Quote:
Originally Posted by MonkeyRonin
Most correspond pretty closely with CSA populations, though Detroit (higher) and Dallas (lower) are a bit of surprise.
Philadelphia and Baltimore are of course "surprises", though those also pick up parts of neighbouring metros so they're not so much a reflection of their own populations as it is that they're just in a heavily populated corridor with larger cities bleeding into their hinterlands.
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Cleveland and Pittsburgh, with over 3.7 million listed, both include much of the Youngstown-Warren metro populations. Also, Cleveland's radius has Canton, OH, which usually isn't included on CMSA population figures. Very interesting tool though, as I remember a mathematical formula that creates a radius around a metro area, based on population, as pertains to it's sphere of influence. This seems to emulate that formula, to a degree.