Ladies and gentlemen: this is how you use data for development purposes.
This is a map from DC Action for Children, a nonprofit that advocates for better city policies for children and families. They recently launched a revamped version of their data tool, DC KIDS COUNT, which is part of a national program funded by the Annie E. Casey Foundation.
A few years ago, I had a boss who was fond of saying, "Maps are great, but then what?" The point he was making - and I think it's a good one - was that with all of the new data visualization and crowdsourcing technology that's arisen over the last decade, it's easy to get caught up in making really neat-looking infographics that nonetheless fail to serve any strategic purpose. And if these maps stood alone, that description would probably apply to them; yes, a map that shows how sharply student reading levels decline as you move across the city is arresting, and depressing, but it doesn't offer a clear call to action.
What I love about DCAC's tool, though, is that it was designed for a reason and for a specific audience. Its maps provide nonprofits with hard data they can use in lobbying local officials, particularly ANCs (Advisory Neighborhood Committees - a local body of government in DC) and city council members. They also provide a clear visual reference for DCAC itself to use in making their case to local politicians for more child-friendly policies on issues like school funding. And - should these politicians choose to back a given initiative or policy - they now have accessible, engaging data to which they can refer when trying to get their peers on board.
If you're interested in data tools or issues of child poverty and development at all, I encourage you to go check out what DCAC is doing - their data is open-source and available to all, so if you want to play with it and see what you can learn about kids in this city, go for it. (Their incredibly dynamic founder, HyeSook Chung, is also posting some neat information on their blog that explains a little bit about their methodology and the choices they made in developing this.)
(Full disclosure: I participated in a volunteer consulting project last summer that worked with DCAC to advise on potential changes to the old DC Kids Count tool. However, I was not involved at all in the creation of the final product - I was part of one team out of several, and my work ended in August, before the changes began.)