def approx_miles_between()

in 11_realtime/flightstxf/flights_transforms.py [0:0]

• 12 lines of code
• 1 McCabe index (conditional complexity)

def approx_miles_between(lat1, lon1, lat2, lon2):
    # convert to radians
    lat1 = float(lat1) * np.pi / 180.0
    lat2 = float(lat2) * np.pi / 180.0
    lon1 = float(lon1) * np.pi / 180.0
    lon2 = float(lon2) * np.pi / 180.0

    # apply Haversine formula
    d_lat = lat2 - lat1
    d_lon = lon2 - lon1
    a = (pow(np.sin(d_lat / 2), 2) +
         pow(np.sin(d_lon / 2), 2) *
         np.cos(lat1) * np.cos(lat2));
    c = 2 * np.arcsin(np.sqrt(a))
    return float(6371 * c * 0.621371)  # miles