[pgrouting-users] indifcating one way streets with to_cost/reverse_cost

[Dave Potts]

 I am confused  about the one way street issues.

The page  http://www.pgrouting.org/docs/howto/oneway.html, says use a high
 cost value eg 1000, but the page
 http://www.pgrouting.org/docs/1.x/dijkstra.html says 'a negative cost will
 prevent the edge from being inserted in the graph' ie use -ve value for a
 cost.

 Which is thecorrect value to use ?


 Dave.
> ============================
> Daniel Kastl wrote:
>> On Wed, Jan 18, 2012 at 4:31 PM, Dave Potts <dave.potts at pinan.co.uk>
>> wrote:
>>
>>> Ok the matter is addressed in
>>>
>>> http://www.pgrouting.org/docs/howto/oneway.html
>>>
>>> You just make the value for the cost to be very high, is there a given
>>> value that should be used?
>>>
>>
>> Well, you can make it high that you can be sure that it will be longer
>> than
>> what could be a valid total length of a route.
>> And if your result will be longer than that, you can assume that it took
>> a
>> one-way street in the wrong direction, because probably there was no
>> other
>> way.
>>
>> Daniel
>>
>>
>>
>>
>>
>>>
>>> Dave Potts wrote:
>>> >
>>> >
>>> > Hi
>>> >
>>> > Is there a way of saying the link between nodes A and B in a given
>>> network
>>> > is a one way connection?
>>> >
>>> > I had assume that setting the to_cost/reverse_cost would be the way
>>> to
>>> go,
>>> > but I have not see this type of thing describe on any of the web
>>> pages.
>>> >
>>> > regards
>>> >
>>> >
>>> > Dave.
>>> >
>>> > --
>>> >
>>> >
>>> > _______________________________________________
>>> > Pgrouting-users mailing list
>>> > Pgrouting-users at lists.osgeo.org
>>> > http://lists.osgeo.org/mailman/listinfo/pgrouting-users
>>> >
>>>
>>>
>>> --
>>>
>>>
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>>
>>
>>
>> --
>> Georepublic UG & Georepublic Japan
>> eMail: daniel.kastl at georepublic.de
>> Web: http://georepublic.de
>>
>
>
> --
>
>


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