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我尝试从 zoomify 查看器切换到 OpenLayers。但是，我没有成功加载 zoomify 图像。

这是网址： https ://get.microvisioneer.com/scans/oltest2_stackoverflow.html

它成功地从 TileGroup18 加载了一个图块 (7-57-24.jpg)，但页面上没有显示任何内容。

我究竟做错了什么？

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1 回答 1

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您需要设置并打开视图

<!doctype html>
<html lang="en">
  <head>
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/openlayers/openlayers.github.io@master/en/v6.3.1/css/ol.css" type="text/css">
    <style>
      .map {
        height: 400px;
        width: 400px;
      }
    </style>
    <script src="https://cdn.jsdelivr.net/gh/openlayers/openlayers.github.io@master/en/v6.3.1/build/ol.js"></script>
    <title>OpenLayers example</title>
  </head>
  <body>
    <h2>My Map</h2>
    <div id="map" class="map"></div>
    <script type="text/javascript">
	var imgWidth = 29184;
	var imgHeight = 12288;
	
	var zoomifyUrl = 'https://get.microvisioneer.com/scans/US20-589.svs.zoomify/';
	
	var source = new ol.source.Zoomify({
	  url: zoomifyUrl,
	  size: [imgWidth, imgHeight],
	  zDirection: -1 // Ensure we get a tile with the screen resolution or higher
	});

      var map = new ol.Map({
        target: 'map',
        layers: [
          new ol.layer.Tile({
            source: source
          })
        ],
        view: new ol.View({
          // adjust zoom levels to those provided by the source
          resolutions: source.getTileGrid().getResolutions(),
          // constrain the center: center cannot be set outside this extent
          extent: source.getTileGrid().getExtent(),
          constrainOnlyCenter: true
        })
      });
      map.getView().fit(source.getTileGrid().getExtent());
    </script>
  </body>
</html>

于 2020-05-16T09:59:20.153 回答