Parameters For Some Geodetic Systems
- Australian Geodetic Datum 1966 and Australian Geodetic Datum 1984 (AGD84)
AGD66 and AGD84 both use the parameters defined by Australian National Spheroid (see below)
- Australian National Spheroid (ANS)
| Parameter | Notation | Value |
|---|---|---|
| semi-major axis | a | 6378160.000 m |
| Reciprocal of Flattening | 1/f | 298.25 |
- Geocentric Datum of Australia 1994 (GDA94)
GDA94 uses the parameters defined by GRS80 (see below)
- Geodetic Reference System 1980 (GRS80)
| Parameter | Notation | Value |
|---|---|---|
| semi-major axis | a | 6378137 m |
| Reciprocal of flattening | 1/f | 298.257222101 |
see GDA Technical Manual document for more details; the value given above for the flattening is not exact.
- World Geodetic System 1984 (WGS84)
The Global Positioning System (GPS) uses the World Geodetic System 1984 (WGS84) to determine the location of a point near the surface of the Earth.
| Parameter | Notation | Value |
|---|---|---|
| semi-major axis | a | 6378137.0 m |
| Reciprocal of flattening | 1/f | 298.257223563 |
| Constant | Notation | Value |
|---|---|---|
| Semi-minor axis | b | 6356752.3142 m |
| First eccentricity squared | e2 | 6.69437999014x10−3 |
| Second eccentricity squared | e′2 | 6.73949674228x10−3 |
see The official World Geodetic System 1984 document for more details.
A more comprehensive list of geodetic systems can be found here
Read more about this topic: Geodetic Datum
Famous quotes containing the words parameters and/or systems:
“Men have defined the parameters of every subject. All feminist arguments, however radical in intent or consequence, are with or against assertions or premises implicit in the male system, which is made credible or authentic by the power of men to name.”
—Andrea Dworkin (b. 1946)
“We have done scant justice to the reasonableness of cannibalism. There are in fact so many and such excellent motives possible to it that mankind has never been able to fit all of them into one universal scheme, and has accordingly contrived various diverse and contradictory systems the better to display its virtues.”
—Ruth Benedict (1887–1948)