Just a comment locally someone did a trace and managed to get one end of the road about 100 meters out and connected at the wrong road junction. Took me a while to sort it out.
Cheerio John On 19 December 2010 19:18, <j...@jfeldredge.com> wrote: > OK, but there will likely be additional details available from visiting the > site in person that you wouldn't be able to detect from an aerial view, plus > you would be able to tell if the road had been modified since the aerial > photo had been taken. > > -------Original Email------- > Subject :Re: [OSM-talk] Bing maps is misplaced > From :mailto:sea...@gmail.com > Date :Sun Dec 19 18:00:21 America/Chicago 2010 > > > For *that* particular imagery, yes. > > My point is that blindly saying that you shouldn't trace from imagery > if you haven't visited the place is not a hard rule. There are a lot > of circumstances when tracing is actually OK. > > > On Mon, Dec 20, 2010 at 3:19 AM, John F. Eldredge <j...@jfeldredge.com> > wrote: > > So, you are saying that you feel OpenStreetMap should reflect the status > of the road when the aerial photo was made, rather than the current status? > > > > -------Original Email------- > > Subject :Re: [OSM-talk] Bing maps is misplaced > > From :mailto:sea...@gmail.com > > Date :Sun Dec 19 10:17:51 America/Chicago 2010 > > > > > > On Sun, Dec 19, 2010 at 8:04 PM, M∡rtin Koppenhoefer > > <dieterdre...@gmail.com> wrote: > >> 2010/12/15 Steve Bennett <stevag...@gmail.com>: > >>> I'm sorry, but no. This is not common practice, nor is it desirable. > >>> Could we please not give advice which only reflects personal > >>> preferences? > >>> > >>> Fwiw, highway=road is for when you know *nothing* about a road. Can > >>> you tell me, hand on heart, that you would not tag this road: > >>> > >>> http://www.nearmap.com/?ll=-38.107325,145.15275&z=20&t=k&nmd=20101020 > >>> > >>> as highway=residential, maxspeed=50, surface=paved, lanes=2? > >> > >> > >> If I knew the road I would surely do it. For the_point_ you linked > >> to, it seems correct (the maxspeed at least for one direction), but I > >> still would have to guess, that this maxspeed is valid for the other > >> direction as well (probably yes, but you cannot be sure) and that it > >> is valid for the whole road. > > > > If I was a tourist and I went to that particular spot and saw that > > "50" on the ground, I still wouldn't know if the speed limit is just > > for one direction or both and if it applies to the whole road. So even > > if I were on the ground, my information would not be much better than > > if I traced from that particular aerial imagery. > > > >> Don't know if it is a residential street either (could be unclassified > >> or tertiary). Of course you don't know for other restrictions (e.g. > >> weight, but also access=destination, ...). You can be quite sure for > >> the information you provided above, but still you don't know if some > >> important information (like access=destination) that you surely would > >> insert if you had visited the place, is missing. > > > > OSM's a wiki, so other people can add those details. There's no need > > to have everything topnotch on the first edit. Otherwise we'd have a > > pretty blank map. > > > >> This discussion is simply about the quality level: are you satisfied > >> with probable information derived from an aerial photo depicting the > >> situation some years ago, or do you want to insert only information > >> you verified on the ground and you can guarantee for? > > > > For aerial imagery that is of a high resolution and recency as > > Nearmap's, I would rather trust an Australian to trace and add data > > from that imagery even if he/she has not been to the place than if I > > were to actually visit that place and add details from on the ground. > > > >_______________________________________________ > > talk mailing list > > talk@openstreetmap.org > > http://lists.openstreetmap.org/listinfo/talk > > > > -- > > John F. Eldredge -- j...@jfeldredge.com > > "Reserve your right to think, for even to think wrongly is better than > not to think at all." -- Hypatia of Alexandria > >_______________________________________________ > > talk mailing list > > talk@openstreetmap.org > > http://lists.openstreetmap.org/listinfo/talk > > > > > > -- > http://vaes9.codedgraphic.com > > -- > John F. Eldredge -- j...@jfeldredge.com > "Reserve your right to think, for even to think wrongly > is better than not to think at all." -- Hypatia of Alexandria > _______________________________________________ > talk mailing list > talk@openstreetmap.org > http://lists.openstreetmap.org/listinfo/talk >
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