[OSM-talk] Mapnik handling of highways that are also landuse...

[Dermot McNally]

Folks - with reference to this:

http://www.openstreetmap.org/?lat=53.72339&lon=-6.34273&zoom=17&layers=B00FTF

...which is a section of the Mapnik render of the outcome of the very
successful Drogheda Mapping Party in Ireland. Towards the centre of
the map, you'll see what is represented as an oval area of residential
highway. I can almost see why, but it struck me that it represents
unwanted behaviour that could possibly be fixed.

What we have here is a closed way of type highway=residential.
Importantly, it isn't tagged as an area. It _is_ tagged (the same way)
as landuse=grass. So without understanding the internals of Mapnik,
it's as though the landuse, which applies at area-level, infects the
highway tag and causes it to be considered as an area too.

Clearly, I could simply draw a second way through the same nodes, and
there are plenty of heated discussions over which approach is the
saner. But it feels as though this tag combination ought to be able to
render correctly as is.

Dermot

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