ODM2 Controlled Vocabularies Login

Elevation Datum Vocabulary

A vocabulary for describing vertical datums. Vertical datums are used in ODM2 to specify the origin for elevations assocated with SamplingFeatures.

Term Name Definition
AHD AHD Australian Height Datum. Height datum used for standardised elevations across Australia. The datum surface is defined as that which passes through mean sea level at the 30 specified tide gauges and through points at zero AHD height vertically below the other basic junction points.
EGM96 EGM96 EGM96 (Earth Gravitational Model 1996) is a geopotential model of the Earth consisting of spherical harmonic coefficients complete to degree and order 360.
MSL MSL Mean Sea Level
NAVD88 NAVD88 North American Vertical Datum of 1988
NGVD29 NGVD29 National Geodetic Vertical Datum of 1929
Unknown Unknown The vertical datum is unknown