Contextual awareness is one of the pillars of Google's recent push in mobile communications. You don't have to look far to see that: Google Now has been getting better and better at "guessing" the information that you need before you even look for it. But when it comes to location, we all know that it can use some help. Not just Google Now, actually. Most current location techniques are quite lacking indoors, underground, or simply fail to differentiate between you standing in front of a bus on one side or the other of the street.

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