Zoomify example

Example of a Zoomify source.

Zoomify is a format for deep-zooming into high resolution images. This example shows how to use the Zoomify source with a pixel projection.

zoomify, deep zoom, pixel, projection
<!DOCTYPE html>
<html>
<head>
<title>Zoomify example</title>
<script src="https://code.jquery.com/jquery-1.11.2.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="http://openlayers.org/en/v3.9.0/css/ol.css" type="text/css">
<script src="http://openlayers.org/en/v3.9.0/build/ol.js"></script>

</head>
<body>
<div class="container-fluid">

<div class="row-fluid">
  <div class="span12">
    <div id="map" class="map"></div>
  </div>
</div>

</div>
<script>
// This server does not support CORS, and so is incompatible with WebGL.
//var imgWidth = 8001;
//var imgHeight = 6943;
//var url = 'http://mapy.mzk.cz/AA22/0103/';
//var crossOrigin = undefined;

var imgWidth = 9911;
var imgHeight = 6100;
var url = 'http://vips.vtech.fr/cgi-bin/iipsrv.fcgi?zoomify=' +
        '/mnt/MD1/AD00/plan_CHU-4HD-01/FOND.TIF/';
var crossOrigin = 'anonymous';

var imgCenter = [imgWidth / 2, - imgHeight / 2];

// Maps always need a projection, but Zoomify layers are not geo-referenced, and
// are only measured in pixels.  So, we create a fake projection that the map
// can use to properly display the layer.
var proj = new ol.proj.Projection({
  code: 'ZOOMIFY',
  units: 'pixels',
  extent: [0, 0, imgWidth, imgHeight]
});

var source = new ol.source.Zoomify({
  url: url,
  size: [imgWidth, imgHeight],
  crossOrigin: crossOrigin
});

var map = new ol.Map({
  layers: [
    new ol.layer.Tile({
      source: source
    })
  ],
  target: 'map',
  view: new ol.View({
    projection: proj,
    center: imgCenter,
    zoom: 0,
    // constrain the center: center cannot be set outside
    // this extent
    extent: [0, -imgHeight, imgWidth, 0]
  })
});

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