Smartphone technology is widespread both in the academy and in the commercial world.
Almost every people have today a smartphone in their pocket, that are not only used to call
other people but also to share their location on social networks or to plan activities. Today
with a smartphone we can compute our position using the sensors settled inside the device
that may also include accelerometers, gyroscopes and magnetometers, teslameter,
proximity sensors, barometer, and GPS/GNSS chipset. In this chapter we want to analyze the …