[GRASS-user] obtain node sequence from v.net.salesman

[Moritz Lennert]

On 30/04/12 11:10, Gavin Fleming wrote:
>   Here's my route - it's easy enough to see the nodes but how to extract
> them in the order they need to be visited?
>
> v.select just selects them, but not in route order.

There's currently no official way of getting the node ids in order. 
However, there is a workaround that allows you to get that info using 
debug output:


[using the NC demo data]

v.net in=streets_wake points=schools_wake out=streets_with_schools 
operation=connect thresh=50
g.gisenv set=DEBUG=2
v.net.salesman in=streets_with_schools out=salesroute ccats=1-999

The last line of the output should look like this, giving you the 
category values of the nodes in route order:

Nodes' categories (layer 2, 994 nodes):
42,41,164,38,126,15,52,84,16,55,17,157,60,6,61,8,1,76,72,46,47,68,24,25,26,28

It should be fairly easy to add an option to v.net.salesman to output 
this information. Please file a wish in the bug tracker, also explaining 
which output format would be most suitable.

Moritz


>
>
>
> On 30/04/2012 10:21, Moritz Lennert wrote:
>> On 28/04/12 10:22, Gavin Fleming wrote:
>>> Hi all
>>>
>>> I've run v.net.salesman, which generates a nice route, but what I really
>>> need is the sequence of nodes that the solution visits, in the correct
>>> order. How can I obtain that from v.net.salesman outputs?
>>
>> How about v.select ain=nodes bin=route ?
>>
>> Moritz
>
> --
> regards
>
> Gavin
>
> Gavin Fleming
> http://afrispatial.co.za
> t: 0218620670
> c: 0845965680
> f: 0866164820
>