Datum Comparisons NAD83 & WGS84

This presentation explores the development and primary relationship and differences of the North American Datum of 1983 (NAD 83), the World Geodetic System of 1984 (WGS 84) and the International Terrestrial Reference Frame (ITRF).

Objectives

• When were NAD 83, WGS 84 and ITRF first published
• What organizations are responsible for these reference frames
• How are they similar and how are they different