Fundamentals of Geodesy Pt VII – Vertical Datums & Geoid Models 2

The development of a geodetic vertical datum for the United States traces its history to 1877. Since that time the U.S. Coast & Geodetic Survey, now called the National Geodetic Survey has conducted high accuracy leveling across the country. This presentation will discuss the historical development of those efforts along with the evolution of the computation of increasingly more accurate geoid models to support GPS-derived heights.