Introducing Places UI Kit: A ready-to-use, low-cost component library that lets you bring the familiar Google Maps UI for Places to any map of your choice. Try it out, andshare your input to help shape the future of GMP!
Showing Pixel and Tile Coordinates
This example creates a map that displays a window with the latitude, longitude,and world, pixel, and tile coordinates for Chicago, IL. It also shows how thesevalues change as the zoom level is adjusted.
Read thedocumentation.
TypeScript
functioninitMap():void{constchicago=newgoogle.maps.LatLng(41.85,-87.65);constmap=newgoogle.maps.Map(document.getElementById("map")asHTMLElement,{center:chicago,zoom:3,});constcoordInfoWindow=newgoogle.maps.InfoWindow();coordInfoWindow.setContent(createInfoWindowContent(chicago,map.getZoom()!));coordInfoWindow.setPosition(chicago);coordInfoWindow.open(map);map.addListener("zoom_changed",()=>{coordInfoWindow.setContent(createInfoWindowContent(chicago,map.getZoom()!));coordInfoWindow.open(map);});}constTILE_SIZE=256;functioncreateInfoWindowContent(latLng:google.maps.LatLng,zoom:number){constscale=1 <<zoom;constworldCoordinate=project(latLng);constpixelCoordinate=newgoogle.maps.Point(Math.floor(worldCoordinate.x*scale),Math.floor(worldCoordinate.y*scale));consttileCoordinate=newgoogle.maps.Point(Math.floor((worldCoordinate.x*scale)/TILE_SIZE),Math.floor((worldCoordinate.y*scale)/TILE_SIZE));return["Chicago, IL","LatLng: "+latLng,"Zoom level: "+zoom,"World Coordinate: "+worldCoordinate,"Pixel Coordinate: "+pixelCoordinate,"Tile Coordinate: "+tileCoordinate,].join("<br>");}// The mapping between latitude, longitude and pixels is defined by the web// mercator projection.functionproject(latLng:google.maps.LatLng){letsiny=Math.sin((latLng.lat()*Math.PI)/180);// Truncating to 0.9999 effectively limits latitude to 89.189. This is// about a third of a tile past the edge of the world tile.siny=Math.min(Math.max(siny,-0.9999),0.9999);returnnewgoogle.maps.Point(TILE_SIZE*(0.5+latLng.lng()/360),TILE_SIZE*(0.5-Math.log((1+siny)/(1-siny))/(4*Math.PI)));}declareglobal{interfaceWindow{initMap:()=>void;}}window.initMap=initMap;
JavaScript
functioninitMap(){constchicago=newgoogle.maps.LatLng(41.85,-87.65);constmap=newgoogle.maps.Map(document.getElementById("map"),{center:chicago,zoom:3,});constcoordInfoWindow=newgoogle.maps.InfoWindow();coordInfoWindow.setContent(createInfoWindowContent(chicago,map.getZoom()));coordInfoWindow.setPosition(chicago);coordInfoWindow.open(map);map.addListener("zoom_changed",()=>{coordInfoWindow.setContent(createInfoWindowContent(chicago,map.getZoom()));coordInfoWindow.open(map);});}constTILE_SIZE=256;functioncreateInfoWindowContent(latLng,zoom){constscale=1 <<zoom;constworldCoordinate=project(latLng);constpixelCoordinate=newgoogle.maps.Point(Math.floor(worldCoordinate.x*scale),Math.floor(worldCoordinate.y*scale),);consttileCoordinate=newgoogle.maps.Point(Math.floor((worldCoordinate.x*scale)/TILE_SIZE),Math.floor((worldCoordinate.y*scale)/TILE_SIZE),);return["Chicago, IL","LatLng: "+latLng,"Zoom level: "+zoom,"World Coordinate: "+worldCoordinate,"Pixel Coordinate: "+pixelCoordinate,"Tile Coordinate: "+tileCoordinate,].join("<br>");}// The mapping between latitude, longitude and pixels is defined by the web// mercator projection.functionproject(latLng){letsiny=Math.sin((latLng.lat()*Math.PI)/180);// Truncating to 0.9999 effectively limits latitude to 89.189. This is// about a third of a tile past the edge of the world tile.siny=Math.min(Math.max(siny,-0.9999),0.9999);returnnewgoogle.maps.Point(TILE_SIZE*(0.5+latLng.lng()/360),TILE_SIZE*(0.5-Math.log((1+siny)/(1-siny))/(4*Math.PI)),);}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>Showing Pixel and Tile Coordinates</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-map-coordinateshttps://github.com/googlemaps/js-samples.gitcdjs-samplesnpminpmstart
Other samples can be tried by switching to any branch beginning withsample-SAMPLE_NAME.
gitcheckoutsample-SAMPLE_NAMEnpminpmstart
Except as otherwise noted, the content of this page is licensed under theCreative Commons Attribution 4.0 License, and code samples are licensed under theApache 2.0 License. For details, see theGoogle Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.
Last updated 2025-07-18 UTC.