Civis Analytics, a data analysis firm based in Chicago, was founded by alumni of the Obama campaign, who spent years figuring out how to find specific voters – and convince them to vote for Barack Obama.
"We came to this because it is a big and difficult problem," says Kate Jordan, engagement manager at Civis. "There are a lot of people who want to enroll individuals, but it's a small percentage of the population, about 15 to 16 percent nationally, and you have limited time and resources. How do you decide whose door to knock on, or where is it best to have your community events?"
Civis's map has an uninsured rate for each census tract, which usually includes about 1,000 or so people. This is a pretty granular level of detail: There are over 70,000 census tracts across the country, usually about the size of one neighborhood. The District of Columbia alone is divided into 179 different jurisdictions. And here's what the city looks like, when you break it down by the uninsured rate of each jurisdiction:
Here are what a few other cities look like, starting with Baltimore: