A Map of Every Building in America by Tim Wallace, Derek Watkins and John Schwartz.
From the post:
Most of the time, The New York Times asks you to read something. Today we are inviting you, simply, to look. On this page you will find maps showing almost every building in the United States.
Why did we make such a thing? We did it as an opportunity for you to connect with the country’s cities and explore them in detail. To find the familiar, and to discover the unfamiliar.
So … look. Every black speck on the map below is a building, reflecting the built legacy of the United States.
…
I’m sure maps of greater value are possible, but this interactive map of buildings by the New York Times sets a high bar.
If that weren’t good enough, Microsoft has released USBuildingFootprints, described as:
This dataset contains 125,192,184 computer generated building footprints in all 50 US states. This data is freely available for download and use.
The datasets are listed by state.
What other data set(s) would take this map from being a curiousity to being actionable?