One would not get much of an argument if they stated that global navigation and positioning by satellite was the most significant development in history affecting navigation and surveying. It was more than a change in technology. It resulted in a transition from determining position in relationship to nearby objects to determining position in relationship to worldwide spatial reference systems facilitating hundreds of applications.
GPS, Ashtech XII
GPS, Leica Surveying System 300
GPS, Garmin, Model etrex
