According to the Finnish company IndoorAtlas, animals such as sea turtles and birds will use changes in the Earth's magnetic field to move around and determine their locations. Inspired by this, IndoorAtlas has created a program that uses the magnetic fields found inside the structure of buildings as tracking tools. The program can track smartphone users -- no Internet connection required -- inside buildings within 0.1 and 2 meters accuracy, says Wired.
To do so, IndoorAtlas has employed the compasses that are already housed within most smartphones. The firm's tool identifies magnetic field disturbances created by building floors and hallways to locate a person's smartphone. So far, IndoorAtlas has launched special mapping tools for app developers, who, after securing a building's floor plan, can use the tools to collect magnetic field information to create indoor location software. The video here demonstrates how IndoorAtlas works.
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