@Test
public void testHaversineFormula_Distance6() {

    double lat1 = 41.2572;
    double lon1 = -95.9656;
    double lat2 = 49.7237;
    double lon2 = 13.3422;
    double expResult = 7781.1365;
    double result = GreatCircleDistance.haversineFormula(lat1, lon1, lat2, lon2) / 1000; // Adjustment to kilometres.
    assertEquals(expResult, result, 0.3);
}