They’re Tracking When You Turn Off the Lights

Municipal Sensor Networks Measure Everything From Air Pollution to Pedestrian Traffic; Building ‘a Fitbit for the City’

Hidden on a Brooklyn rooftop, his wide-angle infrared camera peers at windows of thousands of buildings across the East River. The camera detects 800 gradations of light, a sensitivity that lets his software determine what time households turn in, what kind of light bulbs they use, and even what pollutants their buildings emit.
In the coming weeks, the University of Chicago will install dozens of sensor packs on street lamps in the city’s central business district and elsewhere. Each pack, roughly the size of a thick laptop, contains 65 sensors intended to capture data on environmental conditions including sound volume, wind and carbon-dioxide levels, as well as behavioral data such as pedestrian traffic flow as revealed by Wi-Fi-enabled smartphones.

via They’re Tracking When You Turn Off the Lights – WSJ – WSJ.

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