public void RadiansToAviaticTest()
{
Assert.Equal(90, GreatCircle.RadiansToAviatic(0));
Assert.Equal(0, GreatCircle.RadiansToAviatic(Math.PI / 2.0));
Assert.Equal(270, GreatCircle.RadiansToAviatic(Math.PI));
Assert.Equal(270, GreatCircle.RadiansToAviatic(-Math.PI));
Assert.Equal(180, GreatCircle.RadiansToAviatic(-Math.PI / 2.0));
}
private static void InternalDistDir(GeographicPosition startPosition,
GeographicPosition endPosition,
ref double distance, ref double direction)
{
double deltaLat = endPosition.Latitude - startPosition.Latitude;
double deltaLon = endPosition.Longitude - startPosition.Longitude;
double deltaX = deltaLon * GreatCircle.MetersPerDegreeLongitude * Math.Abs(Math.Cos(startPosition.Latitude * Math.PI / 180.0));
double deltaY = deltaLat * GreatCircle.MetersPerDegreeeLatitude;
distance = Math.Sqrt(deltaX * deltaX + deltaY * deltaY);
direction = GreatCircle.RadiansToAviatic(Math.Atan2(deltaY, deltaX));
}