Farms and isolated dwellings are usually confined to a very small
area. It does not make sense if they are automatically used in
addressing surrounding features. Still works to use them for
parenting when used with addr:place.
Resolves a couple of situations where a mixed use of places areas and
administrative boundaries would result in a hierarchy that did not
properly respect the contains relation.
Go back to using centroid when determining if one admin level
is within another. There are cases where boundaries are slightly
misaligned due to mapping errors (not using the same ways in the
relations).
Only declare boundaries the same when they have the same wikidata
tag _and_ have exactly the same geometry. This works around tagging
errors with the wikidata tag, which happen because of automated
edits to the wikidata tag.
The Polish community maps admin boundaries that span multiple
levels by duplicating the boundary relations. Detect this situation
by looking out for matching wikidata tags. The higher ranked
duplicates are then thrown out from the address pool by setting
their address rank to 0.
