Right. As Martin, said, while we shouldn't mistag for a better rendering, it would be great if our tagging would at least make it possible to have a consistent rendering.
Rather than using highway=trunk to define a autovia, motorroad or expressway with a certain maxspeed=, lanes=, or surface quality, I believe it is better to either 1) follow the national classification system, when this is logical and internally consistent, or 2) use network relationships and to assign a classification for a complete road route between towns. Changing the classification from trunk to primary to trunk again, in the middle of a rural area, breaks the network. Certainly mappers should also tag maxspeed=, lanes=, surface=, and should map divided highways as 2 separate ways, and grade-separated intersections with bridge= and tunnel= + layer= so that routers will recognize faster routes. I'm also in favor of using motorroad=yes and expressway=yes (Actually, I think these mean nearly the same thing?) in Europe and in the USA respectively, to define "autovias", "motorroads" and "expressways" specifically. But I don't think it's a good idea if highway=trunk is only limited to segments of expressway or motorroad, because this leads to an incomplete network, as in France. It would be nice if you could just render all highway=primary along with trunk, but in France this still leads to smaller gaps where primary roads suddenly end. If each country could develop internally consistent highway classes that show the network consistently, at some scale, this would help renders and map users. -Joseph On 8/13/19, Martin Koppenhoefer <[email protected]> wrote: > > > sent from a phone > >> On 13. Aug 2019, at 02:21, Warin <[email protected]> wrote: >> >> I think your confusing tagging with rendering. >> >> Tagging is what is on the ground. >> The road from Toulouse toward Lyon may physically change between the two, >> so the tagging follows that (I don't think so but as an example?). > > > I believe the issue is that in a proper network you would expect not to find > gaps at specific zoom levels, when there are actually connections in reality > (those should show up at the same time (zoom), or not, if you want to make a > nice network map). > > If classes like motorway or trunk are bound to legal or physical > characteristics rather than only a hierarchical network, and aren’t > “complete” from a network aspect, you will get the gaps. > > > Cheers Martin > _______________________________________________ > Tagging mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/tagging > _______________________________________________ Tagging mailing list [email protected] https://lists.openstreetmap.org/listinfo/tagging
