The Global Positioning System (GPS) is a space-based satellite navigation system that provides location and time information in all weather conditions, anywhere on or near the Earth where there is an unobstructed line of sight to four or more GPS satellites.
Boston Globe technology writer Hiawatha Bray researched transformative events that lead to our new ability to navigate anywhere. Here are 13 pivotal moments in the history of GPS tracking and digital mapping that Bray points out.
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