Hello,
On 2018-01-13 22:06, Matej Lieskovský wrote:
I have a similar problem with the tagging of "Zone 30" and other such
restrictions.
I understand that having the tag on every road makes it easier for
consumers.
I think that when a restriction is conceptually an area, it should be
marked as an area
because we should be making use of the fact that we have a geospatial
database.
A relationship feels a little like having the disadvantages of both
approaches -
you need to keep track of all road segments, but it is worse for consumers.
I'd like to disagree on the "Zone 30" being an actual area: Here the
appropriate administration does usually not set a full area (with all
houses, parks etc.) as restricted but rather the individual connected
streets, which means that in my mind a relation would be the approach
that resembles the nature of these restrictions the most. But as you
already noticed: the relation does not really make things easier, so I
would rather stick to tagging the individual roads.
The only other option that comes to my mind would be something similar
to tagging city limit signs: Placing a node at the zone limits on the
highways (at the position where the "Zone 30" signs are in reality) and
tagging them with something like "traffic_sign=maxspeed_zone_limit" and
"maxspeed=30", would de facto also define the area correctly. The
problem here is of course that e.g. routing services would have a hard
time determining the maxspeed of enclosed streets (especially in the
rare case of a route not leaving such a zone), so that is not a really
suitable approach at the moment.
Kind regards
pbnoxious
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