vue 高德地图使用热力图

点击+(放大地图),-(缩小地图)，点击热力图，弹出标牌。

需求：点击+(放大地图),-(缩小地图)，点击热力图，弹出标牌。

方法：先加载出来热力图，然后加载circleMarker信息弹窗叠加在热力图上。

代码

• 在public/index.html中的body模块中加入：

key值查询方法：登录高德开放平台，链接：key值查询

• 在新建的.vue中的代码：

export default {
  data() {
    return {
      currentMap: null,
      mapList: [
        {
          position: [120.168083, 30.239672], //经纬度
          icon: 1,
          qu: "清河坊历史文化特色街区", //区域名称
          nums: 100, //流入人员数量
        },
        {
          position: [120.163033, 30.238953],
          icon: 2,
          qu: "吴山景区吴山广场",
          nums: 55,
        },
        {
          position: [120.13026, 30.25961],
          icon: 3,
          qu: "杭州西湖风景名胜区",
          nums: 155,
        },
        {
          position: [120.227882, 30.26856],
          icon: 4,
          qu: "江和美海洋公园",
          nums: 205,
        },
        {
          position: [120.21201, 30.2084],
          icon: 5,
          qu: "鼓楼",
          nums: 315,
        },
        {
          position: [120.214523, 30.243525],
          icon: 6,
          qu: "城市阳台",
          nums: 466,
        },
        {
          position: [120.151657, 30.211077],
          icon: 7,
          qu: "八卦田遗址公园",
          nums: 555,
        },
        {
          position: [120.172874, 30.237242],
          icon: 8,
          qu: "胡雪岩旧居",
          nums: 86,
        },
        {
          position: [120.175888, 30.239679],
          icon: 9,
          qu: "五柳巷历史街区",
          nums: 135,
        },
      ],
    };
  },
  mounted() {
    setTimeout(() => {
      this.initMap();
    }, 300);
  },
  methods: {
    initMap() {
      var map = new AMap.Map("container", {
        // center: [108.939645, 34.314207], //西安未央路
        center: [120.141409, 30.319025], //杭州市拱墅区人民政府
        // layers: [new AMap.TileLayer.Satellite(),new AMap.TileLayer.RoadNet()],
        layers: [],
        mapStyle: "amap://styles/659e7a0818b4892e919457b29948695c",
        zoom: 11.1,
      });
      this.currentMap = map;
      
      var heatmap;
      var points =[
        { "lng": 120.168083, "lat": 30.239672, "count": 80 },
        { "lng": 120.163033, "lat": 30.238953, "count": 81 },
        { "lng": 120.13026, "lat": 30.25961, "count": 82 },
        { "lng": 120.227882, "lat": 30.26856, "count": 93 },
        { "lng": 120.21201, "lat": 30.2084, "count": 84 },
        { "lng": 120.214523, "lat": 30.243525, "count": 85 },
        { "lng": 120.151657, "lat": 30.211077, "count": 86 },
        { "lng": 120.172874, "lat": 30.237242, "count": 87 },
        { "lng": 120.175888, "lat": 30.239679, "count": 88 },
      ];
      
      map.plugin(["AMap.HeatMap"],function() {      //加载热力图插件
        //在地图对象叠加热力图
        heatmap = new AMap.HeatMap(map, {
          radius: 100, // 热力图中单个点的半径，默认：30，单位：pixel
          opacity: [0, 0.8], // 热力图透明度数组，取值范围[0,1]，0表示完全透明，1表示不透明，默认：[0,1]
          // 热力图的渐变区间，热力图按照设置的颜色及间隔显示热力图
          gradient:{
            0.5: 'blue',
            0.65: 'rgb(117,211,248)',
            0.7: 'rgb(0, 255, 0)',
            0.9: '#ffea00',
            1.0: 'red'
          }
        });
        heatmap.setDataSet({data:points,max:100}); //设置热力图数据集
      });

      var infoWindow = new AMap.InfoWindow({
        offset: new AMap.Pixel(0, -40),
      });

      for (var i = 0; i < this.mapList.length; i += 1) {
        var center = this.mapList[i].position;
        // 根据nums的大小添加不同颜色及大小的圆
        if (this.mapList[i].nums > 500) {
          var circleRadius = 25;
          var circleColr = "";
        } else if (this.mapList[i].nums > 400 && this.mapList[i].nums <= 500) {
          var circleRadius = 22;
          var circleColr = "";
        } else if (this.mapList[i].nums > 300 && this.mapList[i].nums <= 400) {
          var circleRadius = 19;
          var circleColr = "";
        } else if (this.mapList[i].nums > 200 && this.mapList[i].nums <= 300) {
          var circleRadius = 16;
          var circleColr = "";
        } else if (this.mapList[i].nums > 100 && this.mapList[i].nums <= 200) {
          var circleRadius = 13;
          var circleColr = "";
        } else if (this.mapList[i].nums > 50 && this.mapList[i].nums <= 100) {
          var circleRadius = 10;
          var circleColr = "";
        } else if (this.mapList[i].nums > 0 && this.mapList[i].nums <= 50) {
          var circleRadius = 7;
          var circleColr = "";
        }

        // 将圆点标记添加到地图上
        var circleMarker = new AMap.CircleMarker({
          center: center,
          radius: circleRadius, //3D视图下，CircleMarker半径不要超过64px
          strokeColor: circleColr,
          strokeWeight: 2,
          strokeOpacity: 0.5,
          // fillColor:circleColr,
          fillColor: "rgba(0,0,0, 0.1)",
          fillOpacity: 0.5,
          zIndex: 10,
          bubble: true,
          cursor: "pointer",
          clickable: true,
        });
        circleMarker.setMap(map);

        //信息窗体内容及点击事件
        circleMarker.content = `

                    
${this.mapList[i].qu}
                    

                        

                        
流入人员：
                        
${this.mapList[i].nums}
                    
                
`;
        //鼠标点击marker弹出自定义的信息窗体
        circleMarker.on("click", markerClick);
      }
      function markerClick(e) {
        infoWindow.setContent(e.target.content);
        infoWindow.open(map, e.target.getCenter());
      }
    },
    // 放大
    setBigView() {
      this.currentMap.zoomIn();
    },
    // 缩小
    setSmallView() {
      this.currentMap.zoomOut();
    },
  },
  components: {},
  beforeDestroy() {},
};