-1 A renderer/router is perfectly capable of deciding what he thinks is paved/unpaved. He can decide whether he calls gravel / fine_gravel paved or unpaved. Do not leave the decision paved/unpaved up to the mapper. Map what you see. As you may have guessed I prefer surface=asphalt over surface=paved since the last one could mean that it is gravel.
Cheers PeeWee32 2014-09-21 2:49 GMT+02:00 David Bannon <dban...@internode.on.net>: > > yes, agree strongly. Surface= is a good tag, provides important info but > it is far too fine grained. Someone setting up a route cannot be > expected to sift through all the possible values. > > Similarly, we may well have a chance to get the renderers to respect a > clear, on/off tag like the proposed and show it on the maps too. > > I see no problem with both tags being used. > > I think sometimes we put too much detail in the database and risk making > the data unusable because of that. Mention making the data usable, we > see charges of "tagging for the renderer". But this is important, I have > detailed life threatening issues resulting from unclear maps. This > proposal will provide valuable, dare I say "usable" info for consumers ! > > David > > On Sat, 2014-09-20 at 23:42 +0200, Tomasz Kaźmierczak wrote: > > Hello all, > > > > I've posted the below message on the forum, and have been directed > > from there to this mailing list, thus re-posting it. > > > > Idea > > > > I would like to suggest making the paved key for highways (and > > probably other types of elements) official. Taginfo for paved: > > http://taginfo.openstreetmap.org/keys/paved#values > > > > The above shows that the key is already being used, but the Wiki > > doesn't describe this key, instead redirecting Key:paved to the > > article about Key:surface. > > > > Rationale > > > > Currently, the surface key is being used as a way of saying that a > > given highway is paved or unpaved, but often the value for the surface > > key is not a generic paved or unpaved, but a specific surface type is > > given.This is of course very useful for describing the particular > > surface type a given highway has. However, in some cases, a simple > > information on just whether a highway is paved or not, would be very > > useful. One such case would be navigation software – if a user chooses > > to avoid unpaved roads, the software can check the value of the > > surface key, but in practice most (all?) of the navigation software > > only checks for a subset of all the possible values the surface key > > can have. This leads to incorrect (in terms of what the user expects) > > navigation when, for example, the surface is set to some value that > > describes an unpaved road, not recognized by the navigation software – > > if the software assumes that all highways are paved, unless explicitly > > stated otherwise (by recognized values of known keys), then, in > > consequence, it assumes that the road in question is paved. > > > > If the paved key was widely used, then the navigation software would > > have a simple and clear way of checking whether a given road is paved > > or not. The default value of the paved key for highways could be yes, > > so that it would be consistent with the assumption that highways in > > general are paved. > > > > I don't mean that we should stop using the paved and unpaved values > > for the surface key – I'm sure those generic values are useful in some > > cases. However, using the paved key would be also very useful. Also, > > the surface=paved could also implicate paved=yes and similarly > > surface=unpaved could implicate paved=no, so that duplication of the > > information could be avoided when the generic paved and unpaved values > > are set for the surface key. > > > > I believe that adding an article for the paved key to the Wiki would > > encourage people to use this tag, and navigation software makers to > > implement support for it in their applications. > > > > What do you think about that? > > > > > > > > Regards, > > > > Tomek > > > > _______________________________________________ > > Tagging mailing list > > Tagging@openstreetmap.org > > https://lists.openstreetmap.org/listinfo/tagging > > > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging > -- Verbeter de wereld. Word mapper voor Openstreetmap <http://www.openstreetmap.org>.
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