// This example adds three custom symbols to a polyline.functioninitMap():void{constmap=newgoogle.maps.Map(document.getElementById("map")asHTMLElement,{zoom:6,center:{lat:20.291,lng:153.027},mapTypeId:"terrain",});// Define the custom symbols. All symbols are defined via SVG path notation.// They have varying stroke color, fill color, stroke weight,// opacity and rotation properties.constsymbolOne={path:"M -2,0 0,-2 2,0 0,2 z",strokeColor:"#F00",fillColor:"#F00",fillOpacity:1,};constsymbolTwo={path:"M -1,0 A 1,1 0 0 0 -3,0 1,1 0 0 0 -1,0M 1,0 A 1,1 0 0 0 3,0 1,1 0 0 0 1,0M -3,3 Q 0,5 3,3",strokeColor:"#00F",rotation:45,};constsymbolThree={path:"M -2,-2 2,2 M 2,-2 -2,2",strokeColor:"#292",strokeWeight:4,};// Create the polyline and add the symbols via the 'icons' property.constline=newgoogle.maps.Polyline({path:[{lat:22.291,lng:153.027},{lat:18.291,lng:153.027},],icons:[{icon:symbolOne,offset:"0%",},{icon:symbolTwo,offset:"50%",},{icon:symbolThree,offset:"100%",},],map:map,});}declareglobal{interfaceWindow{initMap:()=>void;}}window.initMap=initMap;
// This example adds three custom symbols to a polyline.functioninitMap(){constmap=newgoogle.maps.Map(document.getElementById("map"),{zoom:6,center:{lat:20.291,lng:153.027},mapTypeId:"terrain",});// Define the custom symbols. All symbols are defined via SVG path notation.// They have varying stroke color, fill color, stroke weight,// opacity and rotation properties.constsymbolOne={path:"M -2,0 0,-2 2,0 0,2 z",strokeColor:"#F00",fillColor:"#F00",fillOpacity:1,};constsymbolTwo={path:"M -1,0 A 1,1 0 0 0 -3,0 1,1 0 0 0 -1,0M 1,0 A 1,1 0 0 0 3,0 1,1 0 0 0 1,0M -3,3 Q 0,5 3,3",strokeColor:"#00F",rotation:45,};constsymbolThree={path:"M -2,-2 2,2 M 2,-2 -2,2",strokeColor:"#292",strokeWeight:4,};// Create the polyline and add the symbols via the 'icons' property.constline=newgoogle.maps.Polyline({path:[{lat:22.291,lng:153.027},{lat:18.291,lng:153.027},],icons:[{icon:symbolOne,offset:"0%",},{icon:symbolTwo,offset:"50%",},{icon:symbolThree,offset:"100%",},],map:map,});}window.initMap=initMap;
/** 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>
<head>
<title>Custom Symbols (Polyline)</title>
<link rel="stylesheet" type="text/css" href="./style.css" />
<script type="module" src="./index.js"></script>
</head>
<body>
<div id="map"></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>
Git and Node.js are required to run this sample locally. Follow theseinstructionsto install Node.js and NPM. The following commands clone, install dependencies and start the sample application.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-09-04 UTC."],[[["\u003cp\u003eThis example demonstrates how to add custom symbols, defined using SVG path notation, to a polyline on a Google Map.\u003c/p\u003e\n"],["\u003cp\u003eYou can customize the appearance of symbols with properties like stroke color, fill color, stroke weight, opacity, and rotation.\u003c/p\u003e\n"],["\u003cp\u003eSymbols are added to the polyline using the \u003ccode\u003eicons\u003c/code\u003e property, specifying the symbol and its offset along the line.\u003c/p\u003e\n"],["\u003cp\u003eThe sample code includes examples in both JavaScript and TypeScript, along with HTML and CSS for creating the map display.\u003c/p\u003e\n"]]],[],null,["This example adds a custom symbol to a polyline.\n\nRead the [documentation](/maps/documentation/javascript/symbols#custom_paths). \n\nTypeScript \n\n```typescript\n// This example adds three custom symbols to a polyline.\n\nfunction initMap(): void {\n const map = new google.maps.Map(\n document.getElementById(\"map\") as HTMLElement,\n {\n zoom: 6,\n center: { lat: 20.291, lng: 153.027 },\n mapTypeId: \"terrain\",\n }\n );\n\n // Define the custom symbols. All symbols are defined via SVG path notation.\n // They have varying stroke color, fill color, stroke weight,\n // opacity and rotation properties.\n const symbolOne = {\n path: \"M -2,0 0,-2 2,0 0,2 z\",\n strokeColor: \"#F00\",\n fillColor: \"#F00\",\n fillOpacity: 1,\n };\n\n const symbolTwo = {\n path: \"M -1,0 A 1,1 0 0 0 -3,0 1,1 0 0 0 -1,0M 1,0 A 1,1 0 0 0 3,0 1,1 0 0 0 1,0M -3,3 Q 0,5 3,3\",\n strokeColor: \"#00F\",\n rotation: 45,\n };\n\n const symbolThree = {\n path: \"M -2,-2 2,2 M 2,-2 -2,2\",\n strokeColor: \"#292\",\n strokeWeight: 4,\n };\n\n // Create the polyline and add the symbols via the 'icons' property.\n const line = new google.maps.Polyline({\n path: [\n { lat: 22.291, lng: 153.027 },\n { lat: 18.291, lng: 153.027 },\n ],\n icons: [\n {\n icon: symbolOne,\n offset: \"0%\",\n },\n {\n icon: symbolTwo,\n offset: \"50%\",\n },\n {\n icon: symbolThree,\n offset: \"100%\",\n },\n ],\n map: map,\n });\n}\n\ndeclare global {\n interface Window {\n initMap: () =\u003e void;\n }\n}\nwindow.initMap = initMap;https://github.com/googlemaps/js-samples/blob/2683f7366fb27829401945d2a7e27d77ed2df8e5/samples/overlay-symbol-custom/index.ts#L8-L73\n```\n| **Note:** Read the [guide](/maps/documentation/javascript/using-typescript) on using TypeScript and Google Maps.\n\nJavaScript \n\n```javascript\n// This example adds three custom symbols to a polyline.\nfunction initMap() {\n const map = new google.maps.Map(document.getElementById(\"map\"), {\n zoom: 6,\n center: { lat: 20.291, lng: 153.027 },\n mapTypeId: \"terrain\",\n });\n // Define the custom symbols. All symbols are defined via SVG path notation.\n // They have varying stroke color, fill color, stroke weight,\n // opacity and rotation properties.\n const symbolOne = {\n path: \"M -2,0 0,-2 2,0 0,2 z\",\n strokeColor: \"#F00\",\n fillColor: \"#F00\",\n fillOpacity: 1,\n };\n const symbolTwo = {\n path: \"M -1,0 A 1,1 0 0 0 -3,0 1,1 0 0 0 -1,0M 1,0 A 1,1 0 0 0 3,0 1,1 0 0 0 1,0M -3,3 Q 0,5 3,3\",\n strokeColor: \"#00F\",\n rotation: 45,\n };\n const symbolThree = {\n path: \"M -2,-2 2,2 M 2,-2 -2,2\",\n strokeColor: \"#292\",\n strokeWeight: 4,\n };\n // Create the polyline and add the symbols via the 'icons' property.\n const line = new google.maps.Polyline({\n path: [\n { lat: 22.291, lng: 153.027 },\n { lat: 18.291, lng: 153.027 },\n ],\n icons: [\n {\n icon: symbolOne,\n offset: \"0%\",\n },\n {\n icon: symbolTwo,\n offset: \"50%\",\n },\n {\n icon: symbolThree,\n offset: \"100%\",\n },\n ],\n map: map,\n });\n}\n\nwindow.initMap = initMap;https://github.com/googlemaps/js-samples/blob/2683f7366fb27829401945d2a7e27d77ed2df8e5/dist/samples/overlay-symbol-custom/docs/index.js#L7-L59\n```\n| **Note:** The JavaScript is compiled from the TypeScript snippet.\n\nCSS \n\n```css\n/* \n * Always set the map height explicitly to define the size of the div element\n * that contains the map. \n */\n#map {\n height: 100%;\n}\n\n/* \n * Optional: Makes the sample page fill the window. \n */\nhtml,\nbody {\n height: 100%;\n margin: 0;\n padding: 0;\n}\nhttps://github.com/googlemaps/js-samples/blob/2683f7366fb27829401945d2a7e27d77ed2df8e5/dist/samples/overlay-symbol-custom/docs/style.css#L7-L24\n```\n\nHTML \n\n```html\n\u003chtml\u003e\n \u003chead\u003e\n \u003ctitle\u003eCustom Symbols (Polyline)\u003c/title\u003e\n\n \u003clink rel=\"stylesheet\" type=\"text/css\" href=\"./style.css\" /\u003e\n \u003cscript type=\"module\" src=\"./index.js\"\u003e\u003c/script\u003e\n \u003c/head\u003e\n \u003cbody\u003e\n \u003cdiv id=\"map\"\u003e\u003c/div\u003e\n\n \u003c!-- \n The `defer` attribute causes the script to execute after the full HTML\n document has been parsed. For non-blocking uses, avoiding race conditions,\n and consistent behavior across browsers, consider loading using Promises. See\n https://developers.google.com/maps/documentation/javascript/load-maps-js-api\n for more information.\n --\u003e\n \u003cscript\n src=\"https://maps.googleapis.com/maps/api/js?key=AIzaSyB41DRUbKWJHPxaFjMAwdrzWzbVKartNGg&callback=initMap&v=weekly\"\n defer\n \u003e\u003c/script\u003e\n \u003c/body\u003e\n\u003c/html\u003ehttps://github.com/googlemaps/js-samples/blob/2683f7366fb27829401945d2a7e27d77ed2df8e5/dist/samples/overlay-symbol-custom/docs/index.html#L8-L30\n```\n\nTry Sample \n[JSFiddle.net](https://jsfiddle.net/gh/get/library/pure/googlemaps/js-samples/tree/master/dist/samples/overlay-symbol-custom/jsfiddle) [Google Cloud Shell](https://ssh.cloud.google.com/cloudshell/editor?cloudshell_git_repo=https%3A%2F%2Fgithub.com%2Fgooglemaps%2Fjs-samples&cloudshell_git_branch=sample-overlay-symbol-custom&cloudshell_tutorial=cloud_shell_instructions.md&cloudshell_workspace=.)\n\nClone Sample\n\n\nGit and Node.js are required to run this sample locally. Follow these [instructions](https://docs.npmjs.com/downloading-and-installing-node-js-and-npm) to install Node.js and NPM. The following commands clone, install dependencies and start the sample application. \n\n git clone -b sample-overlay-symbol-custom https://github.com/googlemaps/js-samples.git\n cd js-samples\n npm i\n npm start\n\n\nOther samples can be tried by switching to any branch beginning with `sample-`\u003cvar translate=\"no\"\u003eSAMPLE_NAME\u003c/var\u003e. \n\n git checkout sample-\u003cvar translate=\"no\"\u003e\u003cspan class=\"devsite-syntax-nx\"\u003eSAMPLE_NAME\u003c/span\u003e\u003c/var\u003e\n npm i\n npm start"]]
