OpenStreetMap

The data team at Mapbox has been trying out mapping missing motorway exit numbers in the US. Based on the density of Mapillary street photographs, the following 9 US states were chosen to improve:

  • California
  • Florida
  • New Jersey
  • Maryland + DC
  • Pennsylvania
  • Washington State
  • Colorado
  • Texas
  • Illinois

We used the checkautopista2 tool which made it very easy to detect exits that lack a ref tag. In summary we found most of these exits to have no official exit number and added the noref=yes tag when we could confirm it on official documents or on Mapillary photographs.

exit These are the exit numbers added by the team. The pink dots represent ref=* tags and the blue dots represnt noref=yes tags added by the team, click here to view the full map

The team has been working on this from 31 March 2016 to 14th April 2016 and reviewed more than 220 highways.

  • Number of ref=* added by team on nodes highway=motorway_junction are 63
  • Number of noref=yes added by team on nodes highway=motorway_junction are 219

This is the workflow 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 here or on the project tracker.

Happy Mapping!

Comment from Glassman on 22 April 2016 at 15:17

Thanks for adding the ref numbers but I’m curious about the noref=yes. Is noref documented in the wiki?

Comment from jinalfoflia on 25 April 2016 at 08:17

@Glassman there is no wiki for noref=yes but this tag has being used 4 458 times and this is present in tag info - http://taginfo.openstreetmap.org/keys/noref#overview

Comment from rickmastfan67 on 27 April 2016 at 14:12

I would recommend talking about this on [talk-us] as well. Gets more eyes on it. Most US users don’t see these diary entries.

Comment from jinalfoflia on 28 April 2016 at 06:07

I would recommend talking about this on [talk-us] as well. Gets more eyes on it. Most US users don’t see these diary entries.

@rickmastfan67 makes sense, will post this in the [talk-us] mailing list. Thank you!


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