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Where We Came From, State by State

ca-migration 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?!)

Declassified Migration Documents Website

Migration Declassified is a product of the Mexico/Migration Project at the National Security Archive, an independent research center and repository of declassified documents based at The George Washington University in Washington, D.C. It supports the rights of migrants in North America by increasing transparency around security and law enforcement institutions in Mexico and the United States. The site serves as a dissemination point for recently declassified documents that shed light on such issues as migration policy, border enforcement, migrant detention programs, and deportation policies. Its blog will feature commentary on migration-related news items and links to related resources.

Mashup of US migration patterns

Here’s a nice little mashup from Forbes. They created an interactive map visualizing migration data into and out of US counties based on 2008 IRS data*. The black lines represent people moving to a certain place, the red lines are people moving out. TONS of people moving to SF (where I live). No wonder I have to stand in line so long for my strawberry balsamic ice cream fix from BiRite Creamery!

*I went looking for said IRS migration data and found that:

The County-to-County Migration Data are updated annually and available for purchase as follows:

* $200 per year for the entire United States
* $10 per year per State
* $500 for the entire United States for all years

It’s unfortunate to say the least that IRS feels the need to charge for access to public domain data that the public has already paid for once already. Has anyone come across other data sets like this? please leave us a comment.

[Thanks BoingBoing!]