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Style polyline data features

This example shows an approach to styling polyline geometry based data features.

Read the documentation .

TypeScript

 const 
  
 mapElement 
  
 = 
  
 document 
 . 
 querySelector 
 ( 
 'gmp-map' 
 ) 
  
 as 
  
 google 
 . 
 maps 
 . 
 MapElement 
 ; 
 let 
  
 innerMap 
 ; 
 async 
  
 function 
  
 initMap 
 () 
  
 { 
  
 // Request needed libraries. 
  
 ( 
 await 
  
 google 
 . 
 maps 
 . 
 importLibrary 
 ( 
 'maps' 
 )) 
  
 as 
  
 google 
 . 
 maps 
 . 
 MapsLibrary 
 ; 
  
 // Get the inner map. 
  
 innerMap 
  
 = 
  
 mapElement 
 . 
 innerMap 
 ; 
  
 // Dataset ID for Seattle Bridges 
  
 const 
  
 datasetId 
  
 = 
  
 '2438ee30-5366-4e84-82b7-a0d4dd1893fa' 
 ; 
  
 const 
  
 datasetLayer 
  
 = 
  
 innerMap 
 . 
 getDatasetFeatureLayer 
 ( 
 datasetId 
 ); 
  
 // Apply style to all features. 
  
 datasetLayer 
 . 
 style 
  
 = 
  
 { 
  
 strokeColor 
 : 
  
 'green' 
 , 
  
 strokeWeight 
 : 
  
 4 
  
 }; 
 } 
 initMap 
 (); 
   index 
 . 
 ts

JavaScript

 const 
  
 mapElement 
  
 = 
  
 document 
 . 
 querySelector 
 ( 
 'gmp-map' 
 ); 
 let 
  
 innerMap 
 ; 
 async 
  
 function 
  
 initMap 
 () 
  
 { 
  
 // Request needed libraries. 
  
 ( 
 await 
  
 google 
 . 
 maps 
 . 
 importLibrary 
 ( 
 'maps' 
 )); 
  
 // Get the inner map. 
  
 innerMap 
  
 = 
  
 mapElement 
 . 
 innerMap 
 ; 
  
 // Dataset ID for Seattle Bridges 
  
 const 
  
 datasetId 
  
 = 
  
 '2438ee30-5366-4e84-82b7-a0d4dd1893fa' 
 ; 
  
 const 
  
 datasetLayer 
  
 = 
  
 innerMap 
 . 
 getDatasetFeatureLayer 
 ( 
 datasetId 
 ); 
  
 // Apply style to all features. 
  
 datasetLayer 
 . 
 style 
  
 = 
  
 { 
  
 strokeColor 
 : 
  
 'green' 
 , 
  
 strokeWeight 
 : 
  
 4 
  
 }; 
 } 
 initMap 
 (); 
   index 
 . 
 js

CSS

 /* 
 * Optional: Makes the sample page fill the window. 
 */ 
 html 
 , 
 body 
  
 { 
  
 height 
 : 
  
 100 
 % 
 ; 
  
 margin 
 : 
  
 0 
 ; 
  
 padding 
 : 
  
 0 
 ; 
 } 
 # 
 attribution 
  
 { 
  
 background-color 
 : 
  
 rgba 
 ( 
 255 
 , 
  
 255 
 , 
  
 255 
 , 
  
 0.7 
 ); 
  
 font-family 
 : 
  
 "Roboto" 
 , 
  
 "Arial" 
 , 
  
 "sans-serif" 
 ; 
  
 font-size 
 : 
  
 10 
 px 
 ; 
  
 padding 
 : 
  
 2 
 px 
 ; 
  
 margin 
 : 
  
 2 
 px 
 ; 
 } 
   style 
 . 
 css

HTML

<html>
    <head>
        <title>Style a polyline data feature</title>

        <link rel="stylesheet" type="text/css" href="./style.css" />
        <script type="module" src="./index.js"></script>
        <!-- prettier-ignore -->
        <script>(g=>{var h,a,k,p="The Google Maps JavaScript API",c="google",l="importLibrary",q="__ib__",m=document,b=window;b=b[c]||(b[c]={});var d=b.maps||(b.maps={}),r=new Set,e=new URLSearchParams,u=()=>h||(h=new Promise(async(f,n)=>{await (a=m.createElement("script"));e.set("libraries",[...r]+"");for(k in g)e.set(k.replace(/[A-Z]/g,t=>"_"+t[0].toLowerCase()),g[k]);e.set("callback",c+".maps."+q);a.src=`https://maps.${c}apis.com/maps/api/js?`+e;d[q]=f;a.onerror=()=>h=n(Error(p+" could not load."));a.nonce=m.querySelector("script[nonce]")?.nonce||"";m.head.append(a)}));d[l]?console.warn(p+" only loads once. Ignoring:",g):d[l]=(f,...n)=>r.add(f)&&u().then(()=>d[l](f,...n))})
        ({key: "AIzaSyA6myHzS10YXdcazAFalmXvDkrYCp5cLc8", v: "weekly" });</script>
    </head>
    <body>
        <gmp-map
            center="47.59, -122.31"
            zoom="14"
            map-id="5cd2c9ca1cf05670"
            map-type-control="false">
            <div id="attribution" slot="control-block-end-inline-start">
                Data source: NYC Open Data
            </div>
        </gmp-map>
    </body>
</html>  index.html

Try Sample

JSFiddle.net

Clone Sample

Git and Node.js are required to run this sample locally. Follow these instructions to install Node.js and NPM. The following commands clone, install dependencies and start the sample application.

  
  git 
  
 clone 
  
 https 
 : 
 //github.com/googlemaps-samples/js-api-samples.git 
 
  
  cd 
  
 samples 
 / 
 dds 
 - 
 datasets 
 - 
 polyline 
 
  
  npm 
  
 i 
 
  
  npm 
  
 start