On Fri, Sep 25, 2009 at 12:21 PM, Lennard <l...@xs4all.nl> wrote: > Dave F. wrote: > >>> Personally, I don't think these should be rendered on the main maps, >> osmarender:renderRef is a tag to prevent rendering. > > I said 'maps', plural. One renderer's trick of not showing certain > features is certainly the wrong approach to this. > >>> and they should not be made up by us if there is no real ref on the ground. >> Would they not be essential for routing software? > > Why would you think that made up refs would be? Why would you even think > that refs would be essential at all for routing? The only thing they are > good for in the router is to give the driver better instructions. > > "Take the next exit, and follow the A29" > > Now, if I'm on currently not on the A29, and I get this instruction, > what is unclear about that? I see an exit coming up, probably even > reinforced with signs pointing out that that is the direction to take > for the A29. Clear and to the point. > > "Take the next exit, follow the slip road A58-A29*, then follow the A29". > > Exactly how would this be better? "A58-A29" won't be on signs, and it > tells me non-essential information that could confuse me.
Plus it's actually wrong. You'd hope, as Richard said, that the router had more local knowledge than that and could happily work out how a slip road between blahX and blahY should be referred to if it doesn't have a ref. If it does have a ref then the router is likely to assume you knew better (ie: as was also mentioned earlier the slip roads have specific refs), and if you didn't know better then it's just pointless bad data ruining a perfectly good router. Dave _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
