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
