I'm sorry but the procedure that I proposed does not produce good
results. In fact the ascii file produced by v.strahler has very strange
orders, and also many 0 (that does not have sense in strahler order!). I
think the problem is generated in finding the outlets and/or confluences.
Waiting for the response of the List (please)..
margherita
Jarek Jasiewicz wrote:
Hi
maybe this will help:
http://gis.vsb.cz/GIS_Ostrava/GIS_Ova_2009/sbornik/Lists/Papers/060.pdf
it require another gis program but gives great results!
Jarek
Margherita Di Leo pisze:
Hi Stephen,
I actually am fighting against almost the same problem, so let's do
it together :)
I found that r.strahler.sh works well to delineate streams and
correct topology, (I use a treshold of 1km^2, it works well but don't
ask me why :) ), but (in my little experience) does not work to order
streams, so I must run v.strahler after r.strahler.sh.
I know it's a very small hint but hope this helps.
Best
margherita
I have a low relief area in the costal plain of georgia that I am
trying to produce a topologically correct stream network. There are
many breaks in the flow accumulation grid and I would like to
delineate the streams and "correct" the topology after r.thin and
r.to.vect have been preformed so that I can then use v.strahler to
order the streams. Thanks for any help and I will provide and data
that would be helpful. thanks,
-- Stephen Sefick Let's not spend our time and resources thinking
about things that are so little or so large that all they really do
for us is puff us up and make us feel like gods. We are mammals, and
have not exhausted the annoying little problems of being mammals. -K.
Mullis
--
Eng. Margherita Di Leo
Ph.D. Student
Methods and Technologies for Environmental Monitoring
Department of Environmental Engineering and Physics (DIFA)
University of Basilicata
Campus Macchia Romana
85100 - Potenza
Italy
Office: +39-0971205363
Fax: +39-0971205160
E-mail: dileomargherita AT gmail DOT com
Skype: dileomargherita
URL: http://www.difa.unibas.it/A_Manager_PP.do?azione=visualizzaHomePage&id=106
_______________________________________________
grass-user mailing list
grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user
