On Tue, Oct 26, 2010 at 3:19 PM, Peter Wendorff <wendo...@uni-paderborn.de> wrote: > Am 26.10.2010 20:35, schrieb Anthony: >>> >>> Perhaps you are right - but please, can you give me an example? >>> I cannot imagine why there should be a stop sign without intersection. >> >> I'll try to get you an example, but first you have to precisely define >> "intersection" using words like "way", "node", "highway", "barrier", >> "traffic_calming", etc. > > I know stop signs (these octagonal red traffic signs with text telling > "stop" inside - in any language perhaps) at intersecions only. > > An intersection for me is a "point" in space where more streets join > together, so that you have a choice where to go next even without turning > around and going back.
Only streets? What about a crosswalk, or a railroad crossing? You have to have a choice? An onramp is not an intersection? A T-intersection with two one-way roads? > In OSM terms an intersection would be a node shared by three or more way > segments (meaning: parts of ways). Each of these ways is tagged as highway=* > describing a street or way (in non-osm term meaning). There can be a way > tagged as railway=* also, I think. Okay, well, one clear exception would be http://www.losgatosobserver.com/los-gatos/article-images/2008/03/bridge06.jpg Furthermore, I think such a definition of intersection would break in cases where there is a driveway (or cycleway, or service exit, or crosswalk, or railroad crossing), right before an intersection, closer to the stop line than the intersection. I don't have any pictures of that at the moment, though. _______________________________________________ Tagging mailing list Tagging@openstreetmap.org http://lists.openstreetmap.org/listinfo/tagging
