Custom Geocoder

<!--
  示例：用本地城市表实现自定义地理编码
  说明：只实现 geocode(input) 一个方法，返回 displayName 与 destination 数组
  核心逻辑：new Viewer({ geocoder: service }) → 搜索框输入城市名 → 相机定位
  依赖：CesiumJS 1.121 · jsDelivr CDN，不请求任何在线地理编码服务
-->
<!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>自定义地理编码</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%}
  .hud{position:absolute;left:12px;top:12px;z-index:5;background:rgba(23,28,35,.9);
       border:1px solid #2a313b;border-radius:6px;padding:9px 12px;font-size:12px;
       color:#a2a9b6;max-width:250px}
  .hud b{color:#e6e8ec;font-weight:600}
  .hud .row{margin-top:7px}
  .cesium-viewer-bottom .cesium-widget-credits,.cesium-viewer-animationContainer,
  .cesium-viewer-timelineContainer{display:none!important}
</style>
</head>
<body>
<div id="c"></div>
<div class="hud">
  <div><b>自定义地理编码</b></div>
  <div class="row">右上角搜索框输入城市名试试</div>
  <div class="row">可用：北京、上海、广州、成都、西安、乌鲁木齐、拉萨、哈尔滨</div>
</div>
<script src="https://cdn.jsdelivr.net/npm/cesium@1.121.0/Build/Cesium/Cesium.js"></script>
<script>
(function () {
  'use strict';

  var CITIES = [
    { name: '北京', lon: 116.391, lat: 39.907 },
    { name: '上海', lon: 121.474, lat: 31.230 },
    { name: '广州', lon: 113.264, lat: 23.129 },
    { name: '成都', lon: 104.067, lat: 30.572 },
    { name: '西安', lon: 108.948, lat: 34.342 },
    { name: '乌鲁木齐', lon: 87.617, lat: 43.826 },
    { name: '拉萨', lon: 91.132, lat: 29.660 },
    { name: '哈尔滨', lon: 126.642, lat: 45.757 },
    { name: '武汉', lon: 114.305, lat: 30.593 },
    { name: '昆明', lon: 102.712, lat: 25.045 }
  ];

  /* ---------- 自定义 GeocoderService：只有 geocode 一个方法 ---------- */
  var localGeocoder = {
    geocode: function (input) {
      var q = String(input || '').trim();
      if (!q) return Promise.resolve([]);

      var hits = CITIES.filter(function (c) {
        return c.name.indexOf(q) !== -1;
      });

      return Promise.resolve(hits.map(function (c) {
        return {
          displayName: c.name + '（本地表）',
          destination: Cesium.Cartesian3.fromDegrees(c.lon, c.lat, 9000)
        };
      }));
    }
  };

  var viewer = new Cesium.Viewer('c', {
    baseLayer: false,
    geocoder: localGeocoder,
    baseLayerPicker: 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;

  CITIES.forEach(function (c) {
    viewer.entities.add({
      position: Cesium.Cartesian3.fromDegrees(c.lon, c.lat, 0),
      point: {
        pixelSize: 7,
        color: Cesium.Color.fromCssColorString('#4d9bff'),
        outlineColor: Cesium.Color.WHITE,
        outlineWidth: 1.5,
        disableDepthTestDistance: Number.POSITIVE_INFINITY
      },
      label: {
        text: c.name,
        font: '500 12px "Microsoft YaHei", sans-serif',
        fillColor: Cesium.Color.WHITE,
        pixelOffset: new Cesium.Cartesian2(0, -18),
        disableDepthTestDistance: Number.POSITIVE_INFINITY
      }
    });
  });

  viewer.camera.flyTo({
    destination: Cesium.Cartesian3.fromDegrees(110, 34, 6200000),
    orientation: {
      heading: 0,
      pitch: Cesium.Math.toRadians(-90),
      roll: 0
    },
    duration: 0
  });
})();
</script>
</body>
</html>