Dear GRASS developers and users,
I am using GRASS GIS for some hydrological applications. For some questions like flood prediction it is useful to estimate the travel time of surface water in a basin to the outlet. Therefor I've developed a raster program "r.traveltime" which calculates the travel time for each cell in a basin from outputs of r.watershed and r.fill.dir. There is much literature about this procedure available but there's a lag of available software (GRASS and even ArcGIS do not come with this function). The personal need an the lag of available programs were the reason for me to develop a new program for GRASS GIS. I am not a programming expert, so the program is very simple and far away from being perfect.
I submitted this tool to the GRASS Wiki addon page.
In November I have already posted r.traveltime to the GRASS weblist mailing list. Recently I've found some bugs in the program. I hope it works correctly now.
r.traveltime is available here:
http://home.arcor.de/jesbergwetter/main_sw.html
Best regards
Kristian Förster
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Thank you very much for your work Kristian...
really...
Cheers
Ivan
Il giorno dom, 30/12/2007 alle 09.44 +0100, jesbergwetter@arcor.de ha
scritto:
Dear GRASS developers and users,
I am using GRASS GIS for some hydrological applications. For some questions like flood prediction it is useful to estimate the travel time of surface water in a basin to the outlet. Therefor I've developed a raster program "r.traveltime" which calculates the travel time for each cell in a basin from outputs of r.watershed and r.fill.dir. There is much literature about this procedure available but there's a lag of available software (GRASS and even ArcGIS do not come with this function). The personal need an the lag of available programs were the reason for me to develop a new program for GRASS GIS. I am not a programming expert, so the program is very simple and far away from being perfect.
I submitted this tool to the GRASS Wiki addon page.
In November I have already posted r.traveltime to the GRASS weblist mailing list. Recently I've found some bugs in the program. I hope it works correctly now.
r.traveltime is available here:
http://home.arcor.de/jesbergwetter/main_sw.html
Best regards
Kristian Förster
Viel oder wenig? Schnell oder langsam? Unbegrenzt surfen + telefonieren
ohne Zeit- und Volumenbegrenzung? DAS TOP ANGEBOT FÜR ALLE NEUEINSTEIGER
Jetzt bei Arcor: günstig und schnell mit DSL - das All-Inclusive-Paket
für clevere Doppel-Sparer, nur 29,95 Euro inkl. DSL- und ISDN-Grundgebühr!
http://www.arcor.de/rd/emf-dsl-2
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Ivan Marchesini
Department of Civil and Environmental Engineering
University of Perugia
Via G. Duranti 93/a
06125
Perugia (Italy)
Socio fondatore GFOSS "Geospatial Free and Open Source Software" http://www.gfoss.it
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
Hi Kristian,
On Sun, Dec 30, 2007 at 9:44 AM, <jesbergwetter@arcor.de> wrote:
Dear GRASS developers and users,
I am using GRASS GIS for some hydrological applications. For some questions like flood prediction it is useful to estimate the travel time of surface water in a basin to the outlet. Therefor I've developed a raster program "r.traveltime" which calculates the travel time for each cell in a basin from outputs of r.watershed and r.fill.dir. There is much literature about this procedure available but there's a lag of available software (GRASS and even ArcGIS do not come with this function). The personal need an the lag of available programs were the reason for me to develop a new program for GRASS GIS. I am not a programming expert, so the program is very simple and far away from being perfect.
I submitted this tool to the GRASS Wiki addon page.
In November I have already posted r.traveltime to the GRASS weblist mailing list. Recently I've found some bugs in the program. I hope it works correctly now.
r.traveltime is available here:
http://home.arcor.de/jesbergwetter/main_sw.html
Best regards
Kristian Förster
Using the version in GRASS 6 Addons, I have made an attempt to port it to
GRASS GIS 7 in
http://trac.osgeo.org/grass/changeset/56190
I don't see any reasonable result with the provided example, in case
you are still listening here, would you be willing to check my
changes? (anybody else welcome too!)
thanks
Markus