Nick, The problem you describe can be caused without the use of yahoo imagery or out of copyright maps. If someone surveyed a street in 2006 and it has since been made oneway, it will not be updated unless someone is keeping a close eye on changes made by local councils. If a country road is bitumenised, or a road is blocked for traffic management, or speed humps are installed, etc. etc.
Ideally all data would be derived from surveys and regularly re-surveyed, but until such time as OSM has amassed such a huge amount of manpower, old data is better than no data (to an extent.) I think you should reconsider your notion of a street being "complete." Perhaps instead of "has a name" we should define it as "has a name and has source=survey and has been updated in the past 6 months". Currently there is a large emphasis on naming streets (as shown by the noname layer, maplint, etc.) but once all streets have names, the focus will shift. Currently I do not know of any tools to highlight streets which do not have source=survey, but I imagine it would not be difficult to do so. ~Cameron 2009/1/18 Nick Hocking <[email protected]> > "Encouraging on a quality contol level" > > HI Darren, > > Please excuse me for taking your quote a bit out of context but.... > > My concern is if someone traces a road from Yahoo, and then it gets tagged > from a source other than the street signs > then the road is complete but has never been surveyed. > > Yahoo hi-res imagery is sometime over two years out of date and roads that > seem to be there are non existant. > Also these old directories don't appear to have any of the one way streets > in central Adelaide marked as such. > > Therefore once they are traced and tagged, thats it, they will remain > incorrect until someone using the Garmin > routable maps is directed up the wrong way. Then either that person will > sign up to OSM, just to fix this road or > more likely will just say, Well OSM's worse than Sensis or PSMA and go back > to the better maps. > > Morialta Street (near Victoria Square) appears to have already suffered > this fate. There are no public gps tracks > so I can only assume it has been traced. Google street view, google maps > and sensis mapping all indicate that > it is a one way road but to use this to add a oneway tag would > unfortunately be copyright infringement. > > It will be interesting to see what happens to its neighbour "Trades Hall > Lane". > > If necessary I'll try to survey all the one way streets in central > Adelaide, but I won't be able to do it till > Christmas, > > Gawler Place is marked as one way for part of its length but google street > view seems to indicate that it should > be one way right through to Grenfell rather than just Pirie. Next door > Wyatt is missing its oneway tag. > > I appears that I'm going to be busy this december, but hey, it was the lack > of marked one way streets (in Monterey California- Teleatlas mapping) > than really got me motivated to contribute to OSM so I'm more than happy to > drive down the very smallest one way roads that > I can find. (Gotta find a hire car with a really good turning circle !!) > > > > > > > > _______________________________________________ > Talk-au mailing list > [email protected] > http://lists.openstreetmap.org/listinfo/talk-au > >
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