Edit

IIIF Image API

 
Enter info.json URL:

Example of a IIIF Image API source.

Example of a tile source for an International Image Interoperability Framework (IIIF) Image Service. Try any Image API version 1 or 2 service.

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index.html<!DOCTYPE html>
<html lang="en">
  <head>
    <title>IIIF Image API</title>
    <!-- The line below is only needed for old environments like Internet Explorer and Android 4.x -->
    <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"></script>
    <style>
      .map {
        width: 100%;
        height:400px;
      }
    </style>
  </head>
  <body>
    <div id="map" class="map"></div>
    <div class="controls">
      <div id="iiif-notification">&nbsp;</div>
      Enter <code>info.json</code> URL:
      <input type="text" id="imageInfoUrl" value="https://iiif.ub.uni-leipzig.de/iiif/j2k/0000/0107/0000010732/00000072.jpx/info.json">
      <button id="display">Display image</button>
    </div>
    <script src="index.js"></script>
  </body>
</html>
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index.jsimport 'ol/ol.css';
import Map from 'ol/Map';
import View from 'ol/View';
import TileLayer from 'ol/layer/Tile';
import IIIF from 'ol/source/IIIF';
import IIIFInfo from 'ol/format/IIIFInfo';

var layer = new TileLayer(),
    map = new Map({
      layers: [layer],
      target: 'map'
    }),
    notifyDiv = document.getElementById('iiif-notification'),
    urlInput = document.getElementById('imageInfoUrl'),
    displayButton = document.getElementById('display');

function refreshMap(imageInfoUrl) {
  fetch(imageInfoUrl).then(function(response) {
    response.json().then(function(imageInfo) {
      var options = new IIIFInfo(imageInfo).getTileSourceOptions();
      if (options === undefined || options.version === undefined) {
        notifyDiv.textContent = 'Data seems to be no valid IIIF image information.';
        return;
      }
      options.zDirection = -1;
      var iiifTileSource = new IIIF(options);
      layer.setSource(iiifTileSource);
      map.setView(new View({
        resolutions: iiifTileSource.getTileGrid().getResolutions(),
        extent: iiifTileSource.getTileGrid().getExtent(),
        constrainOnlyCenter: true
      }));
      map.getView().fit(iiifTileSource.getTileGrid().getExtent());
      notifyDiv.textContent = '';
    }).catch(function(body) {
      notifyDiv.textContent = 'Could not read image info json. ' + body;
    });
  }).catch(function() {
    notifyDiv.textContent = 'Could not read data from URL.';
  });
}

displayButton.addEventListener('click', function() {
  refreshMap(urlInput.value);
});

refreshMap(urlInput.value);
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package.json{
  "name": "iiif",
  "dependencies": {
    "ol": "6.1.1"
  },
  "devDependencies": {
    "parcel": "1.11.0"
  },
  "scripts": {
    "start": "parcel index.html",
    "build": "parcel build --experimental-scope-hoisting --public-url . index.html"
  }
}