Level of detail

It would be useful to create a level of detail rating to indicate how thoroughly or comprehensively a given feature has been mapped. Different rating systems would be created for each feature, one for roads, another for trails, POIs, etc.

Roadways

A possible rating system for purposes of starting discussion:

• Level 0
  • Road way present and connected to other ways, and tagged at least with highway=road if classification is unknown
• Level 1
  • name=* and classification (e.g. highway=secondary)
• Level 2
  • Route number (ref=*), two ways created (if divided), oneway=*
• Level 3
  • access=* restrictions, maxspeed=* (if warranted, type=route+route=road relation created to tie ways of a numbered/named route together)
• Level 4
  • Turn restrictions, intersections in the form of highway=crossing, highway=traffic_signals, highway=motorway_junction, etc.
• Level 5
  • Bridges and tunnels, surface=*
• Level n?
  • Junction relations to tie signals/crossings together, turn lanes added, ???

Discussions

• Comprehensiveness or level of detail rating - inquiry on the talk mailing list

See also

• Philippines/Geodata detail levels - describes an overall LoD rating for a region, but not as detailed