Mapping Hidden Twitter Data For Epidemiology

jamie found this visualization of air travel, which might be usable in some sort of proxy for the spread of flu virus (to choose a random application). Jer Thorp, an artist and educator from Vancouver, Canada (and a former geneticist), searched Twitter for the phrase "Just landed in" and obtained lat/lon coordinates for both the indicated airport and the Twitter user's home location, as recorded in their Twitter profile. He then produced videos of multi-hour stretches of air travel that had been latent in the Twitter information stream.