Has anyone discussed the creation of a comprehensiveness or level of detail rating? What I mean by this is different from a quality rating or metric, as that is a very difficult task which entails comparison against "authoritative" sources or some other process, and different from the general definition of completeness which measures what percentage of real world objects of type X exist in the OSM database.
Right now I'm thinking about using a comprehensiveness rating in the process of going through all the state routes in Virginia, but this could apply to any road, and similar ratings could be created for hiking trails, waterways, POIs, etc. Here's a shot at a few levels, with a slight orientation towards routing, probably the most common use of road data: 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, two ways created (if divided), oneway=* Level 3: Access restrictions, max speed (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, ??? I'm sure I've missed some things, and have parts out of order, so please provide your feedback. I'm guessing this has been discussed in some form before, but I can't find it. Please point me to such discussions if you know of them! Regards, -Josh _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
