maptalks - 获取地图状态

获取地图状态

index.html

<!DOCTYPE html>
<html>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>地图 - 获取地图状态</title>
  <style type="text/css">
    html,body{margin:0px;height:100%;width:100%}
    .container{width:100%;height:100%}
    #status{position:fixed;left:0px;top:0px;width:100%;height:140px;overflow:hidden}
    #status div{background-color:rgba(13, 13, 13, 0.5);width:100%;height:100%;padding:10px 10px 10px 10px;font:13px bold sans-serif;color:#fff}
  </style>
  <link rel="stylesheet" href="https://unpkg.com/maptalks/dist/maptalks.css">
  <script type="text/javascript" src="https://unpkg.com/maptalks/dist/maptalks.min.js"></script>
  <body>

    <div id="map" class="container"></div>
    <div id="status"></div>
    <script>

      var map = new maptalks.Map('map', {
        center: [-0.113049,51.498568],
        zoom: 14,
        centerCross: true,
        baseLayer: new maptalks.TileLayer('base', {
          urlTemplate: 'https://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}.png',
          subdomains: ['a','b','c','d'],
          attribution: '&copy; <a href="http://osm.org">OpenStreetMap</a> contributors, &copy; <a href="https://carto.com/">CARTO</a>'
        })
      });

      map.on('zoomend moving moveend', getStatus);

      getStatus();

      function getStatus() {
        var extent = map.getExtent(),
          ex = [
            '{',
            'xmin:' + extent.xmin.toFixed(5),
            ', ymin:' + extent.ymin.toFixed(5),
            ', xmax:' + extent.xmax.toFixed(5),
            ', ymax:' + extent.xmax.toFixed(5),
            '}'
          ].join('');
        var center = map.getCenter();
        var mapStatus = [
          'Center : [' + [center.x.toFixed(5), center.y.toFixed(5)].join() + ']',
          'Extent : ' + ex,
          'Size : ' + map.getSize().toArray().join(),
          'Zoom : '   + map.getZoom(),
          'MinZoom : ' + map.getMinZoom(),
          'MaxZoom : ' + map.getMaxZoom(),
          'Projection : ' + map.getProjection().code
        ];

        document.getElementById('status').innerHTML = '<div>' + mapStatus.join('<br>') + '</div>';
      }


    </script>
  </body>
</html>

var map = new maptalks.Map('map', {
  center: [-0.113049, 51.498568],
  zoom: 14,
  centerCross: true,
  baseLayer: new maptalks.TileLayer('base', {
    urlTemplate: 'https://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}.png',
    subdomains: ['a', 'b', 'c', 'd'],
    attribution: '© <a href="http://osm.org">OpenStreetMap</a>  contributors, © <a href="https://carto.com/">CARTO</a> '
  })
});

map.on('zoomend moving moveend', getStatus);

getStatus();

function getStatus() {
  var extent = map.getExtent(),
    ex = [
      '{',
      'xmin:' + extent.xmin.toFixed(5),
      ', ymin:' + extent.ymin.toFixed(5),
      ', xmax:' + extent.xmax.toFixed(5),
      ', ymax:' + extent.xmax.toFixed(5),
      '}'
    ].join('');
  var center = map.getCenter();
  var mapStatus = [
    'Center : [' + [center.x.toFixed(5), center.y.toFixed(5)].join() + ']',
    'Extent : ' + ex,
    'Size : ' + map.getSize().toArray().join(),
    'Zoom : ' + map.getZoom(),
    'MinZoom : ' + map.getMinZoom(),
    'MaxZoom : ' + map.getMaxZoom(),
    'Projection : ' + map.getProjection().code
  ];

document.getElementById('status').innerHTML = '<div>' + mapStatus.join('<br>') + '</div>';
}