San Francisco, CALIFORNIA - For the most part, GPS works great. It gives people the ability to get from point A to point B with a simple press of a button on a smartphone. That's until you hit a big city.
Tall buildings and satellite signals don't like each other and in an era where companies like UBER and YELP depend on accurate navigation, Pete Tenereillo of California start up Pathsense has this to say.
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