A series of experiments were made using the iPhone’s GPS and accelerometer features. The aim was to explore if such a device may be used to accurately track the movements of large numbers of people over large areas for long periods of time. While the iPhone has been rejected as a suitable means of achieving these goals, these images document something of the investigations.
An accelerometer captured micro-motion during a series of drifts (walking, buses, trains) and drew such variation in x,z,z onto a photographic series documentating each journey. A form of urban rhythm-analysis, though the accuracy of the iPhone data was found to be wanting in many important regards.