The United States, illustrated in tangrams! Well, I guess they're not tangrams precisely, because the shapes vary in size. However, they feature the geometric components of traditional tangrams—squares, triangles, and parallelograms. Anyways, this was really fun to create; Nebraska was the easiest to illustrate, the hardest was either West Virginia or North Carolina.
Now a group working at Microsoft Research Asia has shown that tracking the location of taxicabs could be a better way to identify the underlying problems with a city's transportation network, helping officials determine how to best ease congestion. The researchers used GPS data from more than 33,000 Beijing taxicabs. That data was collected in 2009 and 2010.
Planimator / built in three.js / "Even Westvang's sketchbook of data visualization. After putting the children to bed I sometimes build visualizations to demonstrate the spectacular inner life of public data."
Metrography – London Tube Map to large scale collective mental map / via @binx