This is Manhattan in the evening via Twitter GPS traces. He tracks people’s location over 4 hour periods and the lines represent their movements. Movements go from blue to red, so longer trails and more red means people are more on the move. I love the evening picture above. If you go to Jeff Clark’s website you get the day broken down into chunks, and a thorough explanation of how he did it.
Mapping movements in Manhattan
Posted by Shubha on May 6, 2012