Table of Contents
GEODESY … where on earth are we?
What is Geodesy?
Earth-Centered, Earth Fixed (ECEF System)
What shape is the earth’s surface? (Geoid)
ELLIPSOID (ellipse rotated about the semi-minor (polar) axis
What help is a Geodesist?
Horizontal Datum Plane (HDP)
Coordinate System Comparison
Lattitude
Longitude
Horizontal datum
DATUM - the working surface
DATUM - different ellipsoids
What is a Projection
So What … I can see where I am
Some History of the Datums
Regional Datums are not Global
Further Evolution of Datums
World Geodetic System 1984
Comparison of ellipsoids
Approximate Difference between NAD27 and NAD83 at LPSRC
Glossary Review
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