queue-consumer.py 文件源码

def landed_check(coordinate_list, r):
    '''Check if the plane has not moved fast enough recently to be airborne.'''
    # first do naive check - two points distance / time
    naive_distance = great_circle(coordinate_list[0][0:1], coordinate_list[-1][0:1]).meters
    time_delta = coordinate_list[-1][3] - coordinate_list[0][3]
    if time_delta < 200:
        return 0
    elif (naive_distance / time_delta) < 8.94:
        # logger.debug("Something is moving too slow to be flying!")
        return airport_proximity_check((coordinate_list[-1][0], coordinate_list[-1][1]), r)
    else:
        return 0