public void CalculateVelocity(FlightDataDTO flight)
        {
            foreach (var oldFlight in oldTrackData)
            {
                if (oldFlight.Tag == flight.Tag)
                {
                    int xOld    = oldFlight.XCor;
                    int yOld    = oldFlight.YCor;
                    int xNew    = flight.XCor;
                    int yNew    = flight.YCor;
                    int highOld = oldFlight.Altitude;
                    int highNew = flight.Altitude;

                    //Udregner distancen flyet er fløjet
                    double distanceXY       = Math.Sqrt(Math.Pow((xOld - xNew), 2) + Math.Pow((yOld - yNew), 2));
                    double distanceAltitude = highOld - highNew;

                    double distance = Math.Sqrt(Math.Pow(distanceXY, 2) + Math.Pow(distanceAltitude, 2));

                    //Udregn tiden det har taget

                    double time = (flight.TimeStamp - oldFlight.TimeStamp).TotalSeconds;

                    int velocity = Convert.ToInt32(distance / time);

                    flight.Velocity = velocity;
                }
            }
        }
        public void calculateCourse(FlightDataDTO flight)
        {
            foreach (var oldFlight in oldTrackData)
            {
                if (oldFlight.Tag == flight.Tag)
                {
                    int x1 = oldFlight.XCor;
                    int x2 = flight.XCor;
                    int y1 = oldFlight.YCor;
                    int y2 = flight.YCor;


                    if (x1 == x2)
                    {
                        if (y1 > y2)
                        {
                            flight.Course = 180;
                        }
                        else
                        {
                            flight.Course = 0;
                        }
                    }
                    else if (y1 == y2)
                    {
                        if (x2 > x1)
                        {
                            flight.Course = 90;
                        }
                        else
                        {
                            flight.Course = 270;
                        }
                    }
                    else
                    {
                        int course;

                        course = Convert.ToInt32(((180 / Math.PI) * Math.Atan((Convert.ToDouble(x2 - x1)) / (y2 - y1))));

                        if ((x2 > x1 && y1 > y2) || (x1 > x2 && y1 > y2))
                        {
                            course       += 180;
                            flight.Course = course;
                        }
                        else if (x1 > x2 && y1 < y2)
                        {
                            course       += 360;
                            flight.Course = course;
                        }

                        else
                        {
                            flight.Course = course;
                        }
                    }
                }
            }
        }