[Tagging] area=yes on polygones (was Block names)

Anthony osm at inbox.org
Tue May 1 16:56:44 BST 2012

On Tue, May 1, 2012 at 6:04 AM, Martin Koppenhoefer
<dieterdreist at gmail.com> wrote:
> 2012/5/1 Pieren <pieren3 at gmail.com>:
>> Not only mine. I'm still waiting at least a single example where a
>> closed way for platforms is not an area (and rendering issue cannot be
>> fixed by splitting the way for instance).
> our data model should not need hacks like "split the way to fix
> rendering issues". It should be clear whether an object is an area or
> not (that's why I prefer explicit area=yes/no for cases which might be
> ambiguous).

What about closed ways tagged with barrier=* and some other ambiguous
*=* (e.g. barrier=hedge & amenity=marketplace).  I guess you could
just put the amenity=marketplace on a multipolygon, and keep the

So the official behavior of routers/renderers/etc on closed ways
ambiguously not tagged as area=yes/no is undefined, though it is
strongly suggested that data users assume area=no for highway=* and
barrier=*.  Maybe we even carve out an exception for highway=* and
barrier=*, though I'd just as well we tag them explicitly too,
whenever they are closed.

Yes, I think this is a good solution.

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