Mouse Position

<!--
  示例：坐标显示
  要点：ol.control.MousePosition 与 pointermove 配合，同时输出经纬度和米制坐标
  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>坐标显示</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}
  .bar b{color:#16181d;font-family:ui-monospace,Consolas,monospace;font-weight:500}
  #map{flex:1 1 auto;min-height:0;background:#eef0f3}
  .ol-mouse-position{top:10px;right:10px;bottom:auto;background:rgba(255,255,255,0.92);
       border:1px solid #e3e6ea;border-radius:4px;padding:3px 8px;
       font:12px/1.5 ui-monospace,Consolas,monospace;color:#16181d;min-width:150px;text-align:center}
</style>
</head>
<body>
<div class="bar">
  <span>经纬度 <b id="lonlat">—</b></span>
  <span>米制 <b id="metric">—</b></span>
  <span>六十进制 <b id="dms">—</b></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;

  /* 控件版坐标显示：直接挂在视图右上角 */
  var mousePosition = new ol.control.MousePosition({
    coordinateFormat: ol.coordinate.createStringXY(4),
    projection: 'EPSG:4326',
    placeholder: '移入地图',
    className: 'ol-mouse-position'
  });

  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'}) })
    ],
    view: new ol.View({
      center: fromLonLat([116.391263, 39.907359]),
      zoom: 12
    }),
    controls: ol.control.defaults.defaults({
      attribution: false,
      rotate: false
    }).extend([mousePosition])
  });

  var lonlatEl = document.getElementById('lonlat');
  var metricEl = document.getElementById('metric');
  var dmsEl = document.getElementById('dms');

  /* 事件版坐标显示：可以拿到投影前后的两种值 */
  map.on('pointermove', function (evt) {
    if (evt.dragging) return;

    var lonlat = ol.proj.toLonLat(evt.coordinate);

    lonlatEl.textContent =
      lonlat[0].toFixed(6) + ', ' + lonlat[1].toFixed(6);

    metricEl.textContent =
      evt.coordinate[0].toFixed(0) + ', ' + evt.coordinate[1].toFixed(0);

    dmsEl.textContent = ol.coordinate.degreesToStringHDMS(lonlat, 'lonlat');
  });
})();
</script>
</body>
</html>