//gets the angle between two coordinates
public static double GetDirection(GeoCoordinate coordinates1, GeoCoordinate coordinates2)
{
var latitude1 = DegreeToRadian(coordinates1.Latitude);
var latitude2 = DegreeToRadian(coordinates2.Latitude);
var longitudeDifference = MathHelpers.DegreeToRadian(coordinates2.Longitude - coordinates1.Longitude);
var y = Math.Sin(longitudeDifference) * Math.Cos(latitude2);
var x = Math.Cos(latitude1) * Math.Sin(latitude2) -
Math.Sin(latitude1) * Math.Cos(latitude2) * Math.Cos(longitudeDifference);
return((RadianToDegree(Math.Atan2(y, x)) + 360) % 360);
}
