[GraphHopper] Question about traffic signals

[Peter]

Hi,

this is possible but kind of tricky with the current import procedure.
You'll have to determine which OSM nodes belond to which GH node (keep
in mind that for certain situations, especially for car, one OSM node
could also be on an GH edge). So you will need to store a traffic signal
counter per edge and put it e.g. into the flags. Please read also
through: https://github.com/graphhopper/graphhopper/issues/75

Regards,
Peter

On 27.02.2015 20:24, 高安琪 wrote:
> Hi,
>
> I am a student majored in computer science from University of
> Nottingham. There is a group project for my second year module. We are
> working on adding new features to Graphhopper.
>
> We try to show the number of traffic signals to user on Graphhopper.
>
> We get the number of traffic signals by using node.hasTag(). Then
> store it in OSMWay.
>
> We show the number of traffic signals for specific way on the
> front-end. (we do it in the same way as showing road name of specific way)
>
> The problem is that user may pass through a part of road(OSMWay), not
> entire road(OSMWay) and it shows the total traffic signals on this
> roads which is useless for user.
>
> E.g. There are 2 traffic signals on Ilkeston Road, user will encounter
> one of them. We do it in the way mentioned above and it just shows the
> total traffic signals instead of the exact number of traffic signals
> user may encounter.
>
> 内嵌图片 1
>
> May I ask is it possible for us to show exact number of traffic
> signals user may encounter. If we could do it, may I ask for some
> suggestions about how to implement it?
>
> Regards,
> Anqi
>
>
>
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