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

GRASS GRASS user
1

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. Running on other softwares the algorithms the
source and target is connected using edges without problem.

Any hint are welcome.

Merry Xmas

--
Miltinho - mcr@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

2

Hi Milton,

I think there is a bug in r.drain direction map calculation. see this thread[0]

It may take a day or two to get fixed. I will send you a patch as I cant commit :wink:

[0] http://lists.osgeo.org/pipermail/grass-user/2012-December/066546.html

···

On Sun, Dec 23, 2012 at 11:37 PM, Milton Cezar Ribeiro <miltinho.astronauta@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. Running on other softwares the algorithms the
source and target is connected using edges without problem.

Any hint are welcome.

Merry Xmas

–
Miltinho - mcr@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

3

On Sun, Dec 23, 2012 at 7:07 PM, Milton Cezar Ribeiro
<miltinho.astronauta@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

4

Hi Mohamed and Markus

Mohamed, thanks for your reply, I will wait for a solution within GRASS :slight_smile:

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@gmail.com>:

On Sun, Dec 23, 2012 at 7:07 PM, Milton Cezar Ribeiro
<miltinho.astronauta@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@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

5

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@gmail.com> wrote:

Hi Mohamed and Markus

Mohamed, thanks for your reply, I will wait for a solution within GRASS :slight_smile:

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@gmail.com>:

On Sun, Dec 23, 2012 at 7:07 PM, Milton Cezar Ribeiro
<miltinho.astronauta@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@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

6

On Wed, Dec 26, 2012 at 10:01 PM, Milton Cezar Ribeiro
<miltinho.astronauta@gmail.com> wrote:

Hi Mohamed and Markus

Mohamed, thanks for your reply, I will wait for a solution within GRASS :slight_smile:

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.

Ah, you are right, if the input is output from r.cost, the cost
directions should be used. Depending on the input data and the region
extents, the least cost path found may not be the real least cost
path, but there should be one solution.

There are situations where there is no connection between source and
target if source and target are separated by NULL cells and no NULL
cost is specified to r.cost.

Markus M

Happy new year!

miltinho

2012/12/23, Markus Metz <markus.metz.giswork@gmail.com>:

On Sun, Dec 23, 2012 at 7:07 PM, Milton Cezar Ribeiro
<miltinho.astronauta@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@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

7

On Wed, Dec 26, 2012 at 10:01 PM, Milton Cezar Ribeiro
<miltinho.astronauta@gmail.com> wrote:

Hi Mohamed and Markus

Mohamed, thanks for your reply, I will wait for a solution within GRASS :slight_smile:

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.

r.drain works for me as expected when the input comes from r.cost,
i.e. movement directions are supplied. In this case the path does not
stop at a border. If the input is a DEM and directions are not
supplied, r.drain stops at borders, as it should do, because drainage
the direction can not be determined. r.drain, as the name implies,
traces a drainage path by following the steepest slope. It is not a
least cost path search module, for that you need to use r.cost +
r.drain.

Markus M

Happy new year!

miltinho

2012/12/23, Markus Metz <markus.metz.giswork@gmail.com>:

On Sun, Dec 23, 2012 at 7:07 PM, Milton Cezar Ribeiro
<miltinho.astronauta@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@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

8

Hi Markus

You are right. Thanks for your comments. In fact I don´t thougth on
null cell between Source and Target, and agree that extent influences
one archive or not a real least cost path solution.

Cheers

miltinho

2012/12/27, Markus Metz <markus.metz.giswork@gmail.com>:

On Wed, Dec 26, 2012 at 10:01 PM, Milton Cezar Ribeiro
<miltinho.astronauta@gmail.com> wrote:

Hi Mohamed and Markus

Mohamed, thanks for your reply, I will wait for a solution within GRASS
:slight_smile:

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.

Ah, you are right, if the input is output from r.cost, the cost
directions should be used. Depending on the input data and the region
extents, the least cost path found may not be the real least cost
path, but there should be one solution.

There are situations where there is no connection between source and
target if source and target are separated by NULL cells and no NULL
cost is specified to r.cost.

Markus M

Happy new year!

miltinho

2012/12/23, Markus Metz <markus.metz.giswork@gmail.com>:

On Sun, Dec 23, 2012 at 7:07 PM, Milton Cezar Ribeiro
<miltinho.astronauta@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@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@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

9

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 <mohammedrashadkm@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@gmail.com> wrote:

Hi Mohamed and Markus

Mohamed, thanks for your reply, I will wait for a solution within GRASS
:slight_smile:

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@gmail.com>:
> On Sun, Dec 23, 2012 at 7:07 PM, Milton Cezar Ribeiro
> <miltinho.astronauta@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@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 - mcr@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

10

On Sun, Dec 30, 2012 at 8:59 PM, Milton Cezar Ribeiro
<miltinho.astronauta@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@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@gmail.com> wrote:

Hi Mohamed and Markus

Mohamed, thanks for your reply, I will wait for a solution within GRASS
:slight_smile:

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@gmail.com>:
> On Sun, Dec 23, 2012 at 7:07 PM, Milton Cezar Ribeiro
> <miltinho.astronauta@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@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 - mcr@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

11

Hi Markus

I am using this commands.

r.cost -k input=friction_landuse_roads output=cost_map
start_points=map_source_pt stop_points=map_target_pt --o
r.drain input=cost_map output=drain_map vector_points=map_target_pt --o

I have not a direction map, and as for other source-target-friction
maps everything works fine without direction map I thougth that this
should work for all.

If you have the chance, please run the command and take a look that
the drain line finish on right border.

best wishes

miltinho

2012/12/30, Markus Metz <markus.metz.giswork@gmail.com>:

On Sun, Dec 30, 2012 at 8:59 PM, Milton Cezar Ribeiro
<miltinho.astronauta@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@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@gmail.com> wrote:

Hi Mohamed and Markus

Mohamed, thanks for your reply, I will wait for a solution within GRASS
:slight_smile:

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@gmail.com>:
> On Sun, Dec 23, 2012 at 7:07 PM, Milton Cezar Ribeiro
> <miltinho.astronauta@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@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 - mcr@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@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

12

On Sun, Dec 30, 2012 at 11:44 PM, Milton Cezar Ribeiro
<miltinho.astronauta@gmail.com> wrote:

Hi Markus

I am using this commands.

r.cost -k input=friction_landuse_roads output=cost_map
start_points=map_source_pt stop_points=map_target_pt --o
r.drain input=cost_map output=drain_map vector_points=map_target_pt --o

r.drain in GRASS 6.4 does not work with cost surfaces generated with
the Knight's Move (r.cost -k). Actually, r.drain does not work at all
with cost surfaces in GRASS 6.4. You need the direction map together
with the cost surface, and this is only available in 6.5 and 7.

I have not a direction map, and as for other source-target-friction
maps everything works fine without direction map I thougth that this
should work for all.

I doubt that it works fine if you do not use the direction map
generated by r.cost, because r.drain modifies the input surface if no
direction map is given, but for a cumulative cost surface these
modifications introduce errors.

If you have the chance, please run the command and take a look that
the drain line finish on right border.

I see. The output is correct with regard to the input cost surface
only if a direction map is used as indir input for r.drain.

I am going to backport r.cost/r.walk/r.drain from 6.5 to 6.4.

Happy new year,

Markus M

best wishes

miltinho

2012/12/30, Markus Metz <markus.metz.giswork@gmail.com>:

On Sun, Dec 30, 2012 at 8:59 PM, Milton Cezar Ribeiro
<miltinho.astronauta@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@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@gmail.com> wrote:

Hi Mohamed and Markus

Mohamed, thanks for your reply, I will wait for a solution within GRASS
:slight_smile:

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@gmail.com>:
> On Sun, Dec 23, 2012 at 7:07 PM, Milton Cezar Ribeiro
> <miltinho.astronauta@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@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 - mcr@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@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

13

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@gmail.com>:

On Sun, Dec 30, 2012 at 8:59 PM, Milton Cezar Ribeiro
<miltinho.astronauta@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@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@gmail.com> wrote:

Hi Mohamed and Markus

Mohamed, thanks for your reply, I will wait for a solution within GRASS
:slight_smile:

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@gmail.com>:
> On Sun, Dec 23, 2012 at 7:07 PM, Milton Cezar Ribeiro
> <miltinho.astronauta@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@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 - mcr@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@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

14

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@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@gmail.com>:

On Sun, Dec 30, 2012 at 8:59 PM, Milton Cezar Ribeiro
<miltinho.astronauta@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@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@gmail.com> wrote:

Hi Mohamed and Markus

Mohamed, thanks for your reply, I will wait for a solution within
GRASS
:slight_smile:

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@gmail.com>:
> On Sun, Dec 23, 2012 at 7:07 PM, Milton Cezar Ribeiro
> <miltinho.astronauta@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@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 - mcr@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@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@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

15

On Mon, Dec 31, 2012 at 3:05 PM, Milton Cezar Ribeiro
<miltinho.astronauta@gmail.com> wrote:

Hi Markus

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

See here:
http://trac.osgeo.org/grass/wiki/Release/6.4.3RC2-News
--> SVN Checkout latest 6.4 release branch (including unreleased bugfixes):

Best
MarkusN

16

Hi all,

thanks again for the help with this.
I tried several versions of 6.4X (6.42 weekly snapshot, 6.43.. ) and
6.5 but in none of them, when I try to see the parameters for create
output direction on r.cost man page I can't see how can I generate
direction for input on r.drain.

Including the suggestion of M.Neterler
svn checkout https://svn.osgeo.org/grass/grass/branches/develbranch_6
grass6_devel

Sorry to do this so trouble, but maybe I am not finding where can I
get an updated version of r.cost, r.drain and r.walk.

Happy 2013!

miltinho

2012/12/31, Markus Neteler <neteler@osgeo.org>:

On Mon, Dec 31, 2012 at 3:05 PM, Milton Cezar Ribeiro
<miltinho.astronauta@gmail.com> wrote:

Hi Markus

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

See here:
http://trac.osgeo.org/grass/wiki/Release/6.4.3RC2-News
--> SVN Checkout latest 6.4 release branch (including unreleased bugfixes):

Best
MarkusN

--
Miltinho - mcr@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

17

On Mon, Dec 31, 2012 at 3:52 PM, Milton Cezar Ribeiro
<miltinho.astronauta@gmail.com> wrote:

Hi all,

thanks again for the help with this.
I tried several versions of 6.4X (6.42 weekly snapshot, 6.43.. ) and
6.5 but in none of them, when I try to see the parameters for create
output direction on r.cost man page I can't see how can I generate
direction for input on r.drain.

For r.cost and r.walk, the option to write directions to a raster map
is outdir, see

http://grass.osgeo.org/grass65/manuals/r.cost.html
http://grass.osgeo.org/grass65/manuals/r.walk.html

For r.drain, the option to use directions as input is indir, see

http://grass.osgeo.org/grass65/manuals/r.drain.html

Including the suggestion of M.Neterler
svn checkout https://svn.osgeo.org/grass/grass/branches/develbranch_6
grass6_devel

Sorry to do this so trouble, but maybe I am not finding where can I
get an updated version of r.cost, r.drain and r.walk.

Within the root directory of the source tree
svn up

Markus M

Happy 2013!

miltinho

2012/12/31, Markus Neteler <neteler@osgeo.org>:

On Mon, Dec 31, 2012 at 3:05 PM, Milton Cezar Ribeiro
<miltinho.astronauta@gmail.com> wrote:

Hi Markus

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

See here:
http://trac.osgeo.org/grass/wiki/Release/6.4.3RC2-News
--> SVN Checkout latest 6.4 release branch (including unreleased bugfixes):

Best
MarkusN

--
Miltinho - mcr@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

18

On Mon, Dec 31, 2012 at 4:41 PM, Markus Metz
<markus.metz.giswork@gmail.com> wrote:

see

http://grass.osgeo.org/grass65/manuals/r.cost.html
http://grass.osgeo.org/grass65/manuals/r.walk.html

For r.drain, the option to use directions as input is indir, see

http://grass.osgeo.org/grass65/manuals/r.drain.html

Just FYI:
I forced the creation of the 6.4 manual an hour ago, so that's
also already updated (usually it happens on Saturdays).

MarkusN

19

Hi there

Everything worked fine.
Congrats for all your great job on GRASS-GIS solution, and again many
thanks for the effert on deal with this in the transition 2012/2013
(yes! 2013 in Australia and other places around world!).

best wishes

miltinho

2012/12/31, Markus Neteler <neteler@osgeo.org>:

On Mon, Dec 31, 2012 at 4:41 PM, Markus Metz
<markus.metz.giswork@gmail.com> wrote:

see

http://grass.osgeo.org/grass65/manuals/r.cost.html
http://grass.osgeo.org/grass65/manuals/r.walk.html

For r.drain, the option to use directions as input is indir, see

http://grass.osgeo.org/grass65/manuals/r.drain.html

Just FYI:
I forced the creation of the 6.4 manual an hour ago, so that's
also already updated (usually it happens on Saturdays).

MarkusN

--
Miltinho - mcr@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