[OSM-talk] Zonal restrictions.

[marcus.wolschon at googlemail.com]

On Wed, 13 May 2009 15:54:36 +0100, Dave Stubbs <osm.list at randomjunk.co.uk>
wrote:
>> The first thing I thought of when reading this is, to use a relation.
>> 'Relations are not categories' applies to people making relations out of
>> "all hotels" or "All hotels in London", doesn't really apply here.
>>
>> type=zone
>> name=Dublin Centre
>> maxspeed=20kph
>> parking=no
>>
> 
> Where "zone" is a known geographic area?
> A bounding way with tags like:
>  zone = restriction
>  maxspeed = 20kph
>  parking = no
> 
> seems like the best way to do it to me if you don't want to just
> replicate the tags on everything (and I can understand why you
> wouldn't want to do that).
> There's no software that'll pay attention to it atm, but then it's not
> long ago that everything ignored route relations too.
> 
> I really wouldn't recommend relations for specifying what things are
> inside an area. It's a waste of two entire dimensions our dataset
> happens to have.

I completely agree here.
A polygon is a simpler, easier to evaluate, to tag and
much, much less error-prone way to do this compared to
a relation that has all ways in that area as members.

Marcus