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Overlaying an Image Map Type

This example uses image tiles to overlay an image that represents the interior of a building onto the map.

Read the documentation.

JavaScript

function initMap() {
  var map = new google.maps.Map(document.getElementById("map"), {
    zoom: 18,
    center: { lat: 37.783, lng: -122.403 }
  });

  var bounds = {
    17: [
      [20969, 20970],
      [50657, 50658]
    ],
    18: [
      [41939, 41940],
      [101315, 101317]
    ],
    19: [
      [83878, 83881],
      [202631, 202634]
    ],
    20: [
      [167757, 167763],
      [405263, 405269]
    ]
  };

  var imageMapType = new google.maps.ImageMapType({
    getTileUrl: function(coord, zoom) {
      if (
        zoom < 17 ||
        zoom > 20 ||
        bounds[zoom][0][0] > coord.x ||
        coord.x > bounds[zoom][0][1] ||
        bounds[zoom][1][0] > coord.y ||
        coord.y > bounds[zoom][1][1]
      ) {
        return null;
      }

      return [
        "https://www.gstatic.com/io2010maps/tiles/5/L2_",
        zoom,
        "_",
        coord.x,
        "_",
        coord.y,
        ".png"
      ].join("");
    },
    tileSize: new google.maps.Size(256, 256)
  });

  map.overlayMapTypes.push(imageMapType);
}

CSS

/* Always set the map height explicitly to define the size of the div
       * element that contains the map. */
#map {
  height: 100%;
}

/* Optional: Makes the sample page fill the window. */
html,
body {
  height: 100%;
  margin: 0;
  padding: 0;
}

HTML

<!DOCTYPE html>
<html>
  <head>
    <title>Overlaying an Image Map Type</title>
    <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
    <script
      src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap&libraries=&v=weekly"
      defer
    ></script>
    <link rel="stylesheet" type="text/css" href="./style.css" />
    <script src="./app.js"></script>
  </head>
  <body>
    <div id="map"></div>
  </body>
</html>

All

<!DOCTYPE html>
<html>
  <head>
    <title>Overlaying an Image Map Type</title>
    <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
    <script
      src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap&libraries=&v=weekly"
      defer
    ></script>
    <style type="text/css">
      /* Always set the map height explicitly to define the size of the div
       * element that contains the map. */
      #map {
        height: 100%;
      }

      /* Optional: Makes the sample page fill the window. */
      html,
      body {
        height: 100%;
        margin: 0;
        padding: 0;
      }
    </style>
    <script>
      (function(exports) {
        "use strict";

        function initMap() {
          var map = new google.maps.Map(document.getElementById("map"), {
            zoom: 18,
            center: {
              lat: 37.783,
              lng: -122.403
            }
          });
          var bounds = {
            17: [
              [20969, 20970],
              [50657, 50658]
            ],
            18: [
              [41939, 41940],
              [101315, 101317]
            ],
            19: [
              [83878, 83881],
              [202631, 202634]
            ],
            20: [
              [167757, 167763],
              [405263, 405269]
            ]
          };
          var imageMapType = new google.maps.ImageMapType({
            getTileUrl: function(coord, zoom) {
              if (
                zoom < 17 ||
                zoom > 20 ||
                bounds[zoom][0][0] > coord.x ||
                coord.x > bounds[zoom][0][1] ||
                bounds[zoom][1][0] > coord.y ||
                coord.y > bounds[zoom][1][1]
              ) {
                return null;
              }

              return [
                "https://www.gstatic.com/io2010maps/tiles/5/L2_",
                zoom,
                "_",
                coord.x,
                "_",
                coord.y,
                ".png"
              ].join("");
            },
            tileSize: new google.maps.Size(256, 256)
          });
          map.overlayMapTypes.push(imageMapType);
        }

        exports.initMap = initMap;
      })((this.window = this.window || {}));
    </script>
  </head>
  <body>
    <div id="map"></div>
  </body>
</html>
(function(exports) { "use strict"; function initMap() { var map = new google.maps.Map(document.getElementById("map"), { zoom: 18, center: { lat: 37.783, lng: -122.403 } }); var bounds = { 17: [ [20969, 20970], [50657, 50658] ], 18: [ [41939, 41940], [101315, 101317] ], 19: [ [83878, 83881], [202631, 202634] ], 20: [ [167757, 167763], [405263, 405269] ] }; var imageMapType = new google.maps.ImageMapType({ getTileUrl: function(coord, zoom) { if ( zoom < 17 || zoom > 20 || bounds[zoom][0][0] > coord.x || coord.x > bounds[zoom][0][1] || bounds[zoom][1][0] > coord.y || coord.y > bounds[zoom][1][1] ) { return null; } return [ "https://www.gstatic.com/io2010maps/tiles/5/L2_", zoom, "_", coord.x, "_", coord.y, ".png" ].join(""); }, tileSize: new google.maps.Size(256, 256) }); map.overlayMapTypes.push(imageMapType); } exports.initMap = initMap; })((this.window = this.window || {}));
/* Always set the map height explicitly to define the size of the div * element that contains the map. */ #map { height: 100%; } /* Optional: Makes the sample page fill the window. */ html, body { height: 100%; margin: 0; padding: 0; }
<!DOCTYPE html> <html> <head> <title>Overlaying an Image Map Type</title> <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script> <script src="https://maps.googleapis.com/maps/api/js?key=&callback=initMap&libraries=&v=weekly" defer ></script> <!-- jsFiddle will insert css and js --> </head> <body> <div id="map"></div> </body> </html>