stops_creator_accra.py 文件源码

def get_crow_fly_distance(from_tuple, to_tuple):
    """
    Uses the Haversine formmula to compute distance
    (https://en.wikipedia.org/wiki/Haversine_formula#The_haversine_formula)
    """
    lat1, lon1 = from_tuple
    lat2, lon2 = to_tuple

    lat1 = float(lat1)
    lat2 = float(lat2)
    lon1 = float(lon1)
    lon2 = float(lon2)

    radius = 6371  # km

    dlat = math.radians(lat2 - lat1)
    dlon = math.radians(lon2 - lon1)
    a = math.sin(dlat / 2) * math.sin(dlat / 2) + math.cos(math.radians(lat1)) * \
        math.cos(math.radians(lat2)) * math.sin(dlon / 2) * math.sin(dlon / 2)
    c = 2 * math.atan2(math.sqrt(a), math.sqrt(1 - a))
    d = radius * c

    return d * 1000  # meters