Vector Osm

<!--
  示例：OpenLayers OSM XML 数据
  要点：ol.format.OSMXML 解析页面内 OSM XML，way 标签决定建筑、道路与绿地样式
  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>OSM XML 数据</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>页面内 OSM XML</span>
  <span class="sep"></span>
  <span id="info">建筑 1 · 道路 1 · 绿地 1</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 osmXml = '<osm version="0.6" generator="inline-demo">' +
    '<node id="1" lat="39.9000" lon="116.3880"/>' +
    '<node id="2" lat="39.9000" lon="116.3950"/>' +
    '<node id="3" lat="39.9050" lon="116.3950"/>' +
    '<node id="4" lat="39.9050" lon="116.3880"/>' +
    '<node id="5" lat="39.9000" lon="116.3880"/>' +
    '<node id="6" lat="39.8980" lon="116.3860"/>' +
    '<node id="7" lat="39.8980" lon="116.3980"/>' +
    '<node id="8" lat="39.9070" lon="116.3980"/>' +
    '<node id="9" lat="39.9070" lon="116.3860"/>' +
    '<node id="10" lat="39.9062" lon="116.3888"/>' +
    '<node id="11" lat="39.9062" lon="116.3932"/>' +
    '<node id="12" lat="39.9086" lon="116.3932"/>' +
    '<node id="13" lat="39.9086" lon="116.3888"/>' +
    '<node id="14" lat="39.9062" lon="116.3888"/>' +
    '<way id="101"><nd ref="1"/><nd ref="2"/><nd ref="3"/><nd ref="4"/><nd ref="5"/>' +
    '<tag k="building" v="yes"/><tag k="name" v="演示建筑"/></way>' +
    '<way id="102"><nd ref="6"/><nd ref="7"/><nd ref="8"/><nd ref="9"/>' +
    '<tag k="highway" v="residential"/><tag k="name" v="演示道路"/></way>' +
    '<way id="103"><nd ref="10"/><nd ref="11"/><nd ref="12"/><nd ref="13"/><nd ref="14"/>' +
    '<tag k="landuse" v="grass"/><tag k="name" v="演示绿地"/></way>' +
    '</osm>';

  var loaded = false;

  var format = new ol.format.OSMXML();

  var vectorSource = new ol.source.Vector({
    format: format,
    strategy: ol.loadingstrategy.bbox,
    loader: function (extent, resolution, projection, success) {
      if (loaded) {
        success([]);
        return;
      }
      loaded = true;
      var features = format.readFeatures(osmXml, {
        featureProjection: projection
      });
      vectorSource.addFeatures(features);
      success(features);
    }
  });

  var buildingStyle = new ol.style.Style({
    zIndex: 100,
    fill: new ol.style.Fill({color: 'rgba(246, 99, 79, 0.35)'}),
    stroke: new ol.style.Stroke({color: '#f6634f', width: 1})
  });

  var roadStyle = new ol.style.Style({
    stroke: new ol.style.Stroke({color: '#ffffff', width: 4})
  });

  var grassStyle = new ol.style.Style({
    fill: new ol.style.Fill({color: 'rgba(140, 208, 95, 0.4)'}),
    stroke: new ol.style.Stroke({color: '#8cd05f', width: 1})
  });

  var vector = new ol.layer.Vector({
    source: vectorSource,
    style: function (feature) {
      if (feature.get('building')) {
        return buildingStyle;
      }
      if (feature.get('highway')) {
        return roadStyle;
      }
      if (feature.get('landuse')) {
        return grassStyle;
      }
      return null;
    }
  });

  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: 0.55}),
      vector
    ],
    view: new ol.View({
      center: ol.proj.fromLonLat([116.392, 39.9035]),
      zoom: 18
    })
  });

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