Cloud-based map platform startup MapBox, which gives developers tools to add interactive maps to their web and mobile offerings, clad in their own brand colours/designs — and counts foursquare, Uber, ...

As one of the map's authors, Bobby Sudekum, writes on the Mapbox blog, it's a work in progress. They've made the data they collected available for anyone to use, and if you know of other no-fly zones ...