[Routing] IRouteMetric selection for TurnRestrictedMultiTargetDijkstraRouter route method

[Marcus Wolschon]

On Tue, Sep 7, 2010 at 11:36, Oleg Demchenko <oleg.demchenko at gmail.com> wrote:
> Hi Marcus.
> First of all thank you for you prompt response. Debugging my data I've
> review your metric/navigation code and found it very smart,
> precise and heuristic.
>
> Regarding Traffic messages: my understanding that using iDataset specified
> for a metric object you are creating several tables there and downloading
> (probably using other plugin/process) to those tables traffic data from an
> external source.

No, IDataSet is the map.
TrafficData is temporary data and used live in the metric and not
stored in the map.
The TMC-implementation for traffic data stores messages in it's own
H2-database until
they expire.


> Error happened during execution of
> private TrafficMessageStore myTrafficMessages =
> TrafficMessageStore.getInstance();
> I think reason was I forgot initialize metric object iDataset with  setMap
> method. Type of error was : cannot find datasource.

If the h2.jar in your classpath? The databse is created if it does not exist.


> OK, I commented myTrafficMessages initialization and set
> Collection<TrafficMessage> allMessages = null during initialization. So, not
> traffic blocks anymore :-)

Works too. ;)

> Also I've met some challenges to find way maxspeed within getEstimatedSpeed
> method.
> 1) Method can't determine a country (there is no country specified in
> attributes for the most ways/nodes in a file) and fails with exception
> trying to find max speed for a country (DEFAULTCOUNTRY) and way type. OK,
> I've corrected a code a little bit, because I "know" a country.

> 2) There is a challenge within TrafficRuleManage class, when metric trying
> to check inCity attribute. Exceptions happens within  public static
> IAddressDBPlaceFinder getCities(final IDataSet aMap). Can you tell me more
> how it is working?. It is supposed call to external service/application or
> class should find it using *.OSM (iDataSet) data itself? How can I set city
> borders for my (country) area/data? I really would like to keep this logic,
> because car speed within cities is slower.

It is supposed to use the supplied map to find out if you are without
a city-polygon
or within a radius around a city-node.
It may reuse the address-database build during map-import if I
remember correctly.