On Wed, Jul 6, 2011 at 7:14 PM, Dave F. <[email protected]> wrote: > On 06/07/2011 21:04, Anthony wrote: >> >> On Wed, Jul 6, 2011 at 3:57 PM, Frederik Ramm<[email protected]> wrote: >>> >>> Dave F. wrote: >>>> >>>> If one of these gets moved then the whole way gets updated, >>> >>> No. >> >> Substantively, that is what happens, but technically, in the database, >> it is not. >> >> In the database, we go from: >> >> <way id=1><nd id=8><nd id=9><nd id=10></way> >> <node id=8 lat=82 lon=18 /> >> <node id=9 lat=81 lon=18 /> >> <node id=10 lat=81 lon=17 /> >> >> to: >> >> <way id=1><nd id=8><nd id=9><nd id=10></way> >> <node id=8 lat=81 lon=17 /> >> <node id=9 lat=80 lon=17 /> >> <node id=10 lat=80 lon=16 /> >> >> Of course, I think that obviously this: >> <node id=8 lat=81 lon=17 /> >> <node id=9 lat=80 lon=17 /> >> <node id=10 lat=80 lon=16 /> >> >> is a derivative of this: >> <way id=1><nd id=8><nd id=9><nd id=10></way> >> <node id=8 lat=82 lon=18 /> >> <node id=9 lat=81 lon=18 /> >> <node id=10 lat=81 lon=17 /> >> >> (assuming a way with, say, 1000 nodes rather than 3...where between 3 >> and 1000 you can stop, well, that's a different question) > > Well, I learn something new every day. > > This explains a lot - as to why entities keep moving but there's no record > of it. > > Can someone please explain the logic of not recording major changes in the > database such as shifting an entity?
I suggest you ask that question on the dev list. _______________________________________________ dev mailing list [email protected] http://lists.openstreetmap.org/listinfo/dev
