This visualization shows the development of the crowd density during the Vienna City Marathon 2012. The "hotter" (i.e. black -> red -> yellow) regions are, the denser the crowd was at that location.
The data has been recorded by a smartphone application collecting live sensor data from users. It has been developed by the Tobias Franke of the Embedded Intelligence Group, DFKI Kaiserslautern [1] and the Institute for Pervasive Computing, Linz [2].
The data is being collected in near real-time (delay ~ 1. min) directly from the mobile phones. This allows for an instantaneous heat map visualization. We used the CoenoSense platform [3] developed by Martin Wirz of the ETH Zurich's Wearable Computing Lab [4] to collect and data and generate this visualization.
The overall system allows event organizers and emergency services to gain an almost-live insight into the crowd dynamics at large scale events.
The software has been developed as a part of the SOCIONICAL research project [5].
[1] dfki.de/web/forschung/ei
[2] pervasive.jku.at
[3] coenosense.com
[4] wearable.ethz.ch
[5] socionical.eu
