On 10/05/12 18:31, Josh Doe wrote: > For those interested, you can download all current nodes > as a zipped OSM file > (http://joshd.dev.openstreetmap.org/all_mini_roundabouts_20120510.zip),
A *very* quick look at that against Bing imagery in JOSM reveals a pretty broad selection of things around the world that get classified as highway=mini_roundabout: * Yer classic blob of paint in the middle of the road. This might the predominant UK usage, and it's common here, but I'm guesstimating it's more like 50/50 even in the UK because (and this came as a proper surprise to me) it's also used for: * Small roundabouts/traffic circles with defined centres. Sometimes with quite large planted trees. * Big roundabouts/traffic circles, but fairly rarely; perhaps predominating in non-English-speaking countries, or countries which have no concept of size distinctions between their traffic circles? * Unmarked passing places, where cars can overtake each other on narrow roads. * Turning circles at the ends of residential roads, with or without centres. * AFAICT, just random intersections without anything specific. I wonder how it would be possible to get a more systematic analysis of this data extract. Perhaps a small app which grabs relevant Bing tiles for nodes at random and asks the user to classify as yes/no/can't tell...? (But in short the db data sucks and so does the wiki documentation. Perhaps the question we should be asking ourselves is which one to fix up and how... sigh.) -- Andrew Chadwick _______________________________________________ Tagging mailing list Tagging@openstreetmap.org http://lists.openstreetmap.org/listinfo/tagging
