前言

在前端开发中，地图展示是常见的需求之一。而高德地图作为国内知名的地图服务商，其提供的 API 功能丰富，使用也相对简单。

本篇文章将介绍如何在 Vue2 中使用 @amap/amap-jsapi-loader 安装高德地图并展示地图。

准备工作

首先需要在高德开放平台注册账号，并创建一个应用获取相应的应用 key。
安装 @amap/amap-jsapi-loader。

npm install @amap/amap-jsapi-loader

使用

  // 初始化高德地图
  mounted() {
    AMapLoader.load({
      key: "你的应用 key",
      version: "2.0",
      plugins: ["AMap.Scale", "AMap.OverView", "AMap.ToolBar", "AMap.MapType"],
      Loca: {
        version: "2.0",
      },
    }).then((AMap) => {
      this.initMap(AMap);
    });
  },
  methods: {
    initMap(AMap) {
      this.map = new AMap.Map("mapContainer", {
        viewMode: "3D", //开启3D视图,默认为关闭
        mapStyle: "amap://styles/darkblue",//主题样式
        zoom: 10,
        center: [116.397428, 39.90923],
      });
    },
  },

2D多边形立体效果

这里介绍一种工具GeoJSON。

1.在地图上选取要素类型（点、线、面等），并使用鼠标在地图上画出要素形状。

2.在右侧面板中可以看到生成的GeoJSON数据，包括要素类型、坐标信息和属性信息。

比如说这样一个图形

我们画好获取到他的点之后在代码中绘制

const pathPos = [
  {
    point: [
      [95.50358686014329, 29.919373253410868],
      [95.50256641846386, 29.91972649467766],
      [95.50053154990024, 29.920407889723833],
      [95.49566282916277, 29.922062194380487],
      [95.4954304901953, 29.921596007328503],
      [95.50230405502856, 29.91927886419461],
      [95.50174713134766, 29.918172713504486],
      [95.5009011032626, 29.91692351110885],
      [95.49447942199674, 29.91908778583877],
      [95.4942831669282, 29.91861842590066],
      [95.50071476626823, 29.916446908047305],
      [95.49728739203402, 29.911522353660644],
      [95.49810791015625, 29.91107177734375],
      [95.50173653782093, 29.916105035072235],
      [95.50948951439364, 29.913471468464593],
      [95.5096392976834, 29.913965572980317],
      [95.50200937406373, 29.91652722100838],
      [95.50334996945577, 29.918886668898267],
      [95.51045504489969, 29.91652391201069],
      [95.51067844600743, 29.91698476840213],
      [95.50358686014329, 29.919373253410868],
    ],
  },
  {
    point: [
      [95.50354394479908, 29.91961502670651],
      [95.50252350311965, 29.919968267115472],
      [95.50048863455604, 29.920649660506953],
      [95.49561991381856, 29.922303961146138],
      [95.4953875748511, 29.921837775226294],
      [95.50226113968435, 29.91952063771944],
      [95.5008581879184, 29.917165290353125],
      [95.49443650665253, 29.919329559827638],
      [95.49424025158399, 29.918860201029265],
      [95.50067185092402, 29.91668868844885],
      [95.49724447668981, 29.911764146018857],
      [95.49806499481204, 29.911313570795876],
      [95.50169362247674, 29.91634681630389],
      [95.50944659904944, 29.913713256090627],
      [95.5095963823392, 29.91420735940669],
      [95.50196645871952, 29.916769001214917],
      [95.50330705411157, 29.919128443375513],
      [95.51041212955549, 29.916765692225262],
      [95.51063553066322, 29.91722654749765],
      [95.50354394479908, 29.91961502670651],
    ],
  },
  {
    point: [
      [95.50352248712694, 29.919968386620923],
      [95.50250204544751, 29.92032162577616],
      [95.50046717688392, 29.921003016749225],
      [95.49559845614642, 29.922657311516648],
      [95.49536611717896, 29.92219112725151],
      [95.50223968201222, 29.919873997968878],
      [95.50083673024626, 29.917518658961775],
      [95.4944150489804, 29.919682920755196],
      [95.49421879391186, 29.919213563622648],
      [95.50065039325189, 29.917042058748894],
      [95.49722301901768, 29.912117533794117],
      [95.49804353713992, 29.91166696016994],
      [95.50167216480462, 29.9167001878172],
      [95.5094251413773, 29.914066636949627],
      [95.50957492466708, 29.914560738512343],
      [95.50194500104739, 29.917122371229958],
      [95.50328559643944, 29.919481805016893],
      [95.51039067188336, 29.91711906225206],
      [95.51061407299109, 29.917579915888904],
      [95.50352248712694, 29.919968386620923],
    ],
  },
];

通过遍历pathPos画多边形

      pathPos.forEach((item, index) => {
        const polygon = new this.AMapObj.Polygon({
        path: item.point,
        fillColor: "#12447d", // 多边形填充颜色
        strokeWeight: 2, // 线条宽度，默认为 1
        strokeColor: "#027aff", // 线条颜色
        fillOpacity: 0.5, // 透明度
        strokeStyle: "dashed", //虚线
        strokeDasharray: [10, 10],
      });
      this.baseMapShp.push(polygon);
      });
      this.map.add(this.baseMapShp);

3D多边形立体效果

北京公交线路-线图层-示例详情-Loca API 2.0 | 高德地图API (amap.com)

使用Loca API

 const json={
  type: "FeatureCollection",
  features: [
    {
      type: "Feature",
      properties: {
        type: 1,
        h: 1,
      },
      geometry: {
        type: "LineString",
        coordinates: [
          [95.503586860143287, 29.919373253410868],
          [95.502566418463857, 29.919726494677661],
          [95.500531549900245, 29.920407889723833],
          [95.495662829162768, 29.922062194380487],
          [95.495430490195304, 29.921596007328503],
          [95.50230405502856, 29.919278864194609],
          [95.500901103262606, 29.916923511108848],
          [95.494479421996743, 29.919087785838769],
          [95.494283166928199, 29.918618425900661],
          [95.500714766268231, 29.916446908047305],
          [95.497287392034025, 29.911522353660644],
          [95.49810791015625, 29.91107177734375],
          [95.501736537820932, 29.916105035072235],
          [95.509489514393636, 29.913471468464593],
          [95.509639297683407, 29.913965572980317],
          [95.502009374063732, 29.91652722100838],
          [95.503349969455769, 29.918886668898267],
          [95.510455044899686, 29.916523912010689],
          [95.510678446007432, 29.916984768402131],
          [95.503586860143287, 29.919373253410868],
        ],
      },
    },
    {
      type: "Feature",
      properties: {
        type: 2,
        h: 2,
      },
      geometry: {
        type: "LineString",
        coordinates: [
          [95.503586860143287, 29.919373253410868],
          [95.502566418463857, 29.919726494677661],
          [95.500531549900245, 29.920407889723833],
          [95.495662829162768, 29.922062194380487],
          [95.495430490195304, 29.921596007328503],
          [95.50230405502856, 29.919278864194609],
          [95.500901103262606, 29.916923511108848],
          [95.494479421996743, 29.919087785838769],
          [95.494283166928199, 29.918618425900661],
          [95.500714766268231, 29.916446908047305],
          [95.497287392034025, 29.911522353660644],
          [95.49810791015625, 29.91107177734375],
          [95.501736537820932, 29.916105035072235],
          [95.509489514393636, 29.913471468464593],
          [95.509639297683407, 29.913965572980317],
          [95.502009374063732, 29.91652722100838],
          [95.503349969455769, 29.918886668898267],
          [95.510455044899686, 29.916523912010689],
          [95.510678446007432, 29.916984768402131],
          [95.503586860143287, 29.919373253410868],
        ],
      },
    },
  ],
};

      let geo = new Loca.GeoJSONSource({
        data: json,
      });
      let ll = new Loca.LineLayer({
        loca,
      });
      let colors = ['#f7fcf5', '#e5f5e0'];
      ll.setSource(geo, {
        color: function (index, feature) {
          var i = index % colors.length;
          return colors[i];
        },
        lineWidth: (index, feature) => {
          return 2;
        },
        altitude: function (index, feature) {
          return 100 * index;
        },
        dash: function (index, feature) {
          return [10];
        },
      });