On Thu, Mar 22, 2012 at 8:04 AM, Marc Zoss <[email protected]> wrote:
> I briefly downloaded all sby:bldgtype-tagged ways and relation of Maryland 
> through the overpass-api. Then removed the ones having only a sby:bldgtype 
> tag, run the validator and deleted the duplicated nodes and ways.
> This would result in a changeset to remove the roughly 71'000 duplicates 
> nodes and ways.
>
> If the area was edited since the import and reverting gets tricky, this might 
> be the option to go, at least the result looks ok at the first glance.
>
> Please also note that the conversion step seems to add a building=yes tag on 
> on inner ring of building polygons () which is certainly bad tagging, despite 
> the correct rendering (52 occurrences, so could be fixed manually).

Thanks for doing that, as that was the next step I was going to try. I
posted some regarding the changesets here:
http://wiki.openstreetmap.org/wiki/User_talk:Nick_SPW#Salisbury.2C_Maryland_import

I think perhaps we should revert a subset of the changesets, such as
the dangling nodes, and then use your method to handle the rest.

-Josh

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