Forward azimuthal angle between two positions on the reference ellipsoid:

Azimuth angle between two fully specified geodetic positions:

Azimuth angle between any two points on the Earth, using the parameters of the default datum "ITRF00":

Angles can also be specified as DMS strings:

Direction between geodetic positions, in different formats:

Height and time information is ignored in GeoDirection computations:

Direction between points in different datums. The computation is performed after changing the datum of the second point to the datum of the first:

The difference is very small:

GeoDirection is not a symmetric function:

GeoDirection is a partial inverse of GeoDestination :

GeoDirection returns part of the information returned by GeoDisplacement :

Compute bearings between a list of points:

Construct points on a geodesic circle, starting with regular bearings:

Azimuths between points of the circle increase, modulo angle determination:

Construct multiple points along a geodesic, at regular distance intervals:

Bearing does not stay constant along a geodesic:

GeoDirection is not a smooth function for nearly antipodal points:

Compare with the corresponding results on the surface of a sphere:

Initial bearings of geodesics connecting antipodal pairs of points are complementary:

Graphically: