Jon Bruner’s “American Migration” visualization, based on IRS data, demonstrates how “Americans are enormously mobile: 37.5 million people moved from one house to another last year, with 4.3 million of them moving between states.” Bruner’s interactive map lets you click on a specific county and see both the immigration and emigration data for that location — where folks move from and where they move to.
Screenshot from the “American Migration” visualization (click for full interactive version).
As Flowing Data points out, this migration map is “much improved” over the map Bruner created with the same data last year: “The colors are more subtle and more meaningful, and you can turn off the lines so that it’s easier to see highlighted counties when the selected county had a lot of traffic during a selected year.”
On his own blog, Bruner lists what he sees as the improvements:
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