Hi Rashad I tested with the trunk svn, but apparently it still not worked to me. Are you able to test with my datased?
https://www.yousendit.com/download/UW16RE9zTkxlM1JBSXNUQw Thanks! miltinho 2012/12/27, Mohammed Rashad <mohammedrasha...@gmail.com>: > Hi Milton, > > I think this fix will solve the problem[0]. For elevation data there might > be cases where no path exists ie, only single pixel is the selected path. I > had tested it by myself and it worked. > > Please apply the patch and let me know. > > If any problem comes in compilation or doing r.drain let me know. It will > be great if you can share the test data you are using in case not working > after applying the patch > > [0] http://trac.osgeo.org/grass/attachment/ticket/1840/r.drain.diff > [1] http://trac.osgeo.org/grass/attachment/ticket/1840/drain.c > > > On Thu, Dec 27, 2012 at 2:31 AM, Milton Cezar Ribeiro < > miltinho.astrona...@gmail.com> wrote: > >> Hi Mohamed and Markus >> >> Mohamed, thanks for your reply, I will wait for a solution within GRASS >> :-) >> >> Markus, thanks for your reply,. Sorry but I disagree a tiny bit, >> because is expected that between a source and target I will find a >> solution with the Least Cost path. Do you think that is there any >> situation where a least cost between source and target will not be >> found? Maybe if other software provide the soluction, although is not >> the bestest option, I prefere receive one complete output than a >> broken one. >> >> Happy new year! >> >> miltinho >> >> 2012/12/23, Markus Metz <markus.metz.gisw...@gmail.com>: >> > On Sun, Dec 23, 2012 at 7:07 PM, Milton Cezar Ribeiro >> > <miltinho.astrona...@gmail.com> wrote: >> >> Dear all, >> >> >> >> I am running a least cost path analysis combining r.cost and r.drain. >> >> But on some cases, when the least cost path between source and target >> >> reach the border of my map, r.drain stop on that position, and target >> >> point isn´t reached. >> > >> > This is correct because at the borders, the direction can not be >> > determined, the path could lead out of the current region, you can not >> > tell. >> > >> > Running on other softwares the algorithms the >> >> source and target is connected using edges without problem. >> > >> > If in doubt, I would call it a bug in that other software. >> > >> >> >> >> Any hint are welcome. >> > >> > Try to expand the current region >> > >> > Markus M >> > >> >> >> -- >> Miltinho - m...@rc.unesp.br >> Laboratório de Ecologia Espacial e Conservação - LEEC >> Depto de Ecologia - UNESP - Rio Claro >> Av. 24A, 1515- Bela Vista >> 13506-900 Rio Claro, SP, Brasil >> >> Fone: +55 19 3526-9647 (office) 19 3526-9680 (lab) >> Cel: 19 9853-3220 / 19 9853-5430 >> >> Depto Ecologia http://www.rc.unesp.br/ib/ecologia/ >> >> PG ECO & BIODIV >> http://www.rc.unesp.br/ib/ecologia/posbiodiversidade/index.php >> >> CV >> http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4792988H6&mostrarNroCitacoesISI=true&mostrarNroCitacoesScopus=true >> >> Google citations http://scholar.google.com/citations?user=OWX_2eAAAAAJ >> _______________________________________________ >> grass-user mailing list >> grass-user@lists.osgeo.org >> http://lists.osgeo.org/mailman/listinfo/grass-user >> > > > > -- > Regards, > Rashad > -- Miltinho - m...@rc.unesp.br Laboratório de Ecologia Espacial e Conservação - LEEC Depto de Ecologia - UNESP - Rio Claro Av. 24A, 1515- Bela Vista 13506-900 Rio Claro, SP, Brasil Fone: +55 19 3526-9647 (office) 19 3526-9680 (lab) Cel: 19 9853-3220 / 19 9853-5430 Depto Ecologia http://www.rc.unesp.br/ib/ecologia/ PG ECO & BIODIV http://www.rc.unesp.br/ib/ecologia/posbiodiversidade/index.php CV http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4792988H6&mostrarNroCitacoesISI=true&mostrarNroCitacoesScopus=true Google citations http://scholar.google.com/citations?user=OWX_2eAAAAAJ _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
