13 Oct
2009
13 Oct
'09
1:11 p.m.
It is not that hard to fix duplicate nodes. In JOSM, find them with the Validator plugin. Double-click a duplicate node warning in the validator error list and hit 3 to center the map at the nodes, so that you can check what to do. Then hit M to merge the nodes, unless it is something else (tunnel or bridge needed, for instance).
Validator plugin comes up with lots of false positives (like duplicated nodes one in a way and the other one in a city/county boundary) and is about useless for that purpose in the US. N.