计算经度和纬度的半径 [英] Calculating a radius with longitude and latitude

问题描述

我正在尝试确定两个位置(每个位置都有各自的纬度和经度值)是否在一定距离内，例如3英里半径内.我有两个值代表每个位置的纬度和经度.

I am trying to determine if two locations (each with their own latitude and longitude values) are within a certain distance of each other, a 3 mile radius for example. I have double values to represent the latitude and longitude of each location.

//Location 1
Double lattitude1 = 40.7143528;
Double longitude1 = -74.0059731;

//Location 2
Double lattitude2 = 33.325;
Double longitude2 = 44.422000000000025;

我想知道如何确定这两个位置是否在彼此的半径内，因为我不确定如何使用这种类型的值来做到这一点.

I am wondering how I would determine if these two locations are within each others radius or not because I am not entirely sure how to do this with this type of value.

推荐答案

请参见大圆圈距离

double CoordDistance(double latitude1, double longitude1, double latitude2, double longitude2)
{
    return 6371 * Math.acos(
        Math.sin(latitude1) * Math.sin(latitude2)
        + Math.cos(latitude1) * Math.cos(latitude2) * Math.cos(longitude2 - longitude1));
}

如果您的经度和纬度以度为单位，则将它们转换为弧度.

If your latitude and longitude are in degrees convert them to radians.

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