導航

 
# 根據經度、緯度計算兩地距離：
def get_distance2(lat1, lon1, lat2, lon2):
    """獲取地理坐標系下的兩點間距離"""
    # GetDistanceInGeographyCoordinate, return two point distance
    radius_lat1 = lat1 * math.pi / 180
    radius_lat2 = lat2 * math.pi / 180
    radius_lon1 = lon1 * math.pi / 180
    radius_lon2 = lon2 * math.pi / 180
    a = radius_lat1 - radius_lat2
    b = radius_lon1 - radius_lon2
    distance = 2 * math.asin(math.sqrt(
        pow(math.sin(a / 2.0), 2) +
        math.cos(radius_lat1) * math.cos(radius_lat2) *
        pow(math.sin(b / 2.0), 2)))
 
    distance = distance * 6378137
    distance = distance - (distance * 0.0011194)
    return distance

#方位角
def get_bearing(lat1, lon1, lat2, lon2):
    dlon = lon2 - lon1
 
    y = math.sin(dlon) * math.cos(lat2)
    x = math.cos(lat1) * math.sin(lat2) - math.sin(lat1) * math.cos(lat2) * math.cos(dlon)
 
    bearing = math.atan2(y, x)
    bearing = np.degrees(bearing)
    bearing = (bearing + 360) % 360
 
    return bearing