[GRASS-user] r.drain problem when flow reach the border

Mon Dec 31 06:05:14 PST 2012

Hi Markus

Thanks for all your help.
Please, which svn command I need to run to get the daily trunk subversion?

best

miltinho

2012/12/31, Markus Metz <markus.metz.giswork at gmail.com>:
> Markus Metz wrote:
>>
>> I am going to backport r.cost/r.walk/r.drain from 6.5 to 6.4.
>
> Done in r54470-1.
>
>>
>> Happy new year,
>>
>> Markus M
>>
>>>
>>> best wishes
>>>
>>> miltinho
>>>
>>>
>>> 2012/12/30, Markus Metz <markus.metz.giswork at gmail.com>:
>>>> On Sun, Dec 30, 2012 at 8:59 PM, Milton Cezar Ribeiro
>>>> <miltinho.astronauta at gmail.com> wrote:
>>>>> 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
>>>>
>>>> What are the commands you used? I found
>>>> r.drain input=custo_aux_cost output=custo_aux_cost_drain
>>>> vector_points=map_target_pt
>>>>
>>>> You need to also provide a direction map with the indir option of
>>>> r.drain.
>>>>
>>>> Markus M
>>>>
>>>>>
>>>>> Thanks!
>>>>>
>>>>> miltinho
>>>>>
>>>>> 2012/12/27, Mohammed Rashad <mohammedrashadkm at 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.astronauta at 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.giswork at gmail.com>:
>>>>>>> > On Sun, Dec 23, 2012 at 7:07 PM, Milton Cezar Ribeiro
>>>>>>> > <miltinho.astronauta at 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 - mcr at 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 at lists.osgeo.org
>>>>>>> http://lists.osgeo.org/mailman/listinfo/grass-user
>>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Regards,
>>>>>>    Rashad
>>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Miltinho - mcr at 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
>>>>
>>>
>>>
>>> --
>>> Miltinho - mcr at 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
>

-- 
Miltinho - mcr at 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