* Paul Johnson <ba...@ursamundi.org> [2013-11-05 09:18 -0600]: > On Tue, Nov 5, 2013 at 8:05 AM, Janko Mihelić <jan...@gmail.com> wrote: > > The problem is, some admin borders are supposed to be glued to roads or > > rivers, and they change when the flow of a road or river changes. How do > > you deal with that? > > Well, historically, the border doesn't move.
It depends. In some cases, it doesn't move. In other cases, if the course of the river changes gradually by natural means (i.e. not someone digging a new channel for it), the boundary is considered to move with it. There's also the consideration that people might improve OSM's river or road data over time. If a boundary is glued to a road, but that road is poorly-aligned in OSM, the user who improves its accuracy should be updating both the road and the boundary. Personally, I think that OSM's ball-of-mud approach to data is one of its strengths and separating out its data into layers would be more of a negative than dealing with all of the issues that come from mingling administrative boundaries with everything else. _______________________________________________ talk mailing list talk@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk
