public static double Distance(this ICoordinate x, double lat, double lon)
{
return(GCDis.Distance(x.Lat, x.Lon, lat, lon));
}
/// <summary>
/// The great circle distance between two points, in nautical miles.
/// </summary>
public double Distance(double Lat, double Lon)
{
return(GCDis.Distance(this.Lat, this.Lon, Lat, Lon));
}
