Dear all,
I’m trying to use v.net.distance in grass7, which option seem be corrected respect of teh version of grass65 (alayer, nlayer and consequently costs).
First of all, I noted that the option output is reported two time, but this can be simply corrected removing line 134 of main.c command. If needed I can add in the svn.
Secondarly the program stop itself because if I correctly uderstand, the number of lines not corresponding with the number of nodes.
ERROR: Nodes not available for line 8819
Unfortunately I’m not expert with vector grass libraries so I didn’t understand the problem…
–
I’m using as a test the north carolina dataset and in particular I do the step of the tutorial of Trento university (http://www.ing.unitn.it/~grass/docs/tutorial_64_en/htdocs/esercitazione/network_analysis/index.html) adding also a 4th layer with the nodes. Attached a script to create the dataset (grass70)
Cheers,
Roberto
(attachments)
network_script.sh (5.29 KB)
On Fri, Jun 15, 2012 at 6:12 PM, Roberto Marzocchi
<roberto.marzocchi@gmail.com> wrote:
Dear all,
I'm trying to use v.net.distance in grass7, which option seem be corrected
respect of teh version of grass65 (alayer, nlayer and consequently costs).
First of all, I noted that the option output is reported two time, but this
can be simply corrected removing line 134 of main.c command. If needed I can
add in the svn.
Secondarly the program stop itself because if I correctly uderstand, the
number of lines not corresponding with the number of nodes.
ERROR: Nodes not available for line 8819
v.net.distance should be fixed with r52069.
Unfortunately I'm not expert with vector grass libraries so I didn't
understand the problem..
--
I'm using as a test the north carolina dataset and in particular I do the
step of the tutorial of Trento university
(http://www.ing.unitn.it/~grass/docs/tutorial_64_en/htdocs/esercitazione/network_analysis/index.html) adding
also a 4th layer with the nodes. Attached a script to create the dataset
(grass70)
In the test script, use
v.net.distance input=network_cat4 output=network_cat4_distance
alayer=3 nlayer=4 afcolumn=lungh_a abcolumn=lungh_i flayer=4
from_cats=1-4 tlayer=3 to_type=line to_cats=6-6920
in order to get the shortest paths from the four selected firestations
to the network. The 'from' features are always points, I have updated
the description and manual accordingly.
Markus M
Cheers,
Roberto
_______________________________________________
grass-dev mailing list
grass-dev@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-dev
Hi Markus,
many thannks for your changes. I think now the command is quite O.K… Nevertheless I have encountered a new error:
I have tried with the command that you suggested me (to_type is point and not line) and it works.
v.net.distance input=network_cat4 output=network_cat4_distance alayer=3 nlayer=4 afcolumn=lungh_a abcolumn=lungh_i flayer=4 from_cats=1-4 tlayer=4 to_type=point to_cats=5-6920 --overwrite
after I try to do the opposite, that is from the 6916 nodes of the network (that are point!) to the firestations and it don’t works
v.net.distance input=network_cat4 output=network_cat4_distance alayer=3 nlayer=4 afcolumn=lungh_a abcolumn=lungh_i tlayer=4 to_cats=1-4 flayer=4 to_type=point from_cats=5-6920 --overwrite
Building graph…
Registering arcs…
100%
Flattening the graph…
Graph was built
ERROR: Requested feature id -1 is not reasonable(max features in vector map
<network_cat4@ospedali_grass7>: 15747)
I don’t understand why…
Thanks in advanced,
Roberto
2012/6/16 Markus Metz <markus.metz.giswork@googlemail.com>
On Fri, Jun 15, 2012 at 6:12 PM, Roberto Marzocchi
<roberto.marzocchi@gmail.com> wrote:
Dear all,
I’m trying to use v.net.distance in grass7, which option seem be corrected
respect of teh version of grass65 (alayer, nlayer and consequently costs).
First of all, I noted that the option output is reported two time, but this
can be simply corrected removing line 134 of main.c command. If needed I can
add in the svn.
Secondarly the program stop itself because if I correctly uderstand, the
number of lines not corresponding with the number of nodes.
ERROR: Nodes not available for line 8819
v.net.distance should be fixed with r52069.
Unfortunately I’m not expert with vector grass libraries so I didn’t
understand the problem…
–
I’m using as a test the north carolina dataset and in particular I do the
step of the tutorial of Trento university
(http://www.ing.unitn.it/~grass/docs/tutorial_64_en/htdocs/esercitazione/network_analysis/index.html) adding
also a 4th layer with the nodes. Attached a script to create the dataset
(grass70)
In the test script, use
v.net.distance input=network_cat4 output=network_cat4_distance
alayer=3 nlayer=4 afcolumn=lungh_a abcolumn=lungh_i flayer=4
from_cats=1-4 tlayer=3 to_type=line to_cats=6-6920
in order to get the shortest paths from the four selected firestations
to the network. The ‘from’ features are always points, I have updated
the description and manual accordingly.
Markus M
Cheers,
Roberto
grass-dev mailing list
grass-dev@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-dev
On Mon, Jun 18, 2012 at 3:13 PM, Roberto Marzocchi
<roberto.marzocchi@gmail.com> wrote:
Hi Markus,
many thannks for your changes. I think now the command is quite O.K..
Nevertheless I have encountered a new error:
I have tried with the command that you suggested me (to_type is point and
not line) and it works.
v.net.distance input=network_cat4 output=network_cat4_distance alayer=3
nlayer=4 afcolumn=lungh_a abcolumn=lungh_i flayer=4 from_cats=1-4 tlayer=4
to_type=point to_cats=5-6920 --overwrite
after I try to do the opposite, that is from the 6916 nodes of the network
(that are point!) to the firestations and it don't works
v.net.distance input=network_cat4 output=network_cat4_distance alayer=3
nlayer=4 afcolumn=lungh_a abcolumn=lungh_i tlayer=4 to_cats=1-4 flayer=4
to_type=point from_cats=5-6920 --overwrite
Building graph...
Registering arcs...
100%
Flattening the graph...
Graph was built
ERROR: Requested feature id -1 is not reasonable(max features in vector
map
<network_cat4@ospedali_grass7>: 15747)
I don't understand why...
Some of the 'from' features are not reachable within the network. For
each 'from' feature, the module finds the nearest 'to' feature. That
means that all 'from' features must be connected to the network, but
it is ok if some 'to' features are not connected. This is why you got
this error after you swapped the set of 'from' and 'to' features.
Fixed in r52124. But maybe a warning would be useful if some 'from' or
'to' features are not reachable.
Markus M
Thanks in advanced,
Roberto
2012/6/16 Markus Metz <markus.metz.giswork@googlemail.com>
On Fri, Jun 15, 2012 at 6:12 PM, Roberto Marzocchi
<roberto.marzocchi@gmail.com> wrote:
> Dear all,
>
> I'm trying to use v.net.distance in grass7, which option seem be
> corrected
> respect of teh version of grass65 (alayer, nlayer and consequently
> costs).
>
> First of all, I noted that the option output is reported two time, but
> this
> can be simply corrected removing line 134 of main.c command. If needed I
> can
> add in the svn.
> Secondarly the program stop itself because if I correctly uderstand, the
> number of lines not corresponding with the number of nodes.
>
> ERROR: Nodes not available for line 8819
v.net.distance should be fixed with r52069.
>
> Unfortunately I'm not expert with vector grass libraries so I didn't
> understand the problem..
>
>
> --
>
> I'm using as a test the north carolina dataset and in particular I do
> the
> step of the tutorial of Trento university
>
> (http://www.ing.unitn.it/~grass/docs/tutorial_64_en/htdocs/esercitazione/network_analysis/index.html) adding
> also a 4th layer with the nodes. Attached a script to create the dataset
> (grass70)
In the test script, use
v.net.distance input=network_cat4 output=network_cat4_distance
alayer=3 nlayer=4 afcolumn=lungh_a abcolumn=lungh_i flayer=4
from_cats=1-4 tlayer=3 to_type=line to_cats=6-6920
in order to get the shortest paths from the four selected firestations
to the network. The 'from' features are always points, I have updated
the description and manual accordingly.
Markus M
>
>
> Cheers,
> Roberto
>
>
>
>
> _______________________________________________
> grass-dev mailing list
> grass-dev@lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/grass-dev
2012/6/18 Markus Metz <markus.metz.giswork@googlemail.com>
On Mon, Jun 18, 2012 at 3:13 PM, Roberto Marzocchi
<roberto.marzocchi@gmail.com> wrote:
Hi Markus,
many thannks for your changes. I think now the command is quite O.K…
Nevertheless I have encountered a new error:
I have tried with the command that you suggested me (to_type is point and
not line) and it works.
v.net.distance input=network_cat4 output=network_cat4_distance alayer=3
nlayer=4 afcolumn=lungh_a abcolumn=lungh_i flayer=4 from_cats=1-4 tlayer=4
to_type=point to_cats=5-6920 --overwrite
after I try to do the opposite, that is from the 6916 nodes of the network
(that are point!) to the firestations and it don’t works
v.net.distance input=network_cat4 output=network_cat4_distance alayer=3
nlayer=4 afcolumn=lungh_a abcolumn=lungh_i tlayer=4 to_cats=1-4 flayer=4
to_type=point from_cats=5-6920 --overwrite
Building graph…
Registering arcs…
100%
Flattening the graph…
Graph was built
ERROR: Requested feature id -1 is not reasonable(max features in vector
map
<network_cat4@ospedali_grass7>: 15747)
I don’t understand why…
Some of the ‘from’ features are not reachable within the network. For
each ‘from’ feature, the module finds the nearest ‘to’ feature. That
means that all ‘from’ features must be connected to the network, but
it is ok if some ‘to’ features are not connected. This is why you got
this error after you swapped the set of ‘from’ and ‘to’ features.
Fixed in r52124. But maybe a warning would be useful if some ‘from’ or
‘to’ features are not reachable.
Markus M
Dear Markus,
Now It works also for other points. Obviously the nodes not connected are not considered.
I’m in agree with you, a warning can be very useful!
It is strange also that the points are not connected to the network. In fact I have created the nodes using v.net.
I will check if there is any problem with v.net.
Many thanks and best regards,
Roberto
Thanks in advanced,
Roberto
2012/6/16 Markus Metz <markus.metz.giswork@googlemail.com>
On Fri, Jun 15, 2012 at 6:12 PM, Roberto Marzocchi
<roberto.marzocchi@gmail.com> wrote:
Dear all,
I’m trying to use v.net.distance in grass7, which option seem be
corrected
respect of teh version of grass65 (alayer, nlayer and consequently
costs).
First of all, I noted that the option output is reported two time, but
this
can be simply corrected removing line 134 of main.c command. If needed I
can
add in the svn.
Secondarly the program stop itself because if I correctly uderstand, the
number of lines not corresponding with the number of nodes.
ERROR: Nodes not available for line 8819
v.net.distance should be fixed with r52069.
Unfortunately I’m not expert with vector grass libraries so I didn’t
understand the problem…
–
I’m using as a test the north carolina dataset and in particular I do
the
step of the tutorial of Trento university
(http://www.ing.unitn.it/~grass/docs/tutorial_64_en/htdocs/esercitazione/network_analysis/index.html) adding
also a 4th layer with the nodes. Attached a script to create the dataset
(grass70)
In the test script, use
v.net.distance input=network_cat4 output=network_cat4_distance
alayer=3 nlayer=4 afcolumn=lungh_a abcolumn=lungh_i flayer=4
from_cats=1-4 tlayer=3 to_type=line to_cats=6-6920
in order to get the shortest paths from the four selected firestations
to the network. The ‘from’ features are always points, I have updated
the description and manual accordingly.
Markus M
Cheers,
Roberto
grass-dev mailing list
grass-dev@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-dev
On Tue, Jun 19, 2012 at 12:57 PM, Roberto Marzocchi
<roberto.marzocchi@gmail.com> wrote:
2012/6/18 Markus Metz <markus.metz.giswork@googlemail.com>
On Mon, Jun 18, 2012 at 3:13 PM, Roberto Marzocchi
<roberto.marzocchi@gmail.com> wrote:
> Hi Markus,
>
> many thannks for your changes. I think now the command is quite O.K..
> Nevertheless I have encountered a new error:
> I have tried with the command that you suggested me (to_type is point
> and
> not line) and it works.
>
>
> v.net.distance input=network_cat4 output=network_cat4_distance alayer=3
> nlayer=4 afcolumn=lungh_a abcolumn=lungh_i flayer=4 from_cats=1-4
> tlayer=4
> to_type=point to_cats=5-6920 --overwrite
>
> after I try to do the opposite, that is from the 6916 nodes of the
> network
> (that are point!) to the firestations and it don't works
>
> v.net.distance input=network_cat4 output=network_cat4_distance alayer=3
> nlayer=4 afcolumn=lungh_a abcolumn=lungh_i tlayer=4 to_cats=1-4 flayer=4
> to_type=point from_cats=5-6920 --overwrite
>
>
>
>>> Building graph...
>>> Registering arcs...
>>> 100%
>>> Flattening the graph...
>>> Graph was built
>>> ERROR: Requested feature id -1 is not reasonable(max features in
>>> vector
>>> map
>>> <network_cat4@ospedali_grass7>: 15747)
>
>
> I don't understand why...
Some of the 'from' features are not reachable within the network. For
each 'from' feature, the module finds the nearest 'to' feature. That
means that all 'from' features must be connected to the network, but
it is ok if some 'to' features are not connected. This is why you got
this error after you swapped the set of 'from' and 'to' features.
Fixed in r52124. But maybe a warning would be useful if some 'from' or
'to' features are not reachable.
Markus M
Dear Markus,
Now It works also for other points. Obviously the nodes not connected are
not considered.
I'm in agree with you, a warning can be very useful!
OK, I will add more warnings to the module.
It is strange also that the points are not connected to the network. In fact
I have created the nodes using v.net.
I will check if there is any problem with v.net.
I don't think there are problems with v.net. See attached screenshot
of the south-eastern corner of the network_cat4 vector.
Markus M
Many thanks and best regards,
Roberto
>
> Thanks in advanced,
> Roberto
>
> 2012/6/16 Markus Metz <markus.metz.giswork@googlemail.com>
>>
>> On Fri, Jun 15, 2012 at 6:12 PM, Roberto Marzocchi
>> <roberto.marzocchi@gmail.com> wrote:
>> > Dear all,
>> >
>> > I'm trying to use v.net.distance in grass7, which option seem be
>> > corrected
>> > respect of teh version of grass65 (alayer, nlayer and consequently
>> > costs).
>> >
>> > First of all, I noted that the option output is reported two time,
>> > but
>> > this
>> > can be simply corrected removing line 134 of main.c command. If
>> > needed I
>> > can
>> > add in the svn.
>> > Secondarly the program stop itself because if I correctly uderstand,
>> > the
>> > number of lines not corresponding with the number of nodes.
>> >
>> > ERROR: Nodes not available for line 8819
>>
>> v.net.distance should be fixed with r52069.
>>
>> >
>> > Unfortunately I'm not expert with vector grass libraries so I didn't
>> > understand the problem..
>> >
>> >
>> > --
>> >
>> > I'm using as a test the north carolina dataset and in particular I do
>> > the
>> > step of the tutorial of Trento university
>> >
>> >
>> > (http://www.ing.unitn.it/~grass/docs/tutorial_64_en/htdocs/esercitazione/network_analysis/index.html) adding
>> > also a 4th layer with the nodes. Attached a script to create the
>> > dataset
>> > (grass70)
>>
>> In the test script, use
>>
>> v.net.distance input=network_cat4 output=network_cat4_distance
>> alayer=3 nlayer=4 afcolumn=lungh_a abcolumn=lungh_i flayer=4
>> from_cats=1-4 tlayer=3 to_type=line to_cats=6-6920
>>
>> in order to get the shortest paths from the four selected firestations
>> to the network. The 'from' features are always points, I have updated
>> the description and manual accordingly.
>>
>> Markus M
>>
>> >
>> >
>> > Cheers,
>> > Roberto
>> >
>> >
>> >
>> >
>> > _______________________________________________
>> > grass-dev mailing list
>> > grass-dev@lists.osgeo.org
>> > http://lists.osgeo.org/mailman/listinfo/grass-dev
>
>
(attachments)
