On 2014-08-14 13:35, John Packer wrote : > One question. > How would people map a cave? It depends on your definition of "how" but this could be an answer <http://www.mondesauvage.be/grottes/fr/>. > As far as I know, GPSes don't really work underground, and obviously > there is no sattelite imagery for them. "routing" was obviously a free bonus, but please notice that you don't really need a GPS signal (or device) to follow a route drawn on a map. You don't even need to enter the cave if all you want is measure the length of one or several circuits. GPS lack is the problem of tracking the route.
> I imagine that's why there is no scheme right now. > > > > 2014-08-14 8:22 GMT-03:00 André Pirard <[email protected] > <mailto:[email protected]>>: > > On 2014-08-14 12:31, Martin Vonwald wrote : >> 2014-08-14 12:25 GMT+02:00 André Pirard <[email protected] >> <mailto:[email protected]>>: >> >> On 2014-08-14 11:08, Janko Mihelić wrote : >>> Well first, tunnel=yes is obviously wrong. We need to >>> replace this with cave=yes. Other than that, I have no >>> problems with this. If a cave has two cave entrances, then >>> information that they are connected by footpaths is valuable >>> information. >> Obviously? Regarding paths and waterways, especially ones >> fitted up for tourism, I wonder... >> >> >> Maybe not completely obvious, but I would agree with Janko. In my >> opinion, a "tunnel" is man-made, while a "cave" is not. > > "tunnel" is an attribute of an object called "highway", including > the paths in question. > "cave:NNN=*" are attributes of objects "natural > <http://wiki.openstreetmap.org/wiki/Key:natural>=cave_entrance" > <http://wiki.openstreetmap.org/wiki/Tag:natural%3Dcave_entrance>, > obviously speleology and not path oriented. > "cave=*" is not defined. > I know I still have to learn that OSM is fuzzy, but using > "cave=yes" for paths would first need a definition of it in the > "highway=*" page. > > This said, we could wait for years for a rendering of cave=yes, > let alone routing support. > Rendering and routing don't care if it's man-made or not. They > just work or don't. > Why not use the well established tunnel=yes and layer=-n? And > cope with the subjective, cultural, etc. strangeness with an > adorning cave or whatever made up tag? > > André. > >
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