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arcgis for js实现层叠立体效果

article 2025/2/12 11:59:52

在 Web 开发中，利用 ArcGIS for JS 实现一些炫酷的地图效果能够极大地提升用户体验。本文将详细介绍如何使用 ArcGIS for JS 实现层叠立体效果，并展示最终的效果图。

效果图

在这里插入图片描述

实现思路

要实现层叠立体效果，关键在于获取边界图形的坐标，然后对这些坐标进行多次平移操作，从而创建出多个多边形。这些多边形会从下至上层层覆盖，最终营造出立体的视觉效果。最后，我们将加载区域天地图作为底图，使整个效果更加完整。

实现代码

html代码, 复制运行即可

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>我不当帕鲁谁当帕鲁</title>

    <style>
      html,
      body {
        width: 100%;
        height: 100%;
        background: #000;
      }
      * {
        margin: 0;
        padding: 0;
      }

      body {
        background: linear-gradient(135deg, rgba(16, 101, 91, 1) 0%, rgba(16, 101, 91, 0.2) 100%);
      }

      #mapView {
        position: absolute;
        width: 100%;
        height: 100%;
      }
    </style>

    <!-- <script src="https://cdn.jsdelivr.net/npm/@turf/turf@7/turf.min.js"></script> -->
    <script src="https://cdnjs.cloudflare.com/ajax/libs/Turf.js/6.5.0/turf.min.js"></script>
    <link rel="stylesheet" href="https://js.arcgis.com/4.23/esri/themes/light/main.css" />
    <script src="https://js.arcgis.com/4.23/"></script>
  </head>
  <body>
    <!-- 地图容器 -->
    <div id="mapView"></div>

    <script>
      require([
        'esri/Map',
        'esri/views/MapView',
        'esri/Basemap',
        'esri/layers/WebTileLayer',
        'esri/layers/GroupLayer',
        'esri/layers/GeoJSONLayer',
        'esri/layers/GraphicsLayer',
        'esri/Graphic'
      ], function (
        Map,
        MapView,
        Basemap,
        WebTileLayer,
        GroupLayer,
        GeoJSONLayer,
        GraphicsLayer,
        Graphic
      ) {
        var tiandituBaseUrl = 'http://{subDomain}.tianditu.gov.cn' // 天地图服务地址
        var token = 'b5a612fc171599a0f5c51aa03efd4948' // 私人天地图token, 地图加载不出来的话就换成自己的

        // 天地图底图
        var imgLayer = new WebTileLayer({
          urlTemplate:
            tiandituBaseUrl + '/DataServer?T=img_w/wmts&x={col}&y={row}&l={level}&tk=' + token,
          subDomains: ['t0', 't1', 't2', 't3', 't4', 't5', 't6', 't7'],
          copyright: '天地图影像图'
        })
        var ciaLayer = new WebTileLayer({
          urlTemplate:
            tiandituBaseUrl +
            '/DataServer?T=cia_w?T=vec_c/wmts&x={col}&y={row}&l={level}&tk=' +
            token,
          subDomains: ['t0', 't1', 't2', 't3', 't4', 't5', 't6', 't7'],
          copyright: '天地图影像注记'
        })
        var vecBasemap = new Basemap({
          baseLayers: [imgLayer, ciaLayer],
          title: '影像图',
          id: 'img_w',
          thumbnailUrl:
            'https://services.arcgisonline.com/arcgis/rest/services/World_Imagery/MapServer/tile/0/0/0'
        })

        // 初始化底图
        const map = new Map({
          basemap: vecBasemap // 指定一个底图
          // basemap: 'dark-gray-vector'
        })

        // 创建2维视图
        let view = new MapView({
          container: 'mapView',
          map: map,
          zoom: 9, // 初始化级别
          center: [103.93347958618153, 30.9146073004904] // 初始化中心点坐标
        })

        // 添加点击
        view.on('click', function (e) {
          console.log('>>> 点击的坐标: ')
          console.log(`${e.mapPoint.longitude}, ${e.mapPoint.latitude}`)
        })

        view.when(async () => {
          // 去除原本底图
          // map.basemap = null

          // 边界线
          const boundaryLineLayer = new GeoJSONLayer({
            url: 'https://geo.datav.aliyun.com/areas_v3/bound/510100.json',
            outFields: ['*'],
            renderer: {
              type: 'simple',
              symbol: {
                type: 'simple-line',
                color: '#B1E4B1',
                width: 2
              }
            }
          })

          // 获取边界图形
          const { features } = await boundaryLineLayer.queryFeatures()
          const rings = features[0].geometry.rings // 拿到最大的区域坐标

          // 装扩展边界的图形图层
          const extendLayer = new GraphicsLayer({ title: '扩展边界图层' })
          map.add(extendLayer)

          const colors = ['#106B5A', '#118971', '#0CAE8A', '#15C99E']
          for (let i = 0; i <= 3; i++) {
            const poly = turf.polygon(rings) // 转为turf多边形

            // 向下平移的距离, 必须是从下至上的顺序
            let distance = -8 + 2 * i

            const translatedPoly = turf.transformTranslate(poly, distance, 350)

            const graphic = new Graphic({
              geometry: {
                type: 'polygon',
                rings: translatedPoly.geometry.coordinates[0]
              },
              symbol: {
                type: 'simple-fill',
                color: colors[i],
                outline: {
                  width: 0,
                  color: '#7BD6F4'
                }
              }
            })
            extendLayer.add(graphic)
          }

          // 范围内的高亮地图
          const areaLayer = new GroupLayer({
            layers: [
              imgLayer,
              ciaLayer,
              new GeoJSONLayer({
                url: 'https://geo.datav.aliyun.com/areas_v3/bound/510100.json',
                blendMode: 'destination-in',
                outFields: ['*'],
                renderer: {
                  type: 'simple',
                  symbol: {
                    type: 'simple-fill',
                    color: [227, 139, 79, 1],
                    outline: {
                      color: [0, 122, 204, 0.8],
                      width: 2
                    }
                  }
                }
              })
            ]
          })

          // 边界线和蒙层图层最后加载, 使其在最上层
          map.add(areaLayer)
          map.add(boundaryLineLayer)
        })
      })
    </script>
  </body>
</html>