Jim Stead, Stephen Holtznagel
Abstract
The method used to obtain orthometric heights from GPS observations is discussed, with particular emphasis on the national grid of geoid ellipsoid separations (AUSGEOID93). Results from field projects are compared with existing Australian Height Datum values from spirit levelling.
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The method used to obtain orthometric heights from GPS observations is discussed, with particular emphasis on the national grid of geoid ellipsoid separations (AUSGEOID93). Results from field projects are compared with existing Australian Height Datum values from spirit levelling.
Key concepts: Levelling, Geoid, Geodesy, Geodetic datum, Global Positioning System, Undulation of the geoid, Grid, Ellipsoid