.wxml：

<view class="map">
 <map 
     id="route_map" 
      latitude="{{latitude}}" 
      longitude="{{longitude}}" 
      style="height: 100%; width: 100%;" 
      polyline="{{polyline}}" 
      show-location="true">
 </map>
</view>
  


数据是从数据库中获取到的，下面是处理过程，打印信息。

.js：

//参数定义
data: {
    latitude: 39.7850456237793,
    longitude: 116.49617767333984,
    polyline: {
      points:[
        {Latitude: 39.7850456237793, Longitude: 116.49617767333984},
        {Latitude: 39.78499984741211, Longitude: 116.49617767333984},
        {Latitude: 39.78501892089844, Longitude: 116.49617767333984},
        {Latitude: 39.78501510620117, Longitude: 116.49617767333984},
        {Latitude: 39.78501892089844, Longitude: 116.49617767333984},
        {Latitude: 39.785003662109375, Longitude: 116.49617767333984},
        {Latitude: 39.785003662109375, Longitude: 116.4961929321289},
        {Latitude: 39.78498458862305, Longitude: 116.49620819091797},
        {Latitude: 39.785037994384766, Longitude: 116.49617004394531},
        {Latitude: 39.785011291503906, Longitude: 116.49617767333984},
        {Latitude: 39.78500747680664, Longitude: 116.49617767333984},
        {Latitude: 39.78498077392578, Longitude: 116.4961929321289},
        {Latitude: 39.78500747680664, Longitude: 116.49617767333984},
        {Latitude: 39.78501510620117, Longitude: 116.49617767333984},
        {Latitude: 39.78501510620117, Longitude: 116.4961929321289},
        {Latitude: 39.785125732421875, Longitude: 116.49617004394531},
        {Latitude: 39.7850227355957, Longitude: 116.4961929321289},
        {Latitude: 39.78496551513672, Longitude: 116.49620819091797},
        {Latitude: 39.78501510620117, Longitude: 116.4961929321289},
        {Latitude: 39.78501510620117, Longitude: 116.4961929321289},
        {Latitude: 39.78501510620117, Longitude: 116.4961929321289},
        {Latitude: 39.78504180908203, Longitude: 116.4961929321289},
        {Latitude: 39.78499984741211, Longitude: 116.4961929321289},
        {Latitude: 39.785003662109375, Longitude: 116.49620819091797},
        {Latitude: 39.7850341796875, Longitude: 116.49617767333984},
        {Latitude: 39.78496551513672, Longitude: 116.49620819091797},
        {Latitude: 39.78495407104492, Longitude: 116.49620819091797},
        {Latitude: 39.784976959228516, Longitude: 116.49620819091797},
        {Latitude: 39.78498458862305, Longitude: 116.49620819091797},
        {Latitude: 39.78496551513672, Longitude: 116.49620819091797},
      ],
    },
  },

//数据获取到后处理过程
success: function (res) { //成功获取到值，返回一个 res 对象。
        console.log(res);
        console.log("数据长度：", res.data.length)
        //判断是否没有对应的数据
        var data_len = res.data.length;
        if (data_len == 0) {
          wx.showToast({
            title: '未查到定位信息',
          })
          return
        } else {
          wx.showToast({
            title: '查询成功',
            icon: 'success'
          })
        }
        _this.setData({
          // 将路线的起点设置为地图中心点
          latitude:res.data[0].latitude,
          longitude:res.data[0].longitude,
          // 绘制路线
          polyline: {
            points: res.data,
            color: '#58c16c',
            width: 6,
            borderColor: '#2f693c',
            borderWidth: 1
          }
        })
        console.log("获取到的坐标：",_this.data.polyline)
      },
      fail: function () { //没有获取到值，说明这中间出问题了。
        console.log("获取失败");
      }
    })

//打印的调试信息



代码片段：https://developers.weixin.qq.com/s/tmfpabmK7VRz