>I think the existing advice is correct. highway=road is supposed to mean "I'm not sure what the classification is".
Some routers ignore it? Yes that is a problem. At best they should rank it quite low. Outright *ignoring* the road seems like a bug. However don't tag for the renderer! Yes, it's a annoying when JOSM etc flag that as a validation problem. The solution is more mapping. A possible source of confusion could be the name "unclassified". In the UK (where OSM started), "unclassified" is a road classification. Saying "unclassified" doesn't mean the road is unclassified! To me the problem is the sheer quantity of highways so tagged especially bridges. Perhaps a note in the instructions saying the most common tag? Or since we are mapping from imagery and the African Highway wiki specifically says it is not possible to determine a highway's importance from its appearance ie some quite major highways are little more than tracks sometimes just give advice to map the highway as whatever and let someone else sort out its importance? But at least choosing a default such as unclassified that will route with all routers. I am aware that many routers will allow you to adjust which highways they will run on. Cheerio John On 24 February 2017 at 04:11, Rory McCann <r...@technomancy.org> wrote: > On 22/02/17 23:42, john whelan wrote: > > Currently there are HOT projects that include in the instructions the > words > > > > "If you are unsure of what tag to assign to a road, use the provisional > > highway=road tag." > > > > Yes but many routing systems ignore this these. When we mapped with GPS > > traces we used highway=road because you didn't know if it was a motorway > > or a footway with steps and that's why many routing systems ignore them > > and JOSM validation flags them. > > > > I would suggest if in doubt use highway=unclassified for instructions. > > > > Does anyone else have any thoughts on this? > > I think the existing advice is correct. highway=road is supposed to mean > "I'm not sure what the classification is". > > Some routers ignore it? Yes that is a problem. At best they should rank > it quite low. Outright *ignoring* the road seems like a bug. However > don't tag for the renderer! > > Yes, it's a annoying when JOSM etc flag that as a validation problem. > The solution is more mapping. > > A possible source of confusion could be the name "unclassified". In the > UK (where OSM started), "unclassified" is a road classification. Saying > "unclassified" doesn't mean the road is unclassified! > > > _______________________________________________ > HOT mailing list > HOT@openstreetmap.org > https://lists.openstreetmap.org/listinfo/hot > >
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