Kml

<!--
  示例：加载 KML
  说明：一份内嵌的 KML 描述点、线与面，加载后自动生成实体
  核心逻辑：KmlDataSource.load(data URL) → 实体生成 → 相机定位
  依赖：CesiumJS 1.121 · jsDelivr CDN
-->
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta name="robots" content="noindex,follow">
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>加载 KML</title>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/cesium@1.121.0/Build/Cesium/Widgets/widgets.css">
<style>
  html,body{height:100%;margin:0}
  body{background:#0e1116;color:#e6e8ec;overflow:hidden;
       font:13px/1.6 -apple-system,"Segoe UI","PingFang SC",sans-serif}
  #c{height:100%}
  .tip{position:absolute;left:12px;top:12px;z-index:5;
       background:rgba(23,28,35,.9);border:1px solid #2a313b;border-radius:6px;
       padding:8px 12px;font-size:12px;color:#a2a9b6;max-width:320px;line-height:1.6}

  .cesium-viewer-bottom .cesium-widget-credits,.cesium-viewer-animationContainer,
  .cesium-viewer-timelineContainer{display:none!important}
</style>
</head>
<body>
<div id="c"></div>
<div class="tip">点、线、面都写在 KML 里，加载后是标准实体，可以继续拾取与编辑。</div>
<script src="https://cdn.jsdelivr.net/npm/cesium@1.121.0/Build/Cesium/Cesium.js"></script>
<script>
(function () {
  'use strict';

  var viewer = new Cesium.Viewer('c', {
    baseLayer: false,
    baseLayerPicker: false, geocoder: false, homeButton: false,
    sceneModePicker: false, navigationHelpButton: false,
    animation: false, timeline: false, fullscreenButton: false,
    infoBox: false, selectionIndicator: false
  });

  var scene = viewer.scene;
  scene.globe.baseColor = Cesium.Color.fromCssColorString('#1c2733');
  scene.backgroundColor = Cesium.Color.fromCssColorString('#0e1116');
  scene.skyBox.show = false;
  scene.sun.show = false;
  scene.moon.show = false;
  if (scene.skyAtmosphere) scene.skyAtmosphere.show = false;

  var kml = [
    '<?xml version="1.0" encoding="UTF-8"?>',
    '<kml xmlns="http://www.opengis.net/kml/2.2">',
    '<Document>',
    '<name>示例地标</name>',
    '<Style id="pin"><IconStyle><color>ff4d9bff</color><scale>1.1</scale></IconStyle></Style>',
    '<Placemark><name>起点</name><styleUrl>#pin</styleUrl>',
    '<Point><coordinates>116.3850,39.9020,0</coordinates></Point></Placemark>',
    '<Placemark><name>终点</name>',
    '<Point><coordinates>116.3940,39.9050,0</coordinates></Point></Placemark>',
    '<Placemark><name>路径</name>',
    '<LineString><tessellate>1</tessellate>',
    '<coordinates>116.3850,39.9020,0 116.3890,39.9042,0 116.3940,39.9050,0</coordinates>',
    '</LineString></Placemark>',
    '<Placemark><name>范围</name>',
    '<Polygon><outerBoundaryIs><LinearRing><coordinates>',
    '116.3860,39.9010,0 116.3885,39.9010,0 116.3885,39.9030,0 116.3860,39.9030,0 116.3860,39.9010,0',
    '</coordinates></LinearRing></outerBoundaryIs></Polygon></Placemark>',
    '</Document></kml>'
  ].join('');

  var dataUrl = 'data:application/vnd.google-earth.kml+xml;charset=utf-8,' + encodeURIComponent(kml);

  var ds = viewer.dataSources.add(Cesium.KmlDataSource.load(dataUrl));
  ds.then(function (dataSource) {
    viewer.zoomTo(dataSource, new Cesium.HeadingPitchRange(
      Cesium.Math.toRadians(0), Cesium.Math.toRadians(-40), 520
    ));
  }).catch(function (e) {
    console.error(e);
  });
  /* 相机在数据加载完成后由 zoomTo 设置 */
})();
</script>
</body>
</html>