This is a pretty common staircase type where I live but how do I map it? Should I make lines over each other multiple times, each with different level? Or just one line and don’t care about the other floors? I don’t know if I’m searching for wrong terms but I have a surprisingly hard time on getting info about stairs mapping.
Can you point me to the right direction or post some example?
If you want (!) to map this at all (I see little use in this, who is going to use this data), then yeah, one line for each flight of stairs, connect them with highway=footway and tag layers/levels, bridge=yes, as applicable.
You have to draw them only once, than you can use the tag
repeat_on, and list the levels: https://wiki.openstreetmap.org/wiki/Key:repeat_onBut yes, it’s super micro mapping, I would map this only, if the full building is mapped with the same detail level.