On 3 March 2012 10:07, Vincent Pottier <[email protected]> wrote: > Le 03/03/2012 08:49, Erik Johansson a écrit : > >> There is nothing separating this road yet it is mapped as two ways: >> >> http://osm.org/go/0bCzcBhNM--?m >> http://goo.gl/KLTpu (Streetview) > > IMHO, it's a mistake. > >> >> This is done for routers. Imagine you want to go from the marker to >> number 117, as it is mapped today the router will know that you can't >> go back on the same street directly. How can this be mapped with out >> mapping this as two ways, as it's said in the Editing standards: >> >> >> http://wiki.openstreetmap.org/wiki/Editing_Standards_and_Conventions#Divided_highways >> > IMHO, there is a lack of a tag saying that the road can't be crossed, except > at crossings e.g. tag:crossable=no. > If it is forbiden to U-turn it at a cross, a restriction relation must tell > it, or maybe a different tag if all crossings are concerned, e.g. > tag:crossable=not_at_all.
There was a proposal like that https://wiki.openstreetmap.org/wiki/Proposed_features/Divider that has been abandoned. Not sure of the reason. I think that having separate ways for legally separated opposing lanes is the best scheme currently to represent the truth on the ground. Disclosure: I'm the one who mapped Hornsgatan as it is today. /Markus _______________________________________________ Tagging mailing list [email protected] http://lists.openstreetmap.org/listinfo/tagging
