Simple Polygon
Page Summary
This example demonstrates how to create a simple polygon on a Google Map, using the Bermuda Triangle as a case study.
It provides code snippets in TypeScript and JavaScript for defining the polygon's coordinates, appearance, and placement on the map.
The example utilizes the Google Maps JavaScript API and requires an API key for implementation.
You can interact with a live version of the example through provided links to JSFiddle and Google Cloud Shell.
Users can clone and run the sample locally with Git and Node.js by following the given instructions.
This example creates a map with a simple polygon representing the BermudaTriangle.
Read thedocumentation.
TypeScript
// This example creates a simple polygon representing the Bermuda Triangle.functioninitMap():void{constmap=newgoogle.maps.Map(document.getElementById("map")asHTMLElement,{zoom:5,center:{lat:24.886,lng:-70.268},mapTypeId:"terrain",});// Define the LatLng coordinates for the polygon's path.consttriangleCoords=[{lat:25.774,lng:-80.19},{lat:18.466,lng:-66.118},{lat:32.321,lng:-64.757},{lat:25.774,lng:-80.19},];// Construct the polygon.constbermudaTriangle=newgoogle.maps.Polygon({paths:triangleCoords,strokeColor:"#FF0000",strokeOpacity:0.8,strokeWeight:2,fillColor:"#FF0000",fillOpacity:0.35,});bermudaTriangle.setMap(map);}declareglobal{interfaceWindow{initMap:()=>void;}}window.initMap=initMap;
JavaScript
// This example creates a simple polygon representing the Bermuda Triangle.functioninitMap(){constmap=newgoogle.maps.Map(document.getElementById("map"),{zoom:5,center:{lat:24.886,lng:-70.268},mapTypeId:"terrain",});// Define the LatLng coordinates for the polygon's path.consttriangleCoords=[{lat:25.774,lng:-80.19},{lat:18.466,lng:-66.118},{lat:32.321,lng:-64.757},{lat:25.774,lng:-80.19},];// Construct the polygon.constbermudaTriangle=newgoogle.maps.Polygon({paths:triangleCoords,strokeColor:"#FF0000",strokeOpacity:0.8,strokeWeight:2,fillColor:"#FF0000",fillOpacity:0.35,});bermudaTriangle.setMap(map);}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>Simple Polygon</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-polygon-simplehttps://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.