[Routing] IRouteMetric selection for TurnRestrictedMultiTargetDijkstraRouter route method

[Marcus Wolschon]

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Am 06.09.2010 15:05, schrieb Oleg Demchenko:
> Hi Marcus and All.
>
> I'm successfully running route estimation method with a default
> ShortestRoteMetric, but results are not acceptable for my task.
> method selects short, but very small roads first, instead of
> motorways and other fast driving roads.
>
> From a description I see that most suitable for my task is
> StaticFastestRouteMetric - metric counting the travel-time of the
> way using fixed averaged for known highway-types
>
> But when I'm trying to initialize StaticFastestRouteMetric object
> , I'm get an exception from TrafficMessageStore.java module, when
> program trying connect to external Traffic Message source
>
> private TrafficMessageStore() { *        this.myDatabaseURL =
> Settings.getInstance().get("tmc.storepath", getDefaultURL());*
> this.myConnection = getConnection(); }

What exception do you get?



>
> I don't need any TrafficMessage for my purpose. Metric which
> prefer "fastest" roads building a path, will be suitable for my
> situation.
>
> Questions: 1) how to remove traffic logic from this metric?

Take the source, copy this metric to a new file, remove it, rename it
and there you have a new Metric.

> Any setup or command line parameter?
Obvisiously you can store the empty tmc-message -store in another
directory using the
*tmc.storepath -setting
(in ~/libosm/preferences.xml or using the --set or --override
paramerters described
in --help or at
http://sourceforge.net/apps/mediawiki/travelingsales/index.php?title=Traveling_Salesman
)
*
There is no way to use a command-line parameter to remove code from a
class.

> 2) In which source is defined average car speed depending on a way
> type?
>

The code of the metric should tell that:
http://travelingsales.svn.sourceforge.net/viewvc/travelingsales/trunk/osmnavigation/src/org/openstreetmap/travelingsalesman/routing/metrics/StaticFastestRouteMetric.java?revision=1499&view=markup
they are fixed for the cost-calculation in the sourcecode at this time.

At some later time these:
http://travelingsales.svn.sourceforge.net/viewvc/travelingsales/trunk/osmnavigation/src/org/openstreetmap/travelingsalesman/navigation/traffic/
may be used. Currently they are only used for getEstimatedSpeed() .

Marcus

> p.s. I'm using last versions of libosm,  osmnavigation and
> TravelingSalesMan project downloaded from SVN.
>
> Thanks in advance.
>
> -- All the best Oleg Demchenko
>
>
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> list Routing at openstreetmap.org
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