"a pass was simply a saddle that was a convenient route for travel."
Yes, usually. But not all passes are saddles. A saddle is a specific topographical feature: the lowest point on the ridge line between two higher areas. It's also called a "col" (from French), especially in the Alps. Like a peak, a saddle is a single point. A pass is any "navigable route through a mountain range or over a ridge", so it's always a point on a path or road: https://wiki.openstreetmap.org/wiki/Tag:mountain_pass=yes Often the location of the pass on the highway is a few meters away from the exact point of the saddle, for example, if the road has to curve while crossing the ridgeline. Other times there are named passes which cross a ridge at a fairly high point, far away from a saddle. "Be aware that highways don't always go exactly through the saddle point, so that the highest point on the highway and the saddle point can have different positions." So a mountain pass is any place where a road or path passes over a ridge, whether at a saddle or not On 5/1/19, Tod Fitch <[email protected]> wrote: > >> On Apr 30, 2019, at 9:28 PM, Warin <[email protected]> wrote: >> >> Depends? >> >> Warning - my interpretation! >> >> SADDLE = low point between two high points (mountains), it does not >> descend near the level of the adjacent valleys. >> >> PASS =A gap in a range of mountains or hills permitting easier passage >> from one side to the other, it descends near the level of the adjacent >> valleys. >> >> This gives me a difference between 'pass' and 'saddle',otherwise they >> appear to be the same? >> >> >> If it were a 'pass' then that would make the range into two separate >> ways. >> If it is a saddle then it does not break the range, but forms part of it. >> >> Some mountain ranges do not have crest along their entire length .. yet >> they are a mountain range along the entire length. >> > > Hmmm. Then many of the passes, including Donner Pass and Tioga Pass, in > California’s Sierra Nevada are actually saddles? > > I’ve assumed that a pass was simply a saddle that was a convenient route for > travel. > > Looking at > https://www.vividmaps.com/2018/11/gap-vs-pass-vs-notch-vs-saddle.html > <https://www.vividmaps.com/2018/11/gap-vs-pass-vs-notch-vs-saddle.html> > maybe the difference between pass, saddle, gap and passage - at least in the > US - is mostly a difference in regional dialect. In which case I guess OSM > can do its usual and try to formalize the use and definition of one that > most closely matches UK usage. > > > _______________________________________________ Tagging mailing list [email protected] https://lists.openstreetmap.org/listinfo/tagging
