Fans of Tufte will immediately recognize it. If you guessed something transportation related, you are correct. The great dataplotter Eric Fischer has once again wrangled meaning out of a hapless API: The chart above shows BART train movement between Millbrae (top) and Richmond (bottom) between 7:30 AM to 9:30 AM on July 2. The entire day along with Eric’s comments are available on Flickr.
(I find the thought of a Muni version of this chart mildly terrifying.)
On a side note, Eric is in print! His tourist vs local mapping made the Boston Sunday Globe! Congratulations!