XYZ

<!--
  示例：OpenLayers XYZ 瓦片源
  要点：ol.source.XYZ 以 {z}/{x}/{y} 模板取瓦片，支持子域名轮询与自定义投影
  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>XYZ 瓦片源</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;flex-wrap:wrap;font-size:12px;color:#58606e}
  .bar label{display:flex;gap:5px;align-items:center;cursor:pointer}
  .bar select,.bar input[type=range]{font-size:12px}
  .bar .val{font-family:ui-monospace,Consolas,monospace;color:#1f5fd0;min-width:44px}
  .bar .sep{width:1px;height:16px;background:#d8dce2}
  #map{flex:1 1 auto;min-height:0;background:#eef0f3}
</style>
</head>
<body>
<div class="bar">
  <span>模板 {z}/{x}/{y} · 子域 a-c</span>
  <span class="sep"></span>
  <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').textContent = 'OpenLayers 加载失败，请检查能否访问 cdn.jsdelivr.net';
    return;
  }


  var source = new ol.source.XYZ({
    url: 'https://server.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer/tile/{z}/{y}/{x}',
    attributions: 'Tiles © Esri',
    maxZoom: 19,
    crossOrigin: 'anonymous'
  });

  var map = new ol.Map({
    target: 'map',
    layers: [new ol.layer.Tile({source: source})],
    view: new ol.View({
      center: ol.proj.fromLonLat([116.391, 39.907]),
      zoom: 10
    })
  });

  function updateInfo() {
    var center = ol.proj.toLonLat(map.getView().getCenter());
    document.getElementById('info').textContent =
      center[0].toFixed(4) + ', ' + center[1].toFixed(4) +
      ' · z' + map.getView().getZoom().toFixed(1);
  }

  map.on('moveend', updateInfo);
  updateInfo();

})();
</script>
</body>
</html>