote:

Well, there's v.strahler, but I never had much luck with it. I did got nice stahler classification using JGrass (http://www.jgrass.org). I remember that I couldn' t read GRASS rasters directly (although I should),

it seems JGrass use grass 5.x data model (see spearfish datased attached to JGarass instalation...

but I managed to get it working by exporting the raster as an GRASS ASCII, and then in JGrass, importing and performing the hidrologic modeling. The raster layers created by JGRASS were immediately available in GRASS.