[Tagging] simple 3D buildings, proposed redefinition of building:levels and building:min_level for building:part

Martin Koppenhoefer dieterdreist at gmail.com
Wed Mar 8 17:32:44 UTC 2017

I propose to deprecate the current definition of building:levels which is:

- building:min_level is the amount of levels of the underneath
building_part below the tagged building:part

- building:levels=building:min_level + amount of levels for this part

in favor of

- building:min_level unchanged

- building:levels=amount of levels for this part

What do you think? We could migrate the existing building:levels with the
time or in one go.
I don't think it's too late for this, there are only 33 991 objects with a
building:min_level tag now, (the rest will not change), and you can easily
see if the indication is according to the old or the new scheme by looking
at the values:

building:levels - building:min_level < 0
yes: new
no: old

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