[OSM-talk] Postmortem analysys

[Mike N.]

> After ungluing a node, move one of them just a little bit. (Unless you
> used a DGPS with a 10cm resolution and found that the centerlines are
> in fact on top of each other). If you leave them on top of each other,
> it's going to waste someone's time later on (either after a bot edit,
> a keepright warning, a routing error or a user editing the area who is
> completely oblivious to the possibility that two nodes can be on top
> of each other).

  Agreed - my preferred method is just to delete intersection nodes and 
realign if necessary.   That only fails if 2 ways also join at the 
intersection node.

>We have had to revert about 300 changesets from someone who glued nodes
>with different ele values on survey marks.

  I'm not familiar with how survey marks are used - are there multiple marks 
at the same lat/lon but different ele?