[Qgis-developer] extract traffic signal positions from OSM data

[Anita Graser]

Thanks Barry,

I found that the OSM XAPI is pretty powerful. Downloading all traffic  
signals is as easy as:

http://xapi.openstreetmap.org/api/0.6/node[highway=traffic_signals][bbox=16.26,48.18,16.31,48.20]

Still the OSM plugin for QGIS doesn't seem to download/interpret/render  
traffic signals.

Best wishes,
Anita


Am 07.06.2010, 12:51 Uhr, schrieb Barry Rowlingson  
<b.rowlingson at lancaster.ac.uk>:

> On Mon, Jun 7, 2010 at 11:28 AM, Anita Graser <anitagraser at gmx.at> wrote:
>> Hi,
>>
>> I noticed that on openstreetmap.org, you can see positions of traffic  
>> signals (traffic lights). When I download OSM data of the same region  
>> using Openstreetmap plugin 0.5, it seems like these points are not  
>> downloaded. From their wiki, I found that it should be a "highway"  
>> attribute, but in highway column I only saw "bus_stop" entries.
>>
>> Does anyone know how to download information on traffic lights from OSM  
>> via the existing plugin or where I should apply changes?
>
>  I've just grabbed some OSM data using the OSM API, and traffic
> signals are tagged thus:
>
>  <node id="2405151" lat="54.0449694" lon="-2.7991142" user="Darren
> Poulson" uid="23507" visible="true" version
> ="2" changeset="621616" timestamp="2008-01-13T14:08:27Z">
>   <tag k="highway" v="traffic_signals"/>
>  </node>
>
>  That was in the XML returned by:
>
> wget  
> "http://api.openstreetmap.org/api/0.6/map?bbox=-2.80,54.042,-2.77,54.045"
>
>  so I don't know why you're not seeing them, unless you didnt get the
> right area....
>
> Barry


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