[Tagging] mapping default values? (was: Maximum snelheid in Vlaanderen, maxspeed in Flanders)

Jo winfixit at gmail.com
Wed Oct 5 09:20:00 UTC 2016


We now have 1 country with 2 differing default values, depending on the
region you happen to be in. A bit annoying. We'll probably need to tag all
of them explicitely with maxspeed values. OTOH, we were already doing that
anyway.

Polyglot

2016-10-05 11:00 GMT+02:00 Martin Koppenhoefer <dieterdreist at gmail.com>:

>
> 2016-10-05 3:35 GMT+02:00 André Pirard <a.pirard.papou at gmail.com>:
>
>> I don't think that default values like maxspeed=*,  driving_side=*, or
>> even oneway=no should be tagged on highways.
>> Most roads (in Belgium and in the world) don't contain any, BTW, and it
>> makes no sense using a few.
>> A default values specification should be used instead.
>> Those tags should be contained in the highest level administrative
>> boundary relation or equivalent in which they apply.
>> maxspeed=70 should apply to Flanders and maxspeed=90 to Wallonia.
>>
>
>
> what you propose is not working, because speed limits are about roads, not
> administrative entities. You have to know the context (rural/urban inside
> settlement according to traffic law, etc.) in order to assign a maxspeed,
> and the only way we currently use to understand which context applies are
> the source:maxspeed values. It is very simple, doesn't require
> preprocessing, can be applied by everyone without looking for and
> downloading surrounding administrative polygons, and is also quite
> reliable. Why would we give this up?
>
> Cheers,
> Martin
>
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