The vision of the computer scientist Charlie Catlet it has always gone beyond the limits of the moment. In 2012, when she was working with the US Environmental Protection Agency to assess the effects of pollution on residents, she had a problem: little data from environmental sensors.
There were only 12 air quality sensors in the entire city of Chicago.
Yet the time to realize his plans was near: the city was about to install 300.000 new streetlights. It was at that moment that Catlett's ideas took shape: the scientist he dreamed of a big one network of sensors capable of measuring everything from heat to noise pollution.
Wired city, studied citizenship
Since then, Catlett's “Array of Things” initiative has brought together scientists, residents and government agencies to revolutionize precision urban sensing. In the 7 years that separate 2012 from 2019, another 140 "nodes" of this network they took their seats in the streetlights of Chicago.
Inside there is everything: cameras, microphones, humidity and vibration sensors, magnetic fields, temperature, pollution and barometric pressure.
That's not all: each node of the array of Things is equipped with an Nvidia graphics processing unit (or GPU) to perform calculations on images in the field and send the processed data to the cloud. How can it end? This thing it can become a lot more dystopian than we can imagine but if you ask Catlett, who calls himself a privacy advocate, if we limit sensors to “urban diagnostics”The result is fantastic.
What urban sensors “see”
The data from this "urban network" have been analyzed by dozens and dozens of studies. They made it possible to evaluate the safety of level crossings, monitor the use of pedestrian crossings and detect floods along the Chicago River.
The University of Michigan Institute for Social Research used environmental sensor data for a public health study, finding higher asthma rates in places where sensors detected more air pollution.
Last year, Catlett himself collaborated with Microsoft Research to install 115 low-cost, solar-powered air quality sensors on bus shelters. The results showed pollution hot spots near industrial corridors on Chicago's South and West Sides with unprecedented resolution (here the report). Environmental and community groups are now lobbying city authorities to make policy changes.
The team plans to expand to thousands of air quality nodes in the coming years.
How do you "see" the future?
Catlett's projects are entering a crucial phase. By the end of the year, another 50 new generation nodes will replace the same number. Dozens of nodes have been installed throughout California for detect fires and analyze climate change. Oregon wants 100 to detect earthquakes. The National Science Foundation wants 80.
Slowly, the concept of the “urban fitness tracker” is going global, just in time to study our evolving world. Including us, its inhabitants, who knows in what way.
