地图上(百度地图)获取两个坐标之间的直线距离

最新推荐文章于 2024-04-24 16:13:50 发布

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最新推荐文章于 2024-04-24 16:13:50 发布

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文章标签：百度地图坐标距离

本文链接：https://blog.youkuaiyun.com/qiangqiang_blog/article/details/50250093

本文介绍了一个用于计算地球上两点间实际距离的函数，采用Haversine公式进行计算，参数包括经度和纬度。

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function GetDistance($lat1, $lng1, $lat2, $lng2)
    {
        $earthRadius = 6367000; //approximate radius of earth in meters
        /*
        Convert these degrees to radians
        to work with the formula
        */
        $lat1 = ($lat1 * pi() ) / 180;
        $lng1 = ($lng1 * pi() ) / 180;

        $lat2 = ($lat2 * pi() ) / 180;
        $lng2 = ($lng2 * pi() ) / 180;
        /*
        Using the
        Haversine formula
        http://en.wikipedia.org/wiki/Haversine_formula
        calculate the distance
        */
        $calcLongitude = $lng2 - $lng1;
        $calcLatitude = $lat2 - $lat1;
        $stepOne = pow(sin($calcLatitude / 2), 2) + cos($lat1) * cos($lat2) * pow(sin($calcLongitude / 2), 2);
        $stepTwo = 2 * asin(min(1, sqrt($stepOne)));
        $calculatedDistance = $earthRadius * $stepTwo;
        echo round($calculatedDistance);

    }