Certainly, the portion of a canoe trail that crosses a lake or pond is indefinite. I assume also that any part that travels along a river would tend to follow its centerline. Such portions of a route can also be tagged as indefinite=yes but what do people think about the canoe route as waterway=fairway idea?
On Tue, Feb 12, 2019 at 9:12 PM Kevin Kenny <kevin.b.ke...@gmail.com> wrote: > On Tue, Feb 12, 2019 at 7:49 AM Dave Swarthout <daveswarth...@gmail.com> > wrote: > > > > The seamark definition in the supplied link is very general. I cannot > see how anyone could misinterpret this use of either waterway=fairway or > seamark:type=fairway unless they are specialists, in which case I'm sure a > response will be forthcoming. Regardless, I agree that the conflict note > should be removed. > > > > I would love to see the tag waterway=fairway accepted but I also hope we > can somehow make it applicable to canoe routes as well. A canoe route is > not as well defined as a shipping channel, for example, but it does have a > preferred path and well-defined put-in and take-out points. It does not, > however, typically have marker buoys or lights. If we removed that > requirement or made it optional, that would save a lot of energy in trying > to get a modification approved later. So, instead of saying: " A navigable > route in a lake or sea marked by buoys", it might say, "A navigable route > in a lake or sea usually marked by buoys. In the case of a fairway > describing a canoe route, there would typically be no buoys." > > > > Opinions? I think the fairway tag fits so well it might be appropriated > for use on such routes anyway. > > We recently were also discussing the idea of having an > 'indefinite=yes' tag to mark the indefiniite portion of the closed set > of ways that encloses a peninsula, isthmus, bay, strait, or similar > form. Is the on-water portion of a canoe route an indefinite way? (I > would imagine that portages are usually quite definite, but I've > carried on a few where the mud was only slightly too thick to pole or > paddle through.) > > It appears that the nearest thing on the seamark schema is > https://wiki.openstreetmap.org/wiki/Seamarks/Leading_Lines - and it > states specifically that the centreline of a fairway should not be > mapped. In the nautical world, there are usually well-defined and > charted limits of safe navigation, so that a fairway will be bounded > by clearing lines. In the canoe world, it is for the boatman to decide > where safe water is at the lake's current height or the river's > current rate of flow. > > I'd imagine that a canoe route that follows a river would ordinarily > share the river "centerline" or Thalweg with the 'river' object, > except for where it comes ashore to portage or is plotted in a > specific track around obstacles. On a paddle-and-portage from lake to > lake, the waterway portions are quite indefinite indeed! > -- Dave Swarthout Homer, Alaska Chiang Mai, Thailand Travel Blog at http://dswarthout.blogspot.com
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