O. S. Adams

Oscar Sherman Adams (January 9, 1874 – March 5, 1962) was an American mathematician, geodesist, and cartographer who worked for the United States Coast and Geodetic Survey from 1910 to 1944. He was one of the foremost experts on map projections, and was instrumental in the foundation of the North American Datum of 1927 and the State Plane Coordinate System.