San Francisco Bay Area
A map of human movement in the San Francisco Bay Area. Using geotagged Tweets, researchers found that metro downtowns are full of people who move about more (yellow), while suburban types tend to stay close to home (red).
New York City
Motion map for New York City. Yellow dots are wider traveler while red dots stay close to home. The data comes from 180,000 Twitter users in 2011.
The windy city map reveals a pocket of wide travelers downtown, perhaps tourists and commuters. The researchers submitted their findings April 4 to the physics preprint website arXiv.
Los Angeles Motion
Patterns of life in Los Angeles as gleaned from geotagged Tweets.
The movements of 180,000 people in 2011 reveal a predictable home (red region) to work (narrow yellow region) axis. Blue regions are less-visited areas.