[Tagging] Highway property proposal "covered=yes"

[Anthony]

On Fri, Oct 30, 2009 at 5:24 AM, Pieren <pieren3 at gmail.com> wrote:
> On Thu, Oct 29, 2009 at 11:02 PM, Randy <rwtnospam-newsgp at yahoo.com> wrote:
>> Possibly just "building=roof"
>> would work (not my idea, someone else suggested it).
>
> I have a much bigger preference to "building=roof" or "building=cover"
> on the element on the top instead of some attribute on some
> hypothetical element below .

Or man_made=canopy?  http://en.wikipedia.org/wiki/Canopy_(building)  I
think I'm going with man_made=canopy.

But that doesn't work for "a building with a contiguous floor over a
parking area", unless you "split the building", in order to use
multiple layer tags.  The building exists at both layer=0 and layer=1.

Honestly, I don't like covered=yes here.  It's a hack, but unless and
until there is support for true three dimensional mapping, any
solution is going to be a hack.

Splitting the building into two parts, one at layer=0, touching the
parking area, and one at layer=1, encompassing both the area next to
and under the parking area, is another solution.  It's similar to what
we'd do with a highway when we want it to exist at multiple layers.
But it's probably unprecedented for buildings.