2009/10/28 Lesi
> > how do you define "main area"?
> > Aren't the shafts vertical access / ventilation shafts that
> > lead to the inner mine? IMHO that defines them as
> > part of the mine (and indicates that they should be comprised).
>
> The main area is the area where all the bigger buildings
I have run into several situations where a service road extends under a
covered area, such as a building.
Layering is one way to tag the building/road system, but, technically, it
is not always a correct way. Example: a building on the ground is at layer
0, associated with any pedestrian ways l
