I believe it's from the Icelandic address import project osm.wiki/Sta%C3%B0fangaskr%C3%A1_Import

Why did you add an airport that doesn't exist?

Ah, thanks for pointing them out. Removed in changeset/139436312

Hi,

It's a mistake to tag airport runway lines as area:aeroway=runway, they should simply be aeroway=runway (as this was before you made this change). This changeset removed a runway from an international airport. I've fixed all the changes you made in Iceland.

I've just reinstated the runway in changeset/139255072. I think this change (and other recent changes) are errors

Sorry for the late reply, I was on my holidays. It looks like you did the right thing in reverting these changes, so thanks for that. I'll keep an eye out for any similar changes in the future, in case the user resurfaces with another account

Hi, was this just a popup thing? The website no longer exists and I can't find any info about this online.

(building:levels, not buildings)

Hi,

Bing Maps imagery isn't a particularly good source for alignment in Iceland, it can be off by tens of metres (depending on the age of the imagery). Maxar is a better source (available in iD), or open government data like that provided by Landmælingar Íslands.

https://www.lmi.is/is/landupplysingar/gagnagrunnar/is-50v

I realigned Grímsey in changeset/129991622.