Zoomify Layer

<style>
#map {
  height: 350px;
  position: relative;
  width: 100%;
}

</style>
<div id="map"></div>

<script>
var NPMap = {
  baseLayers: [{
    attribution: 'Harpers Ferry Center',
    height: 6738,
    type: 'zoomify',
    url: 'https://www.nps.gov/parkmaps/yell/img/{g}/{z}-{x}-{y}.jpg',
    width: 5069
  }],
  div: 'map'
};

(function () {
  var s = document.createElement('script');
  s.src = 'https://www.nps.gov/lib/npmap.js/4.0.0/npmap-bootstrap.js';
  document.body.appendChild(s);
})();

</script>