I declare this bulk data visualization day! NY Times Upshot blog today posted a cool visualization called Where We Came From, State by State. They charted how Americans have moved between states since 1900. The charts were compiled using Census microdata obtained from ipums.org at the University of Minnesota Population Center. Great state-by-state migration flows there. If they’d have asked me, I would have told them also about the free migration data available from the Internal Revenue Service. While the IRS data only goes back to 1990, it’s much more robust in that it gives county-by-county as well as state-to-state migration inflows and outflows. (By the way, do I need to remind our readers that none of this visualization would be able to be done without the US Census?!)
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