如何使用Java测试具有纬度/经度和半径的区域内的点? [英] How to test if a point inside area with lat/lon and radius using Java?

问题描述

我必须编写一个具有以下签名的方法

I've to write a method that has the following signature

public class Position {
double longitude;
double latitude;
}

boolean isInsideTheArea(Position center, double radius, Position point);

所以如果 point 位于以 center 为中心，radius 为半径的 area 内以英里为单位，这应该返回true，否则返回false.

So if point is inside the area that has the center as its center and radius as its radius in miles, this should return true, false otherwise.

推荐答案

使用 Haversine 公式来计算之间的距离center 和 point.如果距离大于radius，返回false；否则返回 true.

Use the Haversine formula to compute the distance between center and point. If that distance is greater than radius, return false; otherwise return true.

伪代码:

def haversineDistance(a, b):
    # snip...
    return foo

def isInsideTheArea (center, radius, point):
    return haversineDistance(center, point) <= radius

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