[Tagging] landuse=residential and named residential areas which belong together (neighbourhoods/subdivisions?)

[Bryce Nesbitt]

On 08/31/2011 02:40 AM, Martin Koppenhoefer wrote:
> 2011/8/31 Bryce Nesbitt<bryce2 at obviously.com>:
>> I'm a city dweller. We have some (and will soon have some very prominent)
>> rooftop parks.
> That's fine, you can tag them with leisure=park (or maybe
> leisure=garden, and garden:type)
>
> http://wiki.openstreetmap.org/wiki/Tag:leisure%3Dgarden
> http://wiki.openstreetmap.org/wiki/Proposed_features/Garden_specification
It was a stacking comment.  The renderers seem to implicitly stack 
buildings on top
of land use, so it won't created the desired results.

The question is: should it be sufficient to imply that a landuse polygon 
wholly inside of another land use polygon belongs "on top"? Or is it 
really necessary to cut a hole in the outer polygon?

The existing "layer <http://wiki.openstreetmap.org/wiki/Layer>=x" tags 
are in fact active in mapnik at least: one can stack land use.
I feel new mappers will be much more likely to get layers right, rather 
than relations/multipolygons.
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