Hi Paul, These are good points, but it does not look like the `junction:ref` tagging scheme is very common. Till there is widespread usage by the community we will continue to follow the conventional tagging of the reference numbers on the motorway_junction node [1].
Curious to know what the others think of the `junction:ref` tag. Cheers, Jinal Foflia [1] http://taginfo.openstreetmap.org/search?q=highway%3Dmotorway_junction On Tue, May 3, 2016 at 3:49 PM, Paul Johnson <ba...@ursamundi.org> wrote: > I'm wondering why the push to tag a node with directional information when > tagging the first segment of the diverging way would be more concise and > already had support in some navigational data consumers? This handles > weird situations where ramps diverge to the left or from a lane other than > the edge much more cleanly. > > For example, Exit 2 in West Tulsa on I 244. First segment could be tagged > as... > > name=Okmulgee Beeline > junction:ref=2 > destination=Okmulgee > destination:ref=US 75 South > ref=US 75 > highway=motorway > > Or, the number 3 lane exit westbound US 26 north of Beaverton at exit 71A > (lanes 1, 2 and 4 remain on US 26, oddly enough). > > name=Canyon Road > highway=motorway_link > ref=OR 8 > junction:ref=71A > destination=Beaverton > destination:ref=OR 8 West > > This along with the departure angle, gives navigation systems ample > information to accurately describe the ramp that point data just leaves out. > > > On Tue, May 3, 2016 at 4:46 AM, Jinal Foflia <fofliaji...@gmail.com> > wrote: > >> There has been a recent push to improve the coverage of exit numbers and >> destination signs on the motorways in the US by the data team at Mapbox. >> Some context here [1][2][3][4]. The primary sources of data were DoT >> documents and Mapillary images. The secondary source was Wikipedia, but as >> per the conversation with the local mappers, it is not a good idea to >> completely trust wikipedia documents for mapping the exit numbers and >> destinations. There are certain highways which do not have Mapillary >> coverage and it is difficult to validate/identify the missing exit numbers >> and destination. It will be a great help if local mappers can help share >> reliable sources and validate the existing data that will help improve the >> coverage of this data on the map >> >> We been working on this from the beginning of April and reviewed more >> than 220 highways in 9 states. The goal would be to authenticate all the >> existing data and fill in the gaps using verifiable sources wherever >> possible. >> >> Here is the Overpass query to get a better sense of the stats: >> >> * Total motorway_junction edited by team in last two weeks: 179 [5] >> >> This is the detailed workflow for *Exit mapping* [6] and *Destination >> mapping* [7] that was used for this mapping activity. Would be great to >> hear your feedback on how it can be improved for further such tasks, please >> drop a comment on the *project tracker* [3] . >> >> I want to thank all of you in the community for giving feedback, calling >> us out on the occasional errors, and working with us to improve signpost >> mapping conventions. I feel proud to be a member of such a great mapping >> community! >> Cheers, >> >> Jinal Foflia >> >> [1] https://www.openstreetmap.org/user/jinalfoflia/diary/38501 >> >> [2] https://www.openstreetmap.org/user/jinalfoflia/diary/38342 >> >> [3] https://github.com/mapbox/mapping/issues/178 >> >> [4] https://github.com/mapbox/mapping/issues/169 >> >> [5] http://overpass-turbo.eu/s/fzA >> >> [6] >> https://gist.github.com/poornibadrinath/a8f3652deb566d95b848c5e9cd68011f >> >> [7] >> https://gist.github.com/poornibadrinath/f982a947c6a063ed1a9016a2d3246d4a >> >> >> >> >> _______________________________________________ >> Talk-us mailing list >> Talk-us@openstreetmap.org >> https://lists.openstreetmap.org/listinfo/talk-us >> >> > > _______________________________________________ > Talk-us mailing list > Talk-us@openstreetmap.org > https://lists.openstreetmap.org/listinfo/talk-us > >
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