Hi Antoine,

The columns were added based on a survey. The source of the changeset was set to “existing data” because the main reason I was doing those changesets, is to improve tagging of already existing ways. Improve in a sense that levels under ground have a tunnel tag, overground a bridge and at base level I added highway=pedestrian to the public rooms.

I don’t have much experience with tagging levels, so I didn’t add any new level tags. If I have removed any level tags, this was by accident. Sorry about that.

Kind regards,
JJJWegdam