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特定の領域内の座標を確認する方法Python

最初にcenter_pointと呼ばれ、次にtest_pointと呼ばれる2種類の座標があるとします。 radiusしきい値を適用して、test_point座標がcenter_point座標に近いかどうかを知りたい。私がそれを書くと、そのようになります:

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

radius = 5 # in kilometer

Pythonでtest_pointからの半径の内側または外側にcenter_pointがあるかどうかを確認するにはどうすればよいですか? Pythonでこの種のタスクを実行するにはどうすればよいですか?

予想される結果は、test_point座標からのradiusの内側または外側にcenter_pointと表示されます。

12
ytomo

コメントの@ user1753919の推奨から、私はここで答えを得ました: Haversine Formula in Python(Bearing and Distance between two GPS points)

最終コード:

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')

ありがとう

18
ytomo
from math import sqrt
a = center_point[0]['lat'] - test_point[0]['lat']
b = center_point[0]['lng'] - test_point[0]['lng']
c = sqrt(a * a  +  b * b)
if (c < radius):
        print("inside")
else:
        print("outside")
2
Egor

GeoPy はそれを正常に処理できます:

from geopy import distance

center_point = [{'lat': -7.7940023, 'lng': 110.3656535}]
test_point = [{'lat': -7.79457, 'lng': 110.36563}]
radius = 5 # in kilometer

center_point_Tuple = Tuple(center_point[0].values()) # (-7.7940023, 110.3656535)
test_point_Tuple = Tuple(test_point[0].values()) # (-7.79457, 110.36563)

dis = distance.distance(center_point_Tuple, test_point_Tuple).km
print("Distance: {}".format(dis)) # Distance: 0.0628380925748918

if dis <= radius:
    print("{} point is inside the {} km radius from {} coordinate".format(test_point_Tuple, radius, center_point_Tuple))
else:
    print("{} point is outside the {} km radius from {} coordinate".format(test_point_Tuple, radius, center_point_Tuple))

または、大圏の距離を知る必要がある場合:

dis = distance.great_circle(center_point_Tuple, test_point_Tuple).km
print("Distance: {}".format(dis)) # Distance: 0.0631785164583489
1
Igor-S