如何在google map api中将path.td转换为经纬度数组？

// 创建Directions Service对象
var directionsService = new google.maps.DirectionsService();

// 创建Directions Renderer对象
var directionsRenderer = new google.maps.DirectionsRenderer();

// 将Directions Renderer与地图关联
directionsRenderer.setMap(map);

// 创建Directions Request对象
var request = {
  origin: '起点地址',
  destination: '终点地址',
  travelMode: 'DRIVING',
  waypoints: [
    {location: '途经点1地址'},
    {location: '途经点2地址'}
  ]
};

// 发送Directions Request请求
directionsService.route(request, function(response, status) {
  if (status === 'OK') {
    // 获取路径的经纬度数组
    var path = response.routes[0].overview_path;

    // 将路径的经纬度数组打印出来
    for (var i = 0; i < path.length; i++) {
      console.log('经度：' + path[i].lng());
      console.log('纬度：' + path[i].lat());
    }
  }
});