Detect areas mapped on top of highway=* areas

[skyper]

It is a tagging error to not cut out buildings of squares (highway=*;area=yes with closedway or highway=* with multipoliygon) and it is probably true for almost all areas mapped on top one squares.

See ​https://github.com/gravitystorm/openstreetmap-carto/issues/688 for more information.

Please have validator warn about the problematic mapping and offer a fix to change the closedway into a multipolygon and cut out the inner areas by adding them to the multipolygon with role "inner". Thanks

[Don-vip]

can you please attach a sample .osm file?

[skyper]

example

[skyper]

Replying to Don-vip:

can you please attach a sample .osm file?

see josm_13472_example.osm​

[skyper]

I am not sure anymore if the automatic fix is the best solution. There are at least examples with different layers where a layer=* is the proper solution.

Objects with different layer=* should be excluded from the warning/test.