Wkb

<!--
  示例：OpenLayers WKB 几何解析
  要点：ol.format.WKB 读取十六进制 WKB，dataProjection 与 featureProjection 完成坐标转换
  依赖：OpenLayers 10.3.1 · jsDelivr CDN
-->
<!DOCTYPE html>
<html lang="zh-CN">
<head>
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<meta name="viewport" content="width=device-width, initial-scale=1">
<title>WKB 几何解析</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 id="info">解析中…</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 wkbHex = '0103000000010000000500000054E3A59BC4602540643BDF4F8D1739C0' +
    '5C8FC2F5284C4140EC51B81E852B34C0D578E926316843406F1283C0CAD141C0' +
    '1B2FDD2406012B40A4703D0AD79343C054E3A59BC4602540643BDF4F8D1739C0';

  var format = new ol.format.WKB();
  var feature = format.readFeature(wkbHex, {
    dataProjection: 'EPSG:4326',
    featureProjection: 'EPSG:3857'
  });

  var vector = new ol.layer.Vector({
    source: new ol.source.Vector({features: [feature]}),
    style: new ol.style.Style({
      fill: new ol.style.Fill({color: 'rgba(46, 125, 50, 0.28)'}),
      stroke: new ol.style.Stroke({color: '#2e7d32', width: 2})
    })
  });

  var map = new ol.Map({
    target: 'map',
    layers: [
      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'}), opacity: 0.7}),
      vector
    ],
    view: new ol.View({
      center: ol.proj.fromLonLat([134, -25]),
      zoom: 4
    })
  });

  var geometry = feature.getGeometry();
  map.getView().fit(geometry.getExtent(), {padding: [60, 60, 60, 60]});

  document.getElementById('info').textContent =
    geometry.getType() + ' · ' + geometry.getCoordinates()[0].length +
    ' 个坐标点 · 十六进制 ' + wkbHex.length + ' 字符';

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