Overlaying an Image Map Type
AI-generated Key Takeaways
This example demonstrates how to overlay an image representing a building's interior onto a Google Map using image tiles.
It utilizes the
google.maps.ImageMapTypeclass to define the image overlay and its tile coordinates.The code provides functionality to fetch and display image tiles within specified zoom levels and bounds.
A predefined set of image tiles is used, and the example showcases how to integrate them with the map.
Users can explore the interactive example via provided links to JSFiddle and Google Cloud Shell, or clone the sample code for local execution.
This example uses image tiles to overlay an image that represents the interiorof a building onto the map.
Read thedocumentation.
TypeScript
functioninitMap():void{constmap=newgoogle.maps.Map(document.getElementById("map")asHTMLElement,{zoom:18,center:{lat:37.783,lng:-122.403},});constbounds:Record<number,[[number,number],[number,number]]>={17:[[20969,20970],[50657,50658],],18:[[41939,41940],[101315,101317],],19:[[83878,83881],[202631,202634],],20:[[167757,167763],[405263,405269],],};constimageMapType=newgoogle.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"";}return["https://www.gstatic.com/io2010maps/tiles/5/L2_",zoom,"_",coord.x,"_",coord.y,".png",].join("");},tileSize:newgoogle.maps.Size(256,256),});map.overlayMapTypes.push(imageMapType);}declareglobal{interfaceWindow{initMap:()=>void;}}window.initMap=initMap;
JavaScript
functioninitMap(){constmap=newgoogle.maps.Map(document.getElementById("map"),{zoom:18,center:{lat:37.783,lng:-122.403},});constbounds={17:[[20969,20970],[50657,50658],],18:[[41939,41940],[101315,101317],],19:[[83878,83881],[202631,202634],],20:[[167757,167763],[405263,405269],],};constimageMapType=newgoogle.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"";}return["https://www.gstatic.com/io2010maps/tiles/5/L2_",zoom,"_",coord.x,"_",coord.y,".png",].join("");},tileSize:newgoogle.maps.Size(256,256),});map.overlayMapTypes.push(imageMapType);}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>Overlaying an Image Map Type</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-image-overlayhttps://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 2025-11-21 UTC.