[GraphHopper] Question about traffic signals

[Peter]

Yes, good idea. Then you'll have a bit more nodes but an easier handling

Regards,
Peter

On 27.02.2015 21:29, dos65 wrote:
> Perhaps it may be easier to import traffic lights nodes as tower nodes?
>
> On 27.02.2015 22:54, Peter wrote:
>> 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
>>>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/graphhopper/attachments/20150227/7e63c97d/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/png
Size: 356748 bytes
Desc: not available
URL: <http://lists.openstreetmap.org/pipermail/graphhopper/attachments/20150227/7e63c97d/attachment.png>