[OSM-newbies] Finding duplicate node points near other nodes of the same type?

[Stewart C. Russell]

Hi,

This would be a fairly easy query in a GIS, but it seems rather more
difficult using OSM tools.

By accident, I added some duplicate nodes (with k="generator:source",
v="wind") in the middle of a large wind farm. Someone had already
entered a few turbines from Bing, and I didn't see them in my JOSM edit
run. Now there are approximately 10 duplicate turbines in this 110
turbine project.

A couple of the turbines I added are far enough away that you can make
out two distinct node icons. Others are so close that you might catch a
hint of an overlapping icon. All of them are likely within 50m of the
duplicate. As a rule of thumb, wind turbines are very seldom placed
closer than 3x their diameters, which is around 240 m for these turbines.

I don't want to wipe the whole changeset, as that would remove most of
the project, and my tagging is a bit more detailed than the existing
nodes. Is there a way to select/highlight nodes with similar key/value
pairs that closer than X metres from one another?

cheers,
 Stewart