2011/5/3 M∡rtin Koppenhoefer <dieterdre...@gmail.com>: > You seem to imply that relations are faster / less manual work > requiring when entering addresses manually with one of the OSM > editors, but from my own experience they require at least the same > (manual) work, if not more.
Creating relation could be same, or even more extra work, this is correct (but fixable in editor level). Point of avoiding redundancy (normalization) is to make maintenance easier in long run. How much manual work do you need to do if any of the underlying object is modified: street names change now and then, sometimes whole administrative system is reformed and even Europe has countries added or merged every decade. OSM database is more or less fully topologically clean (in geometry terms) and this is something what I really admire from my GIS background. Any duplicate node is error. It would make sense to follow same pattern for tags also: invalidate duplicate tag values. At least in long run. With implicit (polygon-derived) spatial relations there is no need for enduser to maintain most of the the relations: just make sure that the region polygon is complete. With explicit relation you can always override spatial relations, this would enable to cover also the "city address outside of city polygon" case. -- Jaak _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
