CHATHAM ISLANDS: Imported
OSM Page: http://wiki.openstreetmap.org/wiki/Tag:amenity%3Dgrave_yard
Since this is for smaller grave sites this is what we should use.
HB: pity that it overlaps with the cemetery_pnt layer, for which
grave_yard is more appropriate.
some good talk about tagging individual graves here:
Chathams imported by HB 16Apr2010
HB: mainland UPLOADED 2010-11-25 in changeset 6452386