[Tagging] convert imported natural=rock areas to bare_rock

[Friedrich Volkmann]

My proposal
http://wiki.openstreetmap.org/wiki/Proposed_features/natural%3Drock_cleanup
has been in RFC state for a year, and the only comment from other users was
a personal message concerning the licence of my photos. So it seems that
there are no objections, and that we should proceed to voting. However, I
feel uncomfortable about the cleanup chapter, because it's about nebulous
subsequent edits on an unknown amount of data. Therefore I would like to
make some cleanups beforehand, and then see what is left.

I would like to start with data from the French Corine Land Cover import,
because *all* the natural=rock generated by that import actually mean
natural=bare_rock. Renaming these tags cannot do any harm, because an
ambiguous tag is replaced which an anambiguous and approved tag which
perfectly matches the intended meaning.

In detail, it's about:
- replacing natural=rock with natural=bare_rock
- for all areas (ways, MPs) with source="Union européenne - SOeS, CORINE
Land Cover, 2006."

The data can be retrieved with:
http://overpass-api.de/api/xapi?*[natural=rock][source=Union
europ\xc3\xa9enne - SOeS, CORINE Land Cover, 2006.]

There are 1216 objects to change.

Is this subject to the mechanical edit policy? If so, where should it be
discussed? What user account shall be used? Are there any reasons not to do
it at all?

-- 
Friedrich K. Volkmann       http://www.volki.at/
Adr.: Davidgasse 76-80/14/10, 1100 Wien, Austria