I don't see why this discussion is so complicated. OSM tags are based on British English terms for historic reasons. In that contest there is a clean-cut distinction between a roundabout and a mini-roundabout: Quote from Wikipedia: "Mini-roundabouts can be a painted circle or a low dome but must be fully traversable." (from: https://en.wikipedia.org/wiki/Mini_roundabout#Mini-roundabouts) A small round-about, that has an obstacle in the middle (example: https://en.wikipedia.org/wiki/File:Pacionfi.JPG), is not a mini_roundabout, but a roundabout, albeit a small one.
Volker (Padova, Itlay) On 9 May 2012 04:10, Steve Bennett <stevag...@gmail.com> wrote: > The problems with this tag are the same with most tags. The history > goes something like: > > 1) The original creator has a very specific real-world object in mind: > painted roundabout patterns on intersections in their local area > 2) Other people in the local area recognise this real-world concept > and also apply the tag. > 3) Soon it makes its way into editors, renderers etc. > 4) People in other parts of the world see this tag and think they should > use it. > 5) They deduce what they think are the salient features: it's small, > it's painted, you can drive over it physically, you can drive over it > legally... > 6) Different kinds of real world objects get mapped with the tag, that > include some, but not all of the above salient features (eg, > roundabouts you can drive over, but are physically raised; or > roundabouts that are just painted but legally you must not drive over > them...) > 7) People notice the contradiction between the (poor) documentation > and current practice, and try to change it > 8) People who used the tag in step 6 object, because now it doesn't > match the way *they* use the tag. > > I'm not sure what the moral of the story here is, except that whoever > creates the tag originally has the easiest job, because the tags match > up beautifully with their local environment. (See highway=footway, > highway=cycleway, highway=bridleway, which actually appear as words on > signs in the UK - but compare the difficulty of applying them to > somewhere like Australia) > > I kind of think the only real solution is to have a fairly loose > coupling between regions about the definition of tags, and tight > cohesion within regions. So highway=mini_roundabout should universally > mean something like "small roundabout you could probably drive over", > but within a single region (either a country, or perhaps smaller), it > should have a much stricter definition, depending on local road laws, > building practices etc. > > (We do this already with tags like highway=motorway and > highway=cycleway, but we could be much more systematic.) > > Steve > > On Wed, May 9, 2012 at 2:18 AM, Erik Johansson <erjo...@gmail.com> wrote: > > On Mon, May 7, 2012 at 11:54 PM, Philip Barnes <p...@trigpoint.me.uk> > wrote: > >> On Mon, 2012-05-07 at 13:30 -0700, Paul Johnson wrote: > >>> On Mon, May 7, 2012 at 1:28 PM, Nathan Mills <nat...@nwacg.net> wrote: > >>> > So this is not/should not be a mini_roundabout? It seems a little > silly to > >>> > call it anything else, since the city just dug a hole in the center > of the > >>> > existing intersection, built a circular curb, and planted a tree: > >>> > > >>> > http://g.co/maps/e2gsv > >>> > > >>> > What about this one? Also a full on roundabout? > >>> > > >>> > http://g.co/maps/d6n74 > >>> > > >>> > This looks more like a roundabout to me: > >>> > > >>> > http://g.co/maps/hnbp9 > >>> > >>> All three are roundabouts, yes. > >> All 3 are roundabouts, none of them a mini-roundabouts. > >> > >> The point of a mini-roundabout is that they can be driven over, hence > >> whilst cars are supposed to go around them and many are 'speed-hump > >> raised' to encourage this behaviour. Trucks can pass over them as many > >> are in places where a truck cannot get around otherwise. > >> > >> The first 2 should be mini-roundabouts, as a truck is likely to have > >> serious issues with them. I cannot imagine that tree will last too long. > >> > >> This is a mini-roundabout, which you can see is raised slightly > >> http://g.co/maps/hm49m > >> Actually its part of the magic roundabout, which is a roundabout you can > >> go around in either direction, and at each intersection there is a > >> mini-roundabout. On osm its here, http://osm.org/go/eumbs5ZIw-- > >> > >> Phil > > > > > > But Nathan does have a point, mini-roundabouts are not a specifically > > good name, and the current docs will only make more people tag small > > roundabouts as highway=mini_roundabouts.. > > > > > > > > -- > > /emj > > > > _______________________________________________ > > Tagging mailing list > > Tagging@openstreetmap.org > > http://lists.openstreetmap.org/listinfo/tagging > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > http://lists.openstreetmap.org/listinfo/tagging >
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