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G Geodetic Datums
MiLLennium Command Descriptions Manual 215
G GEODETIC DATUMS
The following tables contain the internal ellipsoid parameters and transformation parameters used in the GPSCard.
The values contained in these tables were derived from the following
DMA technical reports:
1. TR 8350.2 Department of Defence World Geodetic System 1984 and Relationships with Local
Geodetic Systems - Revised March 1, 1988.
2. TR 8350.2B Supplement to Department of Defence World Geodetic System 1984 Technical Report
- Part II - Parameters, Formulas, and Graphics for the Practical Application of WGS84
- December 1, 1987.
Table G-1 Reference Ellipsoid Constants
ELLIPSOID ID CODE a (metres) 1/f f
Airy 1830 AW 6377563.396 299.3249647 0.00334085064038
Modified Airy AM 6377340.189 299.3249647 0.00334085064038
Australian National AN 6378160.0 298.25 0.00335289186924
Bessel 1841 BR 6377397.155 299.1528128 0.00334277318217
Clarke 1866 CC 6378206.4 294.9786982 0.00339007530409
Clarke 1880 CD 6378249.145 293.465 0.00340756137870
Everest (India 1830) EA 6377276.345 300.8017 0.00332444929666
Everest (Brunei & E.Malaysia) EB 6377298.556 300.8017 0.00332444929666
Everest (W.Malaysia & Singapore) ED 6377304.063 300.8017 0.00332444929666
Geodetic Reference System 1980 RF 6378137.0 298.257222101 0.00335281068118
Helmert 1906 HE 6378200.0 298.30 0.00335232986926
Hough 1960 HO 6378270.0 297.00 0.00336700336700
International 1924 IN 6378388.0 297.00 0.00336700336700
South American 1969 SA 6378160.0 298.25 0.00335289186924
World Geodetic System 1972 WD 6378135.0 298.26 0.00335277945417
World Geodetic System 1984 WE 6378137.0 298.257223563 0.00335281066475
Table G-2 Transformation Parameters (Local Geodetic to WGS84)
GPSCard
Datum ID
number
NAME DX DY DZ DATUM DESCRIPTION ELLIPSOID
1 ADIND -162 -12 206 Adindan (Ethiopia, Mali, Senegal & Sudan) Clarke 1880
2 ARC50 -143 -90 -294 ARC 1950 (SW & SE Africa) Clarke 1880
3 ARC60 -160 -8 -300 ARC 1960 (Kenya, Tanzania) Clarke 1880
4 AGD66 -133 -48 148 Australian Geodetic Datum 1966 Australian National
5 AGD84 -134 -48 149 Australian Geodetic Datum 1984 Australian National
6 BUKIT -384 664 -48 Bukit Rimpah (Indonesia) Bessel 1841
7 ASTRO -104 -129 239 Camp Area Astro (Antarctica) International 1924
8 CHATM 175 -38 113 Chatum 1971 (New Zealand) International 1924
9 CARTH -263 6 431 Carthage (Tunisia) Clarke 1880
10 CAPE -136 -108 -292 CAPE (South Africa) Clarke 1880
11 DJAKA -377 681 -50 Djakarta (Indonesia) Bessel 1841
12 EGYPT -130 110 -13 Old Egyptian Helmert 1906
13 ED50 -87 -98 -121 European 1950 International 1924
14 ED79 -86 -98 -119 European 1979 International 1924
15 GUNSG -403 684 41 G. Segara (Kalimantan - Indonesia) Bessel 1841
G GEODETIC DATUMS