On 09/03/2015, Warin <61sundow...@gmail.com> wrote: > Sharp curves .. would they not be obvious from the map it self .. one > node on the sharp corner compared to many for a 'smooth' corner.'Masked' > corners where some object hides on coming traffic (e.g. building, > vegetation) are also a hazard. > > These hazards exist for all kinds of traffic and not indicated on maps. > Usually people are expected to be aware of their surroundings, not to > rely on other aids as to what is visually obvious? :-\
From the osm perspective, all these extra bits of information may not maped yet (road width, vegetation height...) or ever (relief). Even when they are, deducing the visibility algorythmically is hard. You might not want to render hazard=curve, but still want to provide it to drive-assist software. As for drivers being aware of their suroundings, if the local authority decided to signpost a curvy road, it's a good hint that osm should as well. It's not much different from tagging maxspeed. _______________________________________________ talk mailing list talk@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk