Wearable sensor maps disaster areas in real time
A sensor that digitally maps the area through which the wearer is moving, in real time, has been created by scientists at Massachusetts Institute of Technology (MIT). <snip> The system is still a prototype, but when tested in closed hallways without any Global Positioning System (GPS) signal, it was able to precisely map the environment as the user was moving through it.
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http://www.bbc.com/news/technology-19716723