Water Resources Division, U.S. Geological Survey 1964 There is no generally accepted definition of geographic center, and no completely satisfactory method for determining it. Because of this, there may be as many geographic centers of a State or country as there are definitions of the term. The geographic center of an area may be defined as the center of gravity of the surface, or that point on which the surface of the area would balance if it were a plane of uniform thickness. application/pdf 10.3133/70039437 en U.S. Geological Survey Geographic centers of the United States reports