[Tagging] Traffic sign direction tagging..

[Simon Poole]

I actually mentioned the issue in Milano.

Essentially traffic_sign, traffic_sign:forward and traffic_sign:backward
need to be treated as "object" tags as things are now.

See pages 29 and 30
https://drive.google.com/open?id=1LVmZIaEvd1K7mYVqDLnrhC5-jHLHy0lQ

And I should note that iD has "plot" as such a key which is equally
mysterious, but I couldn't quite convince myself to include in the list.

Simon


Am 28.09.2018 um 04:51 schrieb Bryan Housel:
> Hey Tagging List!
>
> While reviewing a pull request to add Traffic Sign presets to iD, I
> came across a tagging issue with how traffic sign directions are tagged.
> The details are here https://github.com/openstreetmap/iD/pull/5333 and
> relevant guidance on the OSM wiki is quoted below:
>
>> *Traffic sign as a separate node*
>> https://wiki.openstreetmap.org/wiki/Key:traffic_sign#As_a_separate_node
>> Create a separate node beside the road at the position of the actual
>> sign... You can use the `direction=*` tag to describe the facing
>> orientation of the sign by using an angle or cardinal direction.
>
> ^ This is ok!  iD supports `direction=*` and will even render a view
> cone at higher zooms so mappers can see which direction it points.
>
>> *Traffic sign along a way*
>> https://wiki.openstreetmap.org/wiki/Key:traffic_sign#As_part_of_a_way
>> Create a new node within the relevant way next to the sign... You can
>> use `traffic_sign:forward=*` to specify that this sign affects
>> vehicles moving in the same direction as the OSM way. The opposite
>> direction can be tagged with `traffic_sign:backward=*`. Formerly
>> the `direction=*` key has also been used to describe the affected
>> direction. But its common meaning has changed to Relative to
>> Geographic North.
>
> ^ This is the problem.  The wiki says we are supposed to do something
> like `traffic_sign:forward=US:R1`, and we can't really do that. A
> preset needs to be based on a "toplevel" tag
> like `traffic_sign=*` not `traffic_sign:forward=*` or `traffic_sign:backward=*` (remember
> seamark? many of their tags have this issue too, where they put a
> value in the key part, and so we can’t turn it into a preset).
>
> So instead what we’ve decided to do is:  Support a tag
> `traffic_sign:direction` which works exactly the same as the existing
> and well supported `traffic_signals:direction`
>
> See https://wiki.openstreetmap.org/wiki/Key:traffic_signals:direction
> iD already has support for  `traffic_signals:direction=forward/backward`
>
> To keep things simple, we'll do the same thing for traffic signs:
> `traffic_sign:direction=forward/backward`
>
> Thanks,
> Bryan
>
>
>
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