+1 > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Randy > Sent: 28 October 2009 21:04 > To: [email protected] > Subject: [Tagging] Highway property proposal "covered=yes" > > 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 leading to it. That building has a small > ground level footprint, a small shop, a stairway, and an elevator. > The second floor (first floor to many) extends over a much > larger area, and a service road/parking area is under that > floor, open on three sides, therefore not a tunnel. The > service road should also be at the same layer as the ground > floor and the pedestrian ways. The second floor is > contiguous, so separating the building into two pieces one at > layer 0 and one at layer 1 is also misleading. Unless the > building is mapped as a complex relation of stacked layers, > there is no appropriate way, that I'm aware of, to map this > situation. And, from aerial photography, it's guess work to > map the hidden layers, anyway. GPS surveys can also be questionable. > > I propose that an additional property for highway of > "covered=yes" be used for this and similar situations, where > a road extends under a building, roof attached to a building, etc. > > > In addition to providing a proper tagging method, there is an > added benefit. There has been a continuing series of > rendering bug reports about roads being on top of buildings > rather than under them, independent of layering. This > property tag would also make it much easier for renderers to > render the way differently than on top of the building (or > other structure), independent of rendering sequence. My > proposed rendering would be parallel dashed lines with > transparent fill, similar to a tunnel, without the > entries/exits being drawn. > > -- > Randy > > > _______________________________________________ > Tagging mailing list > [email protected] > http://lists.openstreetmap.org/listinfo/tagging
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