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

[Dylan Beaudette]

On Wed, Dec 31, 2008 at 5:20 AM, Markus Neteler <neteler at osgeo.org> wrote:
> Hi José,
>
> On Wed, Dec 31, 2008 at 8:39 AM, José María Michia
> <jose.maria.michia at 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
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>

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