Shaun McDonald schrieb: > > On 14 Jul 2009, at 09:50, Ulf Lamping wrote: > >> Tom Hughes schrieb: >> >>> because in general terms it won't work - reverting >>> will often need manual intervention to resolve conflicts. >> >> I've heard this argument many times before, but no prove that it is >> actually true. Why not do it the osm way, implement it the simplest >> possible way and see how far we get? > > People who have reverted stuff in the past have already come across the > conflicts. This is especially true when you have someone who has tried > to fix the problem manually before asking for help.
True. But: IMHO we would probably have a lot less of those manual fixes, when there would be an easier way to "repair stuff" like a revert button. A normal mapper currently simply don't have a lot of other options to repair stuff than to try to do it manually :-) > As soon as someone has edited anything in the changeset after the > version in the changeset, then you have a conflict and can't do a simple > one click revert. OpenStreetMap data is a *lot* more complex than the > Wikipedia when it comes to reverting due to the referential integrity. > That is key to there not being a simple revert system for whole changesets. Yes, I'm aware of that. However, the question is how often will this actually happen if someone wants to revert stuff - IMO this is only rarely the case for the time period where a revert is really interesting. >> If the edit can't be reverted because of conflicts, simply show a: >> "can't revert because of editing conflicts" message. >> >> I guess this would already solve 99.99% of all cases. > > Only in the seconds/hours after the edit was made (depending on how > active the mappers in the area are). The further back in time you go the > more conflicts you get and the harder it is. Yes, the revert will probably only be possible in the few hours / days after the changeset was done. I don't expect a changeset done three months ago to be actually revertable - probably a good thing in that case ;-) Regards, ULFL _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
