>in the ID editor, if you draw a stream - river line, and it crosses a road, >you get a warning, with the suggestion > >add a bridge or tunnel. > >>Monday, June 8, 2020 5:13 AM -05:00 from Martin Koppenhoefer < >>[email protected] >: >> >>Am Sa., 6. Juni 2020 um 18:02 Uhr schrieb Dave F via talk < >>[email protected] >: >>>Do you have an example? >>> >> >> >>A simple example for a tunnel (here subway) on a bridge would be this: >>https://www.openstreetmap.org/way/757824513 >>https://fr.wikipedia.org/wiki/Pont_Morand >> >> >> >>>Whether it's a bridge or tunnel is fairly easily defined by determining >>>which is taking the load. >>>If a tunnel's structure was removed, would whitewater's above it >>>collapse? If 'yes' then it's a tunnel. >> >> >> >>what I wrote was that - according to some technical definitions - a tunnel >>must not have something above it, it may be sufficient that it is closed and >>long enough. I am not sure if we share these definitions in OSM. >>According to the current wiki, "a tunnel is an underground passage for a road >>or similar." and also: " tunnel =* is used for roads, railway line, canals >>etc that run underground (in tunnel ). " This doesn't appear to be >>exhaustive / complete, tunnels could also run underwater, above ground and >>potentially in the future even in space, no? >>Many current underwater tunnels are also "underground", as they are often >>running in a man made structure (embankment like) on the ground or below the >>water body/river in the ground >> >> >> >>Cheers >>Martin >> >> >>_______________________________________________ >>talk mailing list >>[email protected] >>https://lists.openstreetmap.org/listinfo/talk > > > >
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