Ah, whoops. You're right, it should have been cobblestone!
Many Melbourne lanes have basalt cobblestone (approx 25x35cm) surface.

Not sure I like these RapiD building outlines - I mean, they're mostly in the right place, but the alignments are really flaky. A start, I guess, as long as it's recognised that they're not 'complete'.

Yeah, I was splitting up some buildings, and the ID editor sometimes creates relations automatically. So, it was probably just one of those fragments - certainly not anything I created deliberately, or was even aware I'd created. If it was a three digit number, it would have been one of the unimelb buildings. Unless they have a 'public' name, I name them with their internal number.

HI there, I'm sorry, relations do my head in! I can't find this relation/584484312. I did have some problems splitting up a former single building into three parts, but I thought I'd cleaned up all the bits. Are you able to clarify the problem?