campusMap.html

<!DOCTYPE html>
<html>
  <head>
    <title>Campus Map</title>
    
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
    
    <style>
      body {
        max-width: 1000px;
        margin: 20px auto;
        padding: 0 20px;
        font-family: sans-serif;
      }
      #map {
        height: 100%;
      }
      html, body {
        height: 90%;
        margin: 0;
        padding: 0;
      }
    </style>
  </head>
  <body>
    <h1>Campus Map</h1>
    <div id="map"></div>
    
    <!-- Maps API Key (i just generated one at random, feel free to make a new one if you want) -->
    <script async defer
    src="https://maps.googleapis.com/maps/api/js?key=AIzaSyBl_NvT8EI28SqW-3qKVNEfMOJ9NftkDmk&callback=initMap">
    </script>
    
    <script>
    // Loads map of Gunn,
    // Sizes appropriately
    // I love sheep
    var mapOverlay;

    function initMap() {
      var map = new google.maps.Map(document.getElementById('map'), {
        zoom: 18,
        center: {lat: 37.400922, lng: -122.133584}
      });
      map.setMapTypeId('satellite');
       var imageBounds = {
    sw: {lat: 37.241595, lng: -122.081106},
    ne: {lat: 37.235703, lng: -122.075437}
  };

  historicalOverlay = new google.maps.GroundOverlay(
      '/images/mapoverlay.png',
      imageBounds);
  historicalOverlay.setMap(map);
    }
    </script>                                                                                
  </body>
</html>