python - 如何检查特定区域内Python的坐标

Question

假设我有两种坐标，第一种称为 center_point，第二种称为 test_point。我想通过应用 radius 阈值知道 test_point 坐标是否在 center_point 坐标附近。如果我写它，它就像:

center_point = [{'lat': -7.7940023, 'lng': 110.3656535}]
test_point = [{'lat': -7.79457, 'lng': 110.36563}]

radius = 5 # in kilometer

如何在 Python 中检查 test_point 是在 center_point 半径内还是半径外？我如何在 Python 中执行此类任务？

预期结果将说明 test_point 在 center_point 坐标的 radius 之内或之外。

Answer 1

根据@user1753919 在他/她的评论中的推荐，我在这里得到了答案:Haversine Formula in Python (Bearing and Distance between two GPS points)

最终代码:

from math import radians, cos, sin, asin, sqrt

def haversine(lon1, lat1, lon2, lat2):
    """
    Calculate the great circle distance between two points 
    on the earth (specified in decimal degrees)
    """
    # convert decimal degrees to radians 
    lon1, lat1, lon2, lat2 = map(radians, [lon1, lat1, lon2, lat2])

    # haversine formula 
    dlon = lon2 - lon1 
    dlat = lat2 - lat1 
    a = sin(dlat/2)**2 + cos(lat1) * cos(lat2) * sin(dlon/2)**2
    c = 2 * asin(sqrt(a)) 
    r = 6371 # Radius of earth in kilometers. Use 3956 for miles
    return c * r

center_point = [{'lat': -7.7940023, 'lng': 110.3656535}]
test_point = [{'lat': -7.79457, 'lng': 110.36563}]

lat1 = center_point[0]['lat']
lon1 = center_point[0]['lng']
lat2 = test_point[0]['lat']
lon2 = test_point[0]['lng']

radius = 1.00 # in kilometer

a = haversine(lon1, lat1, lon2, lat2)

print('Distance (km) : ', a)
if a <= radius:
    print('Inside the area')
else:
    print('Outside the area')

谢谢