2010/8/30 Steve Bennett <[email protected]>: > Yep. Polygon collisions can also be accidental, like when two objects > from slightly different sources (say one gps, one aerial imagery) are > near each other.
I'd consider this mapping failure actually. More than believing in gps- and imagery-precision the mapper should care about topology. > > Other generic relation types that would be very useful: > - "these objects are mutually accessible by foot" (to avoid having to > invent artificial foot paths in order to get good routing) you can do this with the area-relation (not restricted but restrictable to foot) > - "these objects express the same thing as that object but in more > detail" (eg, one line representing a pair or more of train lines) interesting, but maybe difficult to do. > - "these objects are one" (like a very generic multipolygon, could > also work to form "multiways") can't you already do this with current multipolygons? (OK, only for areas, for ways there are routes). cheers, Martin _______________________________________________ Tagging mailing list [email protected] http://lists.openstreetmap.org/listinfo/tagging
