Actually it can be quite important even for a canoe. Perhaps not in my particular example but some bigger lakes have obstacles like islands or areas with heavy headwinds that are best avoided. Even in the small lake at center of my area of interest, Spruce Lake, the trail divides. One leg heads south, the other west. River routes have their own set of problems: channels that go nowhere, rapids, etc.
On Tue, Mar 25, 2014 at 7:30 PM, John F. Eldredge <j...@jfeldredge.com>wrote: > The exact route across the lake probably isn't a big deal for a canoe, but > for any watercraft requiring deeper water and/or moving at greater than > hand-paddled speed, it helps to know where the recommended channel is > located. > > > On March 25, 2014 12:39:21 AM CDT, Yves <yve...@gmail.com> wrote: > > Dave, you can connect with a straight way across the lake with no tag, > > but part of the relation. > > Yves > > > > On 25 mars 2014 01:39:33 UTC+01:00, Dave Swarthout > > <daveswarth...@gmail.com> wrote: > > >There is a definite need for a way to indicate a route that crosses > > an > > >open > > >body of water like a lake. I came across this issue when mapping a > > >"canoe > > >route" in Alaska recently. For such a route there are portions that > > are > > >footways, places where one carries the canoe from one lake to > > another, > > >these are called portages, and portions that go across the lake. > > >Currently > > >there is no way to tag the waterway portions but one can create a > > >relation > > >to handle them as part of a route. > > > > > >The route is the Swan Lake Canoe Trails: > > >http://www.openstreetmap.org/#map=15/60.6847/-150.6384 > > > > > >In the area shown the footway portions are clearly visible but the > > >water > > >portion, which divides in Spruce Lake, is not visible. I did not tag > > >those > > >waterway sections because I could not figure out how to do it short > > of > > >creating artificial "streams" through the lakes. > > > > > >Clearly, something needs to be done about this. Also, I am unable to > > >search > > >for this route in OSM. I'm not sure why that is but it's annoying. > > > > > >Cheers, > > > > > >Dave > > > > > > > > >On Tue, Mar 25, 2014 at 5:12 AM, fly <lowfligh...@googlemail.com> > > >wrote: > > > > > >> On 24.03.2014 22:11, Janko Mihelić wrote: > > >> > 2014-03-24 16:41 GMT+01:00 fly <lowfligh...@googlemail.com > > >> > <mailto:lowfligh...@googlemail.com>>: > > >> > > > >> > > > >> > I would use a type=waterway relation for the canal. > > >> > > > >> > > > >> > Seems good to me. > > >> > > > >> > > > >> > Yes, it won't but for proper routing you need to know the > > >waterway > > >> signs > > >> > and buoys. > > >> > > > >> > > > >> > But even with waterway signs and buoys you need routes. You can't > > >tag > > >> > maxdrought=* on a buoy. > > >> > > >> maxdraught is very special for waterways if not only for canals. In > > >> general maxheight, -width and waterdepth are the important factors. > > >> > > >> Right now your route (waterway) is quite long and some parts do not > > >have > > >> the restrictions at all. That is why I prefer it on the ways. > > >> > > >> > > >> cu fly > > >> > > >> _______________________________________________ > > >> Tagging mailing list > > >> Tagging@openstreetmap.org > > >> https://lists.openstreetmap.org/listinfo/tagging > > >> > > > > > > > > > > > >-- > > >Dave Swarthout > > >Homer, Alaska > > >Chiang Mai, Thailand > > >Travel Blog at http://dswarthout.blogspot.com > > > > > > > > >------------------------------------------------------------------------ > > > > > >_______________________________________________ > > >Tagging mailing list > > >Tagging@openstreetmap.org > > >https://lists.openstreetmap.org/listinfo/tagging > > -- > John F. Eldredge -- j...@jfeldredge.com > "Darkness cannot drive out darkness; only light can do that. Hate cannot > drive out hate; only love can do that." > Dr. Martin Luther King, Jr. > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging > -- Dave Swarthout Homer, Alaska Chiang Mai, Thailand Travel Blog at http://dswarthout.blogspot.com
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