[GRASS-user] error with v.net.salesman

[José María Michia]

2008/12/31 Dylan Beaudette <dylan.beaudette en gmail.com>:
> On Wed, Dec 31, 2008 at 5:20 AM, Markus Neteler <neteler en osgeo.org> wrote:
>> Hi José,
>>
>> On Wed, Dec 31, 2008 at 8:39 AM, José María Michia
>> <jose.maria.michia en gmail.com> wrote:
>>> Hello everyone. I'm trying v.net.salesman module. I followed the
>>> instructions in the manual page. All tests are good, except one case,
>>> which returns the following error:
>>>
>>>> v.net.salesman myroads_net ccats=1-237 out=mysalesman2
>>> Number of cities: [237]
>>> Building graph...
>>> Registering arcs...
>>>  100%
>>> Flattening the graph...
>>> Graph was built
>>> ERROR: Destination node [604] is unreachable from node [1045]
>>>
>>> The range 1-237 refers to all nodes in the network.
>>>
>>> I can not find a way of relate [604] and [1045] with categories.
>>
>> Are you using the Spearfish data set?
>>
>> I have replicated the example of the man page without problems.
>> Additionally, I have tried yours:
>>
>> GRASS 6.4.svn (spearfish60):~ > v.net.salesman myroads_net ccats=1-237
>> out=mysalesman2
>> Number of cities: [6]
>> Building graph...
>> Registering arcs...
>>  100%
>> Flattening the graph...
>> Graph was built
>>
>> Cycle:
>> Arcs' categories (layer 1, 107 arcs):
>> 4,4,4,4,4,4,5,5,4,2,2,4,4,4,5,5,5,5,5,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,2,2,2,2,3,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,5,5,5,5,5,5,4,4,4,4,4,4,4,4,4,4,2,2,2,4,4,2,2,2,2,2,2,2,2,5,5,5,5,4,4,4,4,4,4,4,4,4,4,4,4,4
>>
>> Nodes' categories (layer 2, 107 nodes):
>> 2,1,6,5,4,3
>>
>> Building topology for vector map <mysalesman2>...
>> Registering primitives...
>> 113 primitives registered
>> 872 vertices registered
>> Building areas...
>>  100%
>> 0 areas built
>> 0 isles built
>> Attaching islands...
>> Attaching centroids...
>>  100%
>> Number of nodes: 107
>> Number of primitives: 113
>> Number of points: 6
>> Number of lines: 107
>> Number of boundaries: 0
>> Number of centroids: 0
>> Number of areas: 0
>> Number of isles: 0
>>
>> -> no problem.
>>
>> Question: Which GRASS version are you using, whih operating system?
>>
>> I am using 6.4.0RC1 here.
>>
>> Markus
>> _______________________________________________
>> grass-user mailing list
>> grass-user en lists.osgeo.org
>> http://lists.osgeo.org/mailman/listinfo/grass-user
>>
>
> FYI, I have hadd good luck with v.net.salesman using the latest 6.4-SVN:
>
> http://casoilresource.lawr.ucdavis.edu/drupal/node/698
>
> Dylan
>

Thanks Dylan, Markus, and all great people from GRASS.

I think my error is due to something wrong with the data, not the code.

Anyway,  I will to download a fresh copy of GRASS sources from SVN. I
will try again and hope find the problem.

I will collect more information and data, to include in my questions,
if it becomes necessary.

I want to find the best route, but I do not rush. I am about to
receive a fresh year, full of time to continue using GRASS! Happy
2009!

Saludos
José María