js根據經緯度座標計算兩點之間的距離

getDistance: (lat1, lng1, lat2, lng2) => {
    var radLat1 = lat1 * Math.PI / 180.0
    var radLat2 = lat2 * Math.PI / 180.0
    var a = radLat1 - radLat2
    var b = lng1 * Math.PI / 180.0 - lng2 * Math.PI / 180.0
    var s = 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(a / 2), 2) +
    Math.cos(radLat1) * Math.cos(radLat2) * Math.pow(Math.sin(b / 2), 2)))
    s = s * 6378.137// EARTH_RADIUS;
    s = Math.round(s * 10000) / 10000
    return s
}