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Image Map Types
Page Summary
This example demonstrates how to create a custom map type using images of the moon's surface.
It uses the
ImageMapTypeclass to define the map type andgetTileUrlfunction to fetch image tiles.The example provides code in both JavaScript and TypeScript.
The map is initialized with a center point at latitude 0 and longitude 0, with an initial zoom level of 1.
This example uses image tiles of the moon's surface to create a map.
Read thedocumentation.
TypeScript
functioninitMap():void{constmap=newgoogle.maps.Map(document.getElementById("map")asHTMLElement,{center:{lat:0,lng:0},zoom:1,streetViewControl:false,mapTypeControlOptions:{mapTypeIds:["moon"],},});constmoonMapType=newgoogle.maps.ImageMapType({getTileUrl:function(coord,zoom):string{constnormalizedCoord=getNormalizedCoord(coord,zoom);if(!normalizedCoord){return"";}constbound=Math.pow(2,zoom);return("https://mw1.google.com/mw-planetary/lunar/lunarmaps_v1/clem_bw"+"/"+zoom+"/"+normalizedCoord.x+"/"+(bound-normalizedCoord.y-1)+".jpg");},tileSize:newgoogle.maps.Size(256,256),maxZoom:9,minZoom:0,// @ts-ignore TODO 'radius' does not exist in type 'ImageMapTypeOptions'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.functiongetNormalizedCoord(coord,zoom){consty=coord.y;letx=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, etcconsttileRange=1 <<zoom;// don't repeat across y-axis (vertically)if(y <0||y>=tileRange){returnnull;}// repeat across x-axisif(x <0||x>=tileRange){x=((x%tileRange)+tileRange)%tileRange;}return{x:x,y:y};}declareglobal{interfaceWindow{initMap:()=>void;}}window.initMap=initMap;
JavaScript
functioninitMap(){constmap=newgoogle.maps.Map(document.getElementById("map"),{center:{lat:0,lng:0},zoom:1,streetViewControl:false,mapTypeControlOptions:{mapTypeIds:["moon"],},});constmoonMapType=newgoogle.maps.ImageMapType({getTileUrl:function(coord,zoom){constnormalizedCoord=getNormalizedCoord(coord,zoom);if(!normalizedCoord){return"";}constbound=Math.pow(2,zoom);return("https://mw1.google.com/mw-planetary/lunar/lunarmaps_v1/clem_bw"+"/"+zoom+"/"+normalizedCoord.x+"/"+(bound-normalizedCoord.y-1)+".jpg");},tileSize:newgoogle.maps.Size(256,256),maxZoom:9,minZoom:0,// @ts-ignore TODO 'radius' does not exist in type 'ImageMapTypeOptions'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.functiongetNormalizedCoord(coord,zoom){consty=coord.y;letx=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, etcconsttileRange=1 <<zoom;// don't repeat across y-axis (vertically)if(y <0||y>=tileRange){returnnull;}// repeat across x-axisif(x <0||x>=tileRange){x=((x%tileRange)+tileRange)%tileRange;}return{x:x,y:y};}window.initMap=initMap;
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
<html> <head> <title>Image Map Types</title> <link rel="stylesheet" type="text/css" href="./style.css" /> <script type="module" src="./index.js"></script> </head> <body> <div></div> <!-- The `defer` attribute causes the script to execute after the full HTML document has been parsed. For non-blocking uses, avoiding race conditions, and consistent behavior across browsers, consider loading using Promises. See https://developers.google.com/maps/documentation/javascript/load-maps-js-api for more information. --> <script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyB41DRUbKWJHPxaFjMAwdrzWzbVKartNGg&callback=initMap&v=weekly" defer ></script> </body></html>
Try Sample
Clone Sample
Git and Node.js are required to run this sample locally. Follow theseinstructions to install Node.js and NPM. The following commands clone, install dependencies and start the sample application.
gitclone-bsample-maptype-imagehttps://github.com/googlemaps/js-samples.gitcdjs-samplesnpminpmstart
Other samples can be tried by switching to any branch beginning withsample-SAMPLE_NAME.
gitcheckoutsample-SAMPLE_NAMEnpminpmstart
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Last updated 2025-12-18 UTC.