Hey all, I believe the way-junction:ref should be used in addition to the node-ref only when needed at splits - like this example: http://wiki.openstreetmap.org/wiki/Exit_Info#A.2FB_Split_Example These types of splits do not happen very often - however, when they do - having the way-junction:ref helps to improve the guidance for the user at key decision points.
Regards, Duane On Tue, May 3, 2016 at 10:02 AM, Jinal Foflia <fofliaji...@gmail.com> wrote: > 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 >> >> > > _______________________________________________ > 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