| Code Figure |
Meaning |
0
|
Earth assumed spherical with radius = 6,367,470.0 m |
1
|
Earth assumed spherical with
radius specified (in m) by data producer |
2
|
Earth assumed oblate spheriod
with size as determined by IAU in 1965
(major axis = 6,378,160.0 m, minor axis = 6,356,775.0 m, f = 1/297.0) |
3
|
Earth assumed oblate spheriod
with major and minor axes specified (in km) by data producer
|
4
|
Earth assumed oblate spheriod
as defined in IAG-GRS80 model (major axis = 6,378,137.0 m, minor axis = 6,356,752.314 m, f =
1/298.257222101) |
5
|
Earth assumed represented by
WGS84 (as used by ICAO since 1998) (Uses IAG-GRS80 as a basis) |
| 6 |
Earth assumed spherical with radius = 6,371,229.0 m |
| 7 |
Earth assumed oblate spheroid with major and minor axes
specified (in m) by data producer |
| 8 |
Earth model assumed spherical with radius 6,371,200 m,
but the horizontal datum of the resulting Latitude/Longitude field is
the WGS84 reference frame |
| 9 |
Earth represented by the OSGB 1936 Datum,
using the Airy_1830 Spheroid, the Greenwich meridian as 0 Longitude, the Newlyn datum as mean sea
level, 0 height. |
10-191
|
Reserved |
192-254
|
Reserved for Local Use
|
255
|
Missing
|