Server maintenance will be performed on Saturday December 15th from 8:00 a.m. to 5:00 p.m. MST. Please plan for intermittent disruptions to MetEd during this period of time.

Understanding Heights and Vertical Datums

Understanding Heights and Vertical Datums
Aimed at scientists, engineers, modelers and other technical users of GIS/mapping applications, this lesson provides a basic understanding of different vertical datums, how they are defined, some of their strengths and weaknesses and how to choose the appropriate datum for a given application. The lesson starts with basic definitions of height and vertical datums and guidance on choosing and working with the appropriate datum for a given situation. It then provides a conceptual introduction to ellipsoidal, geopotential and tidal datums including appropriate uses, examples and pros and cons.