On Wednesday 2012-11-21 08:50 +0000, Kytömaa Lauri wrote: > >Can we start using relations for this already? Really seems like that > >provides the specifics we want for this. > > So far nobody has provided a real world example of a place where the simple > distance-to-next would not be correct. If somebody does that, then a relation > could be made up.
An example in my neighborhood of San Francisco is the stop signs on 21st Street where it crosses the J-Church MUNI tram line (where the J-Church is deviating from Church Street to go around a steep hill): http://www.openstreetmap.org/?lat=37.7566&lon=-122.4269&zoom=18&layers=M There are stop signs on both sides of the tram line (which I tagged as nodes with highway=stop). These are visible in the Bing imagery: http://www.openstreetmap.org/edit?lat=37.7565&lon=-122.4269&zoom=21 since many urban areas in California have the habit of painting their stop signs as markings in the road (the word STOP and then a thick white line, representing the stop line) in addition to using signs. The stop sign on the east side of the tram line, however, is (I think) closer to Chattanooga Street than it is to the tram line. (Traffic turning left from Chattanooga Street northbound onto 21st Street westbound must, in theory, stop *twice*, the first time due to the implicit stop sign from California's rule for unmarked T-intersections, and then again just after turning for the stop sign.) Even worse, there isn't actually an intersection node between 21st Street and the J-Church tram line. So I fully admit this is a particularly hard case [1]; even using http://wiki.openstreetmap.org/wiki/Proposed_features/Relation:type%3Dstop would require adding an extra node. -David [1] http://en.wikipedia.org/wiki/Hard_cases_make_bad_law -- 𝄞 L. David Baron http://dbaron.org/ 𝄂 𝄢 Mozilla http://www.mozilla.org/ 𝄂 _______________________________________________ Tagging mailing list [email protected] http://lists.openstreetmap.org/listinfo/tagging
