我正在使用GPS和Arduino创建地理围栏。我想使用Haversine公式找到两点之间的距离,以便与半径计算。问题是我很难在Arduino IDE上实现Haversine公式,因为我是相对初学者。
a = sin²(Δφ/2) + cos(φ1).cos(φ2).sin²(Δλ/2)
c = 2.atan2(√a, √(1−a))
d = R.c
如何在Arduino IDE上实现上述公式?
我正在使用GPS和Arduino创建地理围栏。我想使用Haversine公式找到两点之间的距离,以便与半径计算。问题是我很难在Arduino IDE上实现Haversine公式,因为我是相对初学者。
a = sin²(Δφ/2) + cos(φ1).cos(φ2).sin²(Δλ/2)
c = 2.atan2(√a, √(1−a))
d = R.c
1 degrees aproximates to 111.32 km at equator.
96.41km at 30 degrees N/S
78.71 km at 45 degrees N/S
55.66 km at 60 degrees N/S
28.82 km at 75 degrees N/S
R = 6371;km
lat/lng in radians
var x = (lng2-lng1) * cos((lat1+lat2)/2);
var y = (lat2-lat1);
var dist = sqrt(x*x + y*y) * R;
coordinates = (0,0) to (1,0) Haversine 157.293809 km Equirectangular 157.294807 km
coordinates = (10,0) to (11,0) Haversine 155.985273 km Equirectangular 155.986379 km
coordinates = (20,0) to (21,0) Haversine 152.397156 km Equirectangular 152.39855 km
coordinates = (30,0) to (31,0) Haversine 146.81715 km Equirectangular 146.818975 km
coordinates = (40,0) to (41,0) Haversine 139.728101 km Equirectangular 139.730447 km
coordinates = (50,0) to (51,0) Haversine 131.817706 km Equirectangular 131.820603 km
coordinates = (60,0) to (61,0) Haversine 123.976838 km Equirectangular 123.980256 km
coordinates = (70,0) to (71,0) Haversine 117.255674 km Equirectangular 117.259525 km
coordinates = (80,0) to (81,0) Haversine 112.726966 km Equirectangular 112.731106 km