Mapbox Vector Tiles Advanced

<!--
  说明：自定义瓦片网格的矢量瓦片的中文示例，数据在页面内生成，可独立运行。
  核心逻辑：ol.tilegrid.TileGrid 自定义 origin/resolutions/extent + 网格矢量可视化
  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>自定义瓦片网格的矢量瓦片</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 button{font:inherit;padding:3px 9px;border:1px solid #c9ced6;background:#fff;
       border-radius:5px;cursor:pointer;color:#333}
  .bar button:hover{background:#eef2f8}
  .bar input[type=range]{width:110px;vertical-align:middle}
  .bar input[type=text]{font:inherit;padding:2px 6px;border:1px solid #c9ced6;border-radius:4px}
  #map{flex:1 1 auto;min-height:0;background:#eef0f3;position:relative}
  .panel{flex:0 0 auto;max-height:34%;overflow:auto;padding:8px 12px;font-size:12px;
       background:#fff;border-top:1px solid #e3e6ea;color:#3d4451}
  .panel pre{margin:0;font-family:Consolas,"Courier New",monospace;font-size:11px;
       white-space:pre-wrap;word-break:break-all;line-height:1.5}
  .ol-attribution{font-size:11px}

</style>
</head>
<body>
<div class="bar">
<label><input type="checkbox" id="showGrid" checked> 显示瓦片网格</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') {
    var errBox = document.getElementById('map');
    if (errBox) {
      errBox.innerHTML = '<div style="padding:20px;color:#b42318">OpenLayers 加载失败，请检查能否访问 cdn.jsdelivr.net</div>';
    }
    return;
  }

  var fromLonLat = ol.proj.fromLonLat;
  var proj = ol.proj.get('EPSG:3857');
  var cnExtent = ol.proj.transformExtent([72, 15, 140, 55], 'EPSG:4326', 'EPSG:3857');

  /* 标准 EPSG:3857 分辨率序列：0 级 156543.03 米/像素，每级减半 */
  var resolutions = [];
  (function () {
    var res = 156543.03392804097;
    for (var z = 0; z <= 12; z++) {
      resolutions.push(res);
      res = res / 2;
    }
  })();

  var grid = new ol.tilegrid.TileGrid({
    origin: ol.extent.getTopLeft(proj.getExtent()),
    resolutions: resolutions,
    tileSize: 256,
    extent: cnExtent
  });

  var base = 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}', tileGrid: grid})});

  var gridSource = new ol.source.Vector();
  var gridLayer = new ol.layer.Vector({
    source: gridSource,
    style: new ol.style.Style({
      stroke: new ol.style.Stroke({color: 'rgba(238,96,42,0.9)', width: 1.5}),
      fill: new ol.style.Fill({color: 'rgba(238,96,42,0.06)'})
    })
  });

  var view = new ol.View({center: fromLonLat([104, 34]), zoom: 4});
  var map = new ol.Map({
    target: 'map',
    layers: [base, gridLayer],
    view: view,
    controls: ol.control.defaults.defaults({attribution: false, zoom: true, rotate: false})
  });

  var info = document.getElementById('info');
  var level = 4;
  var tc = grid.getTileCoordForCoordAndZ(fromLonLat([104, 34]), level);
  var count = 0;

  for (var dx = -3; dx <= 3; dx++) {
    for (var dy = -2; dy <= 2; dy++) {
      var ext = grid.getTileCoordExtent([level, tc[1] + dx, tc[2] + dy]);
      gridSource.addFeature(new ol.Feature({geometry: ol.geom.Polygon.fromExtent(ext)}));
      count++;
    }
  }

  var range = grid.getExtent();
  info.textContent = 'z=' + level + ' · 网格瓦片 ' + count + ' 块 · 每块 256 px · 分辨率 ' +
    view.getResolution().toFixed(2) + ' 米/像素';

  document.getElementById('showGrid').addEventListener('change', function () {
    gridLayer.setVisible(this.checked);
    info.textContent = this.checked
      ? 'z=' + level + ' · 网格瓦片 ' + count + ' 块 · 范围限制在 [72,15,140,55]'
      : '网格已隐藏 · 底图仍按自定义网格请求瓦片';
  });
})();
</script>
</body>
</html>