OK, so now I actually read it: According to wikipedia a floating or impounded dock is a dock isolated from changing tides through locks.
dock=floating is used for floating dry docks (something completely different) dock=tidal is used for what wikipedia describes as an impounded dock The second one is a bit strange, as I would think that implies dock=tidal equals "a dock that is not tidal" :) That raises the question: how do you tag a dock that is in fact affected by tides? I did not seem to find a tag for that, did you guys? 2017-02-24 8:30 GMT+01:00 joost schouppe <[email protected]>: > I'll pass the issue with definition of tidal vs floating on to the tagging > mailing list to see if there is some strange logic behind it we're missing; > and report back here. > > 2017-02-24 0:12 GMT+01:00 Vincent Van Eyken <[email protected]>: > >> Indeed many (most) docks in the Port of Antwerp are tagged twice / are >> represented by 2 entities in OSM: once as an area (with waterway=dock) and >> once as a linear way (waterway=canal). And I admit to be partly responsible >> for tagging those docks like that. >> >> Here is my take on the reason behind that scheme: >> - those docks are relatively large bodies of water, hence the requirement >> for the area to be mapped, with the according waterway=dock tag. >> - but they are also used as navigable waterways, similar to highways, and >> therefore (also) need a linear element, running along their centre >> line/thalweg, to easily enable (logical) route calculation; e.g. brouter >> already provides route calculation along waterway lines [1] >> As a linear element, their function is imho more like that of a canal, >> hence the waterway=canal. Of course, this especially makes sense for an >> actual "Kanaaldok", but it might be disputable for a dock with only 1 >> entry/exit (like a "cul-de-sac") >> >> So basically it is very similar to the tagging scheme for (large) natural >> rivers[2]: a linear, navigable way (waterway=river), combined with one or >> more closed areas (waterway=riverbank), or the "street/highway area" scheme >> for very detailed mapping of roads. >> >> The messy rendering is of course a result of the fact that both line and >> area carry the same name, but I suppose that in itself is not a valid >> reason for change. >> >> As to the types of docks on the wiki: certainly the description for >> dock=tidal does seem counterintuitive or even wrong... not sure what to >> make of it... >> >> >> [1] http://brouter.de/brouter-web/#zoom=12&lat=51.3012&lon=4.328 >> 6&layer=OpenStreetMap&lonlats=4.277115,51.346912|4.412899, >> 51.254556&nogos=&profile=river&alternativeidx=0&format=geojson >> [2] http://wiki.openstreetmap.org/wiki/Rivers >> >> >> >> -----Oorspronkelijk bericht----- >> Van: Michaël Dierick [mailto:[email protected]] >> Verzonden: vrijdag 10 februari 2017 18:20 >> Aan: [email protected] >> Onderwerp: [OSM-talk-be] Docks (Antwerp port) >> >> Hi, >> >> While looking around on the map at the port of Antwerp I noticed some >> docks are tagged as a waterway=dock as well as canals (waterway=canal) >> which results in a somewhat messy rendering ... any ideas on this? (do >> docks need to be tagged as canal as well)? >> (https://www.openstreetmap.org/#map=15/51.2551/4.3808) >> >> Further when looking at the wiki the definitions of dock=tidal and >> dock=floating seem somewhat mixed up (see wikipedia @ >> https://en.wikipedia.org/wiki/Floating_dock_(impounded) and >> https://en.wikipedia.org/wiki/Dock_(maritime)#British_English ) ... >> could someone confirm this? >> >> Thanks, >> >> Michaël >> >> PS: In maritime environments OSM is used quite a lot (indirectly) through >> www.marinetraffic.com >> >> _______________________________________________ >> Talk-be mailing list >> [email protected] >> https://lists.openstreetmap.org/listinfo/talk-be >> >> >> _______________________________________________ >> Talk-be mailing list >> [email protected] >> https://lists.openstreetmap.org/listinfo/talk-be >> > > > > -- > Joost Schouppe > OpenStreetMap <http://www.openstreetmap.org/user/joost%20schouppe/> | > Twitter <https://twitter.com/joostjakob> | LinkedIn > <https://www.linkedin.com/pub/joost-schouppe/48/939/603> | Meetup > <http://www.meetup.com/OpenStreetMap-Belgium/members/97979802/> > -- Joost Schouppe OpenStreetMap <http://www.openstreetmap.org/user/joost%20schouppe/> | Twitter <https://twitter.com/joostjakob> | LinkedIn <https://www.linkedin.com/pub/joost-schouppe/48/939/603> | Meetup <http://www.meetup.com/OpenStreetMap-Belgium/members/97979802/>
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