Hi, Anthony wrote: > On Thu, Nov 12, 2009 at 5:41 PM, Frederik Ramm <frede...@remote.org> wrote: >> I would also strongly encourage you to use one such line on each side of the >> road, instead of putting tags on the road itself. This makes it very clear >> which side an address is on, better than any tags you can put on the way, no >> matter how many "left/right" prefixes or suffixes you add to those tags. > > Would you map a "no right turn" as a node 7 meters behind and to the > right of an intersection? After all, that's "more or less what's on > the ground".
I might be missing some irony here. I don't know the significance of "no right turn" for you, and I don't know what it has to do with addressing. Traffic signs, at least where I live, usually are there as a physical reminder (or notification) of an abstract concept. The administration makes a certain decision - for example, that parking should not be allowed in a certain location, or a speed limit should be put in place, or whatever. Then signs are put up to inform people of this decision. The exact location of the signs is often an "implementation detail". The sign itself is irrelevant; the abstract concept is what matters. I try to map the abstract concept wherever possible. Consequently, I'd map a "no right turn" as a relation involving two ways, and not in the form of a traffic sign. I consider interpolation ways to be an abstract thing also. To convey the information, they need to be on each side of the road, but, if that was your question, to me it doesn't matter whether they are a few centimetres away from the road or 10 metres away. As long as there is no doubt (for the person viewing the situation in an editor) which road they belong to, it's fine. In practice it turns out that you often draw the lines approximately where the houses would be on the ground, but to me that is not relevant. Bye Frederik -- Frederik Ramm ## eMail frede...@remote.org ## N49°00'09" E008°23'33" _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk