Neil Freeman's rather postmodern fake is the new real site has a graphic of the "fifty largest metro areas (in blue), disaggregated from their states (in orange). Each has been scaled and sorted according to population. The metro areas are US-Census defined CBSAs and MSAs":
This actually took me a while to figure out, but what seems to be going on is that metro areas and states minus their top-50 metro area populations are scaled to population and ranked in that order. Actually pretty interesting: it shows how much of the US population lives in those 50 cities vs. the rest of the country.
And by the way, I still don't believe Jacksonville actually exists, let alone that it's one of the 50 largest urban areas in the US. Have you ever met anyone from there? Have you ever, like, heard of someone taking a trip to Jacksonville? Didn't think so. And yet we're supposed to believe it's home to 1.3 million people? Please.
Via urban cartography.