Roskilde 2011 Festival activity based on the number of mobile phones with enabled bluetooth.
The height of different parts of the festival area represents number of detected devices over time. The color was assigned to every scanning point depending on it's proximity to one of the stages.
This project was a collaboration with Jakob Eg Larsen and Arek Stopczynski from the Danish Technical University. When I was responsible for the visualization part they were taking care of building the network of bluetooth scanners and and data processing.
This visualization was built with Plask (plask.org) and is being ported to WebGL at the moment.