Defines | |
#define | WGS84_A 6378137.0 |
#define | WGS84_B (WGS84_A*(1-WGS84_F)) |
#define | WGS84_E (sqrt(2*WGS84_F - WGS84_F*WGS84_F)) |
#define | WGS84_F (1/WGS84_IF) |
#define | WGS84_IF 298.257223563 |
Parameters defining the WGS84 ellipsoid. The ellipsoid is defined in terms of the semi-major axis and the inverse flattening. We also calculate some derived parameters which are useful for the implementation of the coordinate transform functions.
#define WGS84_A 6378137.0 |
Semi-major axis of the Earth, , in meters. This is a defining parameter of the WGS84 ellipsoid.
Definition at line 27 of file coord_system.h.
Semi-minor axis of the Earth in meters, .
Definition at line 34 of file coord_system.h.
Eccentricity of the Earth, where
Definition at line 36 of file coord_system.h.
The flattening of the Earth, .
Definition at line 32 of file coord_system.h.
#define WGS84_IF 298.257223563 |
Inverse flattening of the Earth, . This is a defining parameter of the WGS84 ellipsoid.
Definition at line 30 of file coord_system.h.