Also note that there are some implications in 2d mapnik rendering.
With the building outline we define and the mapnik rules that were
set upto render everything highway=* _above_ anything else, the
renderer _will_ overlap a building outline with a pedestrian area.
Esp. when (highway=pedestrian area=yes) connects seamless to the
ground level building part:
__ building outline extents up to here
/
|
v
._____________flat_roof_
| level 3
|_______________________
| level 2
|___________________________
| ground level
pedestrian |
area outside |______________
^~ pedestrian area extents up to here
Greetings
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