All posts by Cindra S. Craig

Where Theory Meets Practice: United States Standard Datum

This month we provide the history behind the theory and practice usually presented here by Dr. Charles Ghilani. This is an explanation of the first national horizontal datum used by the NGS (back then called the U.S. Coast and Geodetic Survey) in the late 1800s.  In the 1970s when NGS created its database, the data developed on...