MIT researchers have built a wearable sensor system that automatically creates a digital map of the environment through which the wearer is moving.
… so in addition to the rangefinder, the researchers also equipped their sensor platform with a cluster of accelerometers and gyroscopes, a camera, and, in one group of experiments, a barometer (changes in air pressure proved to be a surprisingly good indicator of floor transitions). The gyroscopes could infer when the rangefinder was tilted — information the mapping algorithms could use in interpreting its readings — and the accelerometers provided some information about the wearer’s velocity and very good information about changes in altitude.
article about ‘LA Cops Embrace Crime Predicting Algorithm’
'The software is built by a startup company,PredPol, based in Santa Cruz, California, and builds on computer science and anthropological research carried out at Santa Clara University and the University of California, Los Angeles.
The inputs are straightforward: previous crime reports, which include the time and location of a crime. The software is informed by sociological studies of criminal behavior, which include the insight that burglars often ply the same area.’