[Routing] Question about turnrestrictions

[Christian Vetter]

Hi,

Many routing applications only support a single "from", "to" and "via"
entity. Actually, most only support restrictions in the form:

from way1 via node to way2.

So if you want to add a relation that is understood by as many
applications as possible, I would advise you to split it into 4.

Best regards,

Christian

On Tue, Jul 31, 2012 at 11:19 AM, Gubler, Ruediger <rgubler at init-ka.de> wrote:
> Hello,
>
> I have a question about the below turn restriction definition
>
> <osm version="0.6" generator="OpenStreetMap server">
>   <relation id="339483"
>    visible="true"
>    timestamp="2012-06-29T07:37:40Z"
>    version="4"
>    changeset="12053445"
>    user="Drachentoeter"
>    uid="63726">
>     <member type="node" ref="82520384" role="via"/>
>     <member type="way" ref="49025950" role="to"/>
>     <member type="way" ref="28191636" role="from"/>
>     <member type="way" ref="169412714" role="from"/>
>     <member type="way" ref="169412708" role="from"/>
>     <member type="way" ref="169412713" role="from"/>
>     <tag k="restriction" v="no_left_turn"/>
>     <tag k="type" v="restriction"/>
>   </relation>
> </osm>
>
> According to the wiki (http://wiki.openstreetmap.org/wiki/Turn_Restriction) multiple from roles are only allowed at
> restriction=no_entry or restriction=no_exit elements.
>
> Is the above definition correct and the wiki is wrong or must the relation be divided into 4 parts?
>
>
> Yours Rüdiger
>
>
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