Today’s graphic is a map showing the Frontier Counties of the United States. To qualify as “frontier”, a county must have six or fewer people, per square mile.
(Graphic courtesy of Reddit [1].)
The thumbnail image below is click-expandable.
[2]
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Please send your graphic ideas to JWR [3]. (Either via e-mail or via our Contact form [4].) Any graphics that you send must either be your own creation or uncopyrighted.