给定纬度和经度（以度为单位），找出地球上两点之间的距离。
图片来源：维基百科
例子：
Input : Latitude 1: 53.32055555555556
Latitude 2: 53.31861111111111
Longitude 1: -1.7297222222222221
Longitude 2: -1.6997222222222223
Output: Distance is: 2.0043678382716137 Kilometers问题可以使用Haversine公式解决：
大圆距离或正交距离是球体（或地球表面）上两点之间的最短距离。为了使用这种方法，我们需要有A点和B点的坐标。选择大圆法而不是其他方法。
首先，将纬度和经度值从十进制度数转换为弧度。为此，将两个点的经度和纬度值除以 180/pi。 pi 的值为 22/7。 180/pi 的值约为 57.29577951。如果我们要计算两地之间的距离（以英里为单位），请使用值 3，即 963，即地球的半径。如果我们想以千米为单位计算两个地方之间的距离，请使用值 6，即 378.8，即地球的半径。
Find the value of the latitude in radians:
Value of Latitude in Radians, lat = Latitude / (180/pi) OR
Value of Latitude in Radians, lat = Latitude / 57.29577951
Find the value of longitude in radians:
Value of Longitude in Radians, long = Longitude / (180/pi) OR
Value of Longitude in Radians, long = Longitude / 57.29577951
获取A点的经纬度坐标。使用上述转换方法将纬度和经度的值转换为弧度。我将其称为 lat1 和 long1。对 B 点的坐标做同样的事情，得到 lat2 和 long2。
现在，要获得 A 点和 B 点之间的距离，请使用以下公式：
Distance, d = 3963.0 * arccos[(sin(lat1) * sin(lat2)) + cos(lat1) * cos(lat2) * cos(long2 – long1)]
获得的距离 d 以英里为单位。如果您希望您的值以公里为单位，则将 d 乘以 1.609344。
d 公里 = 1.609344 * d 英里
因此，您可以使用大圆距离方法获得地球上两个地方之间的最短距离。
C++
// C++ program to calculate Distance
// Between Two Points on Earth
#include
using namespace std;
// Utility function for
// converting degrees to radians
long double toRadians(const long double °ree)
{
// cmath library in C++
// defines the constant
// M_PI as the value of
// pi accurate to 1e-30
long double one_deg = (M_PI) / 180;
return (one_deg * degree);
}
long double distance(long double lat1, long double long1,
long double lat2, long double long2)
{
// Convert the latitudes
// and longitudes
// from degree to radians.
lat1 = toRadians(lat1);
long1 = toRadians(long1);
lat2 = toRadians(lat2);
long2 = toRadians(long2);
// Haversine Formula
long double dlong = long2 - long1;
long double dlat = lat2 - lat1;
long double ans = pow(sin(dlat / 2), 2) +
cos(lat1) * cos(lat2) *
pow(sin(dlong / 2), 2);
ans = 2 * asin(sqrt(ans));
// Radius of Earth in
// Kilometers, R = 6371
// Use R = 3956 for miles
long double R = 6371;
// Calculate the result
ans = ans * R;
return ans;
}
// Driver Code
int main()
{
long double lat1 = 53.32055555555556;
long double long1 = -1.7297222222222221;
long double lat2 = 53.31861111111111;
long double long2 = -1.6997222222222223;
// call the distance function
cout << setprecision(15) << fixed;
cout << distance(lat1, long1,
lat2, long2) << " K.M";
return 0;
}
// This code is contributed
// by Aayush Chaturvedi Java
// Java program to calculate Distance Between
// Two Points on Earth
import java.util.*;
import java.lang.*;
class GFG {
public static double distance(double lat1,
double lat2, double lon1,
double lon2)
{
// The math module contains a function
// named toRadians which converts from
// degrees to radians.
lon1 = Math.toRadians(lon1);
lon2 = Math.toRadians(lon2);
lat1 = Math.toRadians(lat1);
lat2 = Math.toRadians(lat2);
// Haversine formula
double dlon = lon2 - lon1;
double dlat = lat2 - lat1;
double a = Math.pow(Math.sin(dlat / 2), 2)
+ Math.cos(lat1) * Math.cos(lat2)
* Math.pow(Math.sin(dlon / 2),2);
double c = 2 * Math.asin(Math.sqrt(a));
// Radius of earth in kilometers. Use 3956
// for miles
double r = 6371;
// calculate the result
return(c * r);
}
// driver code
public static void main(String[] args)
{
double lat1 = 53.32055555555556;
double lat2 = 53.31861111111111;
double lon1 = -1.7297222222222221;
double lon2 = -1.6997222222222223;
System.out.println(distance(lat1, lat2,
lon1, lon2) + " K.M");
}
}
// This code is contributed by Prasad KshirsagarPython3
# Python 3 program to calculate Distance Between Two Points on Earth
from math import radians, cos, sin, asin, sqrt
def distance(lat1, lat2, lon1, lon2):
# The math module contains a function named
# radians which converts from degrees to radians.
lon1 = radians(lon1)
lon2 = radians(lon2)
lat1 = radians(lat1)
lat2 = radians(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))
# Radius of earth in kilometers. Use 3956 for miles
r = 6371
# calculate the result
return(c * r)
# driver code
lat1 = 53.32055555555556
lat2 = 53.31861111111111
lon1 = -1.7297222222222221
lon2 = -1.6997222222222223
print(distance(lat1, lat2, lon1, lon2), "K.M")C#
// C# program to calculate
// Distance Between Two
// Points on Earth
using System;
class GFG
{
static double toRadians(
double angleIn10thofaDegree)
{
// Angle in 10th
// of a degree
return (angleIn10thofaDegree *
Math.PI) / 180;
}
static double distance(double lat1,
double lat2,
double lon1,
double lon2)
{
// The math module contains
// a function named toRadians
// which converts from degrees
// to radians.
lon1 = toRadians(lon1);
lon2 = toRadians(lon2);
lat1 = toRadians(lat1);
lat2 = toRadians(lat2);
// Haversine formula
double dlon = lon2 - lon1;
double dlat = lat2 - lat1;
double a = Math.Pow(Math.Sin(dlat / 2), 2) +
Math.Cos(lat1) * Math.Cos(lat2) *
Math.Pow(Math.Sin(dlon / 2),2);
double c = 2 * Math.Asin(Math.Sqrt(a));
// Radius of earth in
// kilometers. Use 3956
// for miles
double r = 6371;
// calculate the result
return (c * r);
}
// Driver code
static void Main()
{
double lat1 = 53.32055555555556;
double lat2 = 53.31861111111111;
double lon1 = -1.7297222222222221;
double lon2 = -1.6997222222222223;
Console.WriteLine(distance(lat1, lat2,
lon1, lon2) + " K.M");
}
}
// This code is contributed by
// Manish Shaw(manishshaw1)PHP
Javascript
输出：
2.0043678382716137 K.M参考：维基百科
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