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I've been adding a large city grid using Potlach and Yahoo Aerial
imagery. Nearly every road is perfectly straight from end to end, so
I've been only adding the ends, and leaving the middles unconnected,
knowing that I can go back in JOSM, validate, find crossing ways, and
join them without moving them. Except that I can't join them without
moving them - all the perfectly straight grid aligned roads are now a
bit wonky. There has to be a better way.

Ideally, I'd like to tag all the intersections as floating, meaning that
there position is not important, their true position is determined by
the intersection of the ways they are part of. Editors could notice
this, and when I drag a node at the end of a way, all the intermediate
floating nodes positions would be recalculated. If I drag a floating
node it would be untagged automatically.

What do other people think of this idea? Would a tag "floating=yes" on
nodes be a good way to impliment it? Does someone have the ability to
write a tool to realign all floating nodes?

Thanks,

Robert (Jamie) Munro
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