[kermitdekikker]

Amsterdam is not extremely big but almost 1 million people is not extremely tiny. And even then size little to do with these stats unless you are talking about places with less than a handful of supermarkets.

Flatness is nice (but weather is bad). However, the main thing is infrastructure and mixed zoning. When you build bike lanes, walkable streets and lots of shops, a livable city will follow, not the other way around. Build for the traffic you want rather than the traffic you have.

These stats on supermarkets will be similar in many European cities btw. Many cities in the US are also relatively flat, and you don't see the same thing generally.