Europe divided into regions of 1 million people

Yeah, this is true elsewhere too. Here in Austria, "Graz" is a region that contains most of the important parts of Styria (Steiermark), and "Steiermark" is one that contains mostly mountainous parts of what's now Styria plus most of Carinthia.

Umm… I don’t know what happened, exactly. When I first clicked the link to get a bigger picture, I *somehow* ended up on imgur, which only had a very low-resolution version. I could only find the big picture in the linked reddit, so I posted it.

I cannot reproduce this issue anymore, so I removed my comment.

Isn't the Imgur link used here the same? The Imgur link was provided by the OC creator in the Reddit thread

Statistical urbanisation is ~80%. I'd rather say, apart from the primacy Paris with its own dimension, the French urban population might be quite decentralised.

Didn't realize so much of France was so rural.

as a swede i have to say some of these groupings are a bit odd, like "södra götaland" which makes no sense whatsoever neither in name nor in area, or having västra götaland stretch into jönköping municipality..