Layers don't work when there are area/way conflicts, because the norm for rendering is to draw areas first then ways on top. So you have to have a flag that says "this way isn't really on top". We have a perfectly adequate flag for this function (tunnel=yes), but people objected to using that for things that are not strictly tunnels. So we spawned "covered" as an alternative. I suspect it's also used to flag whether a walkway is covered or not, which is a rather different situation.
I just use tunnel=yes (I guess one could add something like tunnel:type=building|cloister|avalanche|arcade, though I don't expect anyone to use it). In the UK covered=yes 345 covered=no 480 tunnel=yes 7662 Richard On Mon, Jul 19, 2010 at 9:56 PM, M∡rtin Koppenhoefer <[email protected]> wrote: > the covered page lists these use-cases: > A. denote that a highway, railway, pedestrian way or waterway passes > under a building or other structure, where it is inappropriate to use > layering as the differentiator between covered and uncovered. or where > "covered" will more clearly define the condition. > > > -> fine, but why not for those ways passing inside a building? > > > B. denote that a power line, water main, water drain, etc., in a > narrow trench, has a removable and replaceable covering, allowing for > maintenance, and thus potentially allowing it to be traversed without > a bridge. > > > -> quite limiting. The "potentially" part is IMHO not good in a > definition. Why must the covering be "removable and replaceable" and > which covering is not "removable" if you put enough effort into it's > removal? Why must the power line, water drain etc. be "in a narrow > trench" ? > > > C. denote an area such as an underground parking lot, a covered > reservoir/cistern or even such things as an aquarium (e.g., Kelly > Tarlton's, Auckland, NZ), when the covering is not a man-made > structure that would allow layer differentiation. > > -> Why shouldn't the covering structure be man made, or does this > exclude just man_made structures where layering cannot solve the > problem (e.g. more than 11 levels)? > > > I think we should rework this definitions. Comments? > http://wiki.openstreetmap.org/wiki/Key:covered > > > Cheers, > Martin > > _______________________________________________ > Tagging mailing list > [email protected] > http://lists.openstreetmap.org/listinfo/tagging > _______________________________________________ Tagging mailing list [email protected] http://lists.openstreetmap.org/listinfo/tagging
