function initMap() {
  var map = new google.maps.Map(document.getElementById('map'), {
    zoom: 5,
    center: {lat: 41.876, lng: -87.624}
  });

  var ctaLayer = new google.maps.KmlLayer({
    url: 'https://www.google.com/maps/d/u/0/kml?mid=105Q0otgybs36h0OOfNi67cI2VHYSXRk5',
    map: map
  });
}