The world at large owes a good bit to Maxwell Smart, you know. Granted, it's hard to directly link the faux shoe phone to the GPS-equipped kicks that are around today, but the lineage is certainly apparent. The only issue with GPS in your feet is how they react when you waltz indoors, which is to say, not at all. In the past, most routing apparatuses have used inertial measurement units (IMUs) to track motion, movement and distance once GPS r
