GPS refers to a Geographic Positioning System. GPS receivers interpret signals from satellites to determine the receiver's location anywhere on earth. The signal bounces from Earth to space and back. Most GPS receivers process and display this information to give users a graphical indication of their place, direction and rate of travel -- all superimposed on a map.the point is to get you from point A to point B without having to ask a stranger for directions. Any baby boomer man can appreciate that.
GIS refers to Geographic Information Systems. Although just about any information can be...