Basic

<!--
  示例：OpenLayers 带图层的二维地图
  要点：Map / View / TileLayer / VectorLayer 四件套，EPSG:3857 与经纬度互转
  依赖：OpenLayers 10.3.1 · 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>带图层的二维地图</title>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/ol@10.3.1/ol.css">
<style>
  html,body{height:100%;margin:0}
  body{display:flex;flex-direction:column;overflow:hidden;
       font:13px/1.6 -apple-system,"Segoe UI","PingFang SC",sans-serif}
  .bar{flex:0 0 auto;padding:8px 12px;background:#f6f7f9;border-bottom:1px solid #e3e6ea;
       display:flex;gap:10px;align-items:center;font-size:12px;color:#58606e}
  .bar label{display:flex;gap:5px;align-items:center;cursor:pointer}
  #map{flex:1 1 auto;min-height:0;background:#eef0f3}
</style>
</head>
<body>
<div class="bar">
  <label><input type="checkbox" id="tglVec" checked> 矢量图层</label>
  <span id="info">—</span>
</div>
<div id="map"></div>
<script src="https://cdn.jsdelivr.net/npm/ol@10.3.1/dist/ol.js"></script>
<script>
(function () {
  'use strict';

  if (typeof ol === 'undefined') {
    document.getElementById('map').innerHTML =
      '<div style="padding:20px;color:#b42318">OpenLayers 加载失败，请检查能否访问 cdn.jsdelivr.net</div>';
    return;
  }

  /* 经纬度转 Web 墨卡托，OpenLayers 默认使用 EPSG:3857 */
  var fromLonLat = ol.proj.fromLonLat;

  var center = fromLonLat([116.391263, 39.907359]);

  var view = new ol.View({
    center: center,
    zoom: 12,
    minZoom: 2,
    maxZoom: 19
  });

  /* 底图：公开的 OSM 瓦片，不需要 Key */
  var baseLayer = new ol.layer.Tile({
    source: new ol.source.XYZ({url: 'https://server.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer/tile/{z}/{y}/{x}', attributions: 'Tiles © Esri'})
  });

  /* 矢量图层：三个经纬度点，在 3857 下需要转换 */
  var features = [
    [116.391263, 39.907359, '天安门'],
    [116.410600, 39.914700, '王府井'],
    [116.374200, 39.909700, '西单']
  ].map(function (p) {
    var f = new ol.Feature({
      geometry: new ol.geom.Point(fromLonLat([p[0], p[1]])),
      name: p[2]
    });
    f.setStyle(new ol.style.Style({
      image: new ol.style.Circle({
        radius: 6,
        fill: new ol.style.Fill({ color: '#1f5fd0' }),
        stroke: new ol.style.Stroke({ color: '#ffffff', width: 2 })
      }),
      text: new ol.style.Text({
        text: p[2],
        offsetY: -14,
        font: '500 12px sans-serif',
        fill: new ol.style.Fill({ color: '#16181d' }),
        stroke: new ol.style.Stroke({ color: '#ffffff', width: 3 })
      })
    }));
    return f;
  });

  var vecLayer = new ol.layer.Vector({
    source: new ol.source.Vector({ features: features })
  });

  var map = new ol.Map({
    target: 'map',
    layers: [baseLayer, vecLayer],
    view: view,
    controls: ol.control.defaults.defaults({
      attribution: false,
      zoom: true,
      rotate: false
    })
  });

  document.getElementById('tglVec').addEventListener('change', function () {
    vecLayer.setVisible(this.checked);
  });

  /* 点击地图时读出经纬度 */
  map.on('singleclick', function (evt) {
    var lonlat = ol.proj.toLonLat(evt.coordinate);
    document.getElementById('info').textContent =
      lonlat[0].toFixed(6) + ', ' + lonlat[1].toFixed(6);
  });
})();
</script>
</body>
</html>