Tor classifies areas in San Francisco by bicycle. I’d say that’s about right.
Also available in print.
This is how Airbnb visitors judge location, which provides a view into where city centers begin and end.
The meaning of “middle-income” changes a lot depending on where you live and your household size.
I was curious who played for a single team over their entire career, who skipped around, and how the patterns changed over the decades.