This example uses image tiles of the moon's surface to create a map.
Read the documentation.
function initMap() { var map = new google.maps.Map(document.getElementById('map'), { center: {lat: 0, lng: 0}, zoom: 1, streetViewControl: false, mapTypeControlOptions: { mapTypeIds: ['moon'] } }); var moonMapType = new google.maps.ImageMapType({ getTileUrl: function(coord, zoom) { var normalizedCoord = getNormalizedCoord(coord, zoom); if (!normalizedCoord) { return null; } var bound = Math.pow(2, zoom); return '//mw1.google.com/mw-planetary/lunar/lunarmaps_v1/clem_bw' + '/' + zoom + '/' + normalizedCoord.x + '/' + (bound - normalizedCoord.y - 1) + '.jpg'; }, tileSize: new google.maps.Size(256, 256), maxZoom: 9, minZoom: 0, radius: 1738000, name: 'Moon' }); map.mapTypes.set('moon', moonMapType); map.setMapTypeId('moon'); } // Normalizes the coords that tiles repeat across the x axis (horizontally) // like the standard Google map tiles. function getNormalizedCoord(coord, zoom) { var y = coord.y; var x = coord.x; // tile range in one direction range is dependent on zoom level // 0 = 1 tile, 1 = 2 tiles, 2 = 4 tiles, 3 = 8 tiles, etc var tileRange = 1 << zoom; // don't repeat across y-axis (vertically) if (y < 0 || y >= tileRange) { return null; } // repeat across x-axis if (x < 0 || x >= tileRange) { x = (x % tileRange + tileRange) % tileRange; } return {x: x, y: y}; }
<div id="map"></div>
/* 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; }
<!-- Replace the value of the key parameter with your own API key. --> <script async defer src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk&callback=initMap"> </script>
Try it yourself
You can experiment with this code in JSFiddle by clicking the <>
icon in the
top-right corner of the code window.
<!DOCTYPE html>
<html>
<head>
<title>Image Map Types</title>
<style>
/* 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>
</head>
<body>
<div id="map"></div>
<script>
function initMap() {
var map = new google.maps.Map(document.getElementById('map'), {
center: {lat: 0, lng: 0},
zoom: 1,
streetViewControl: false,
mapTypeControlOptions: {
mapTypeIds: ['moon']
}
});
var moonMapType = new google.maps.ImageMapType({
getTileUrl: function(coord, zoom) {
var normalizedCoord = getNormalizedCoord(coord, zoom);
if (!normalizedCoord) {
return null;
}
var bound = Math.pow(2, zoom);
return '//mw1.google.com/mw-planetary/lunar/lunarmaps_v1/clem_bw' +
'/' + zoom + '/' + normalizedCoord.x + '/' +
(bound - normalizedCoord.y - 1) + '.jpg';
},
tileSize: new google.maps.Size(256, 256),
maxZoom: 9,
minZoom: 0,
radius: 1738000,
name: 'Moon'
});
map.mapTypes.set('moon', moonMapType);
map.setMapTypeId('moon');
}
// Normalizes the coords that tiles repeat across the x axis (horizontally)
// like the standard Google map tiles.
function getNormalizedCoord(coord, zoom) {
var y = coord.y;
var x = coord.x;
// tile range in one direction range is dependent on zoom level
// 0 = 1 tile, 1 = 2 tiles, 2 = 4 tiles, 3 = 8 tiles, etc
var tileRange = 1 << zoom;
// don't repeat across y-axis (vertically)
if (y < 0 || y >= tileRange) {
return null;
}
// repeat across x-axis
if (x < 0 || x >= tileRange) {
x = (x % tileRange + tileRange) % tileRange;
}
return {x: x, y: y};
}
</script>
<script async defer
src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap">
</script>
</body>
</html>