Hi, On Tue, Jan 24, 2012 at 3:52 AM, <[email protected]> wrote: > Over the past couple of months, I have armchair-mapped several highway > junctions in the United States which are "commonly complex" in that they > involve multiple turn restrictions, street name changes and pedestrian > crossing placements. > > I would like to have some critique from someone experienced in mapping such > junctions so that I ensure I am following current best practice and am not > just creating a bunch of plates of unpalatable spaghetti. > > Two recent junctions are found in the following permalink views > * http://www.openstreetmap.org/?lat=40.095879&lon=-75.296179&zoom=18&layers=M > * http://www.openstreetmap.org/?lat=39.128273&lon=-77.237731&zoom=18&layers=M >
Although the effort to map these intersections in detail is commendable, I have to go with the previous responses in terms of mapping practices. But instead of just reverting stuff as was also suggested, I prefer to have a discussion here so we all learn something. So definitely bring your questions here or to the tagging list. On turn restrictions: the turn restriction relation indicates, as the name implies, restrictions on the directions you are allowed to turn. You seem to want to indicate the direction of a turn lane with them, which is not the appropriate use. In my view, there is a case to make for appropriately using turn restrictions in this type of situation: where connector lanes (_link) cross at level or join the main road, if and only if a turn restriction is not implied (because of one_way restrictions). See http://www.openstreetmap.org/?lat=40.782409&lon=-111.910731&zoom=18&layers=M for examples. Used like that, http://www.openstreetmap.org/browse/node/728096876 could do with a few. -- martijn van exel geospatial omnivore 1109 1st ave #2 salt lake city, ut 84103 801-550-5815 http://oegeo.wordpress.com _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk
