Vector Style

<!--
  示例：矢量样式化
  要点：一个数据源混合点线面，样式函数按 kind 属性分发不同符号
  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>矢量样式化</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:16px;align-items:center;font-size:12px;color:#58606e;flex-wrap:wrap}
  .legend{display:flex;gap:6px;align-items:center}
  .dot{width:10px;height:10px;border-radius:50%;display:inline-block}
  .seg{width:18px;height:3px;display:inline-block}
  #map{flex:1 1 auto;min-height:0;background:#eef0f3}
</style>
</head>
<body>
<div class="bar">
  <span class="legend"><i class="dot" style="background:#d0453a"></i> 站点</span>
  <span class="legend"><i class="seg" style="background:#1f5fd0"></i> 路线</span>
  <span class="legend"><i class="dot" style="background:#2f9e6e;border-radius:2px"></i> 片区</span>
  <span>样式全部由样式函数按属性生成</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;
  }

  var fromLonLat = ol.proj.fromLonLat;

  var route = new ol.Feature({
    kind: 'route',
    name: '巡查路线',
    geometry: new ol.geom.LineString([
      fromLonLat([116.310, 39.905]),
      fromLonLat([116.355, 39.930]),
      fromLonLat([116.400, 39.915]),
      fromLonLat([116.442, 39.935]),
      fromLonLat([116.485, 39.908])
    ])
  });

  var zone = new ol.Feature({
    kind: 'zone',
    name: '重点片区',
    geometry: new ol.geom.Polygon([[
      fromLonLat([116.380, 39.955]),
      fromLonLat([116.470, 39.955]),
      fromLonLat([116.470, 39.900]),
      fromLonLat([116.380, 39.900]),
      fromLonLat([116.380, 39.955])
    ]])
  });

  var sites = [
    [116.310, 39.905, '西单'],
    [116.400, 39.915, '王府井'],
    [116.485, 39.908, '国贸']
  ].map(function (s) {
    return new ol.Feature({
      kind: 'site',
      name: s[2],
      geometry: new ol.geom.Point(fromLonLat([s[0], s[1]]))
    });
  });

  var source = new ol.source.Vector({
    features: [zone, route].concat(sites)
  });

  /* 样式函数：按 kind 分发，返回数组表示叠加多个符号层 */
  function styleFunction(feature) {
    var kind = feature.get('kind');

    if (kind === 'zone') {
      return [
        new ol.style.Style({
          fill: new ol.style.Fill({ color: 'rgba(47,158,110,0.20)' }),
          stroke: new ol.style.Stroke({ color: '#2f9e6e', width: 2 })
        }),
        new ol.style.Style({
          text: new ol.style.Text({
            text: feature.get('name'),
            font: '600 12px sans-serif',
            fill: new ol.style.Fill({ color: '#1d6b4a' })
          })
        })
      ];
    }

    if (kind === 'route') {
      return new ol.style.Style({
        stroke: new ol.style.Stroke({ color: '#1f5fd0', width: 3, lineDash: [10, 6] })
      });
    }

    return [
      new ol.style.Style({
        image: new ol.style.Circle({
          radius: 6,
          fill: new ol.style.Fill({ color: '#d0453a' }),
          stroke: new ol.style.Stroke({ color: '#ffffff', width: 2 })
        })
      }),
      new ol.style.Style({
        text: new ol.style.Text({
          text: feature.get('name'),
          offsetY: 16,
          font: '500 12px sans-serif',
          fill: new ol.style.Fill({ color: '#16181d' }),
          stroke: new ol.style.Stroke({ color: '#ffffff', width: 3 })
        })
      })
    ];
  }

  var vectorLayer = new ol.layer.Vector({
    source: source,
    style: styleFunction
  });

  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'}) }),
      vectorLayer
    ],
    view: new ol.View({
      center: fromLonLat([116.400, 39.915]),
      zoom: 12
    })
  });
})();
</script>
</body>
</html>