[OSM-talk] zones for motorway/in town/outof town?
benlaenen at gmail.com
Thu May 21 18:13:33 BST 2009
On Thursday 21 May 2009, Radomir Cernoch wrote:
> Ben Laenen píše v Čt 21. 05. 2009 v 17:54 +0200:
> > So while it seems to be a polygon vs tags on ways discussion:
> > I wonder what people have against using relations to combine all
> > roads in one built-up area, or one maxspeed zone, or some other
> > kind of zone. It's really the cleanest option and allows for
> > additional tags like a name, and it allows everything to be more
> > clearly defined, and allows for a method which is much more
> > flexible and allows for extended properties.
> How would a typical city look like? All 80 km/h roads in one relation
> and all 50 km/h roads in another relation? Or one relation per
A typical city here would look like all roads inside the built-up area
inside one relation, and when there are roads inside it with another
speed limit, tag those ways with maxspeed.
And for zone 30's inside built-up areas: each zone 30 will have its
relation as well, and due to a simple precedence rule (a relation with
zone=built-up area has less precedence than other relations) the speed
limits are known there as well.
> And what about while countries: all rural 90 km/h roads in one
No, because there's no special property on those roads. Those wouldn't
be tagged with anything or wouldn't be a member of any relation if
there are no speed limits signed on that road.
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