Nick Hocking <nick.hock...@...> writes: > Good tracing is quite helpful in the final definition of a way, > > Bad tracing is really bad - it takes a multiple of the original effort to correct it. > > Ok - having resolved that, I believe that the difference between good mapping and bad > mapping will be absolutely correlated to the number of "one way" errors and "turn restriction" errors. > > > In order to say that a route from Street A to Street B is possible you must have actually done it yourself. > It's not good enough to have just passed along a nearby cross street, to snaffle the street sign name. > > For entitys that need to be routable, you *must* actually travel that route to verify it's correctness. > > PS - you can't read a "No Right Turn" sign from a satellite and you're not allowed to use Google Steet Views.
Hi Nick, I don't have a GPS yet, so I'm a tracer. I think I've been fairly productive in OSM (see http://bluemm.blogspot.com/2008/10/first-update-on-mapping-openstreetmap.html on my workflow practises). Recently, I haven't been doing much tracing, preferring to go out there and take notes down on POI's/surfaces/stop signs/postboxes etc. on a printed out map. It has been mentioned on the Talk mailing list, but we probably need some kind of survey_visited=2009-01-15 tag to indicate when someone last went down the road and verified all the tags/POI's. I am kind of doing it now by using source:name=survey but that is only for when I have seen the street sign at intersections. Some way of indicating that I went down this road and noted/verified all the OSM data would be great. Also, accurate routing has to be a goal, but it's a lot of effort needed to get there. Obviously a printable map will come before that, and probably is more important for OSM to win hearts & minds. Tracing vs GPS tracks from a car doing 60kmh+ will get us nice maps, but not useful routing data. I think of it as stages or levels of completeness. BlueMM _______________________________________________ Talk-au mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk-au
