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Data Layer: Styling

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Page Summary

This example demonstrates how to add custom shapes to a Google Map using the data layer and GeoJSON data.
It showcases styling these shapes by setting fill color and stroke width using map.data.setStyle().
The sample provides code snippets in TypeScript, JavaScript, CSS, and HTML to illustrate the implementation.
Users can interact with a live example through provided links to JSFiddle and Google Cloud Shell.
Instructions for cloning and running the sample locally using Git and Node.js are included.

This example uses the data layer to add some custom shapes to a map, and shows how to apply styles to those shapes

Read the documentation.

[フレーム]

TypeScript

letmap:google.maps.Map;
functioninitMap():void{
map=newgoogle.maps.Map(document.getElementById("map")asHTMLElement,{
zoom:4,
center:{lat:-28,lng:137},
});
// Load GeoJSON.
map.data.loadGeoJson(
"https://storage.googleapis.com/mapsdevsite/json/google.json"
);
// Set the stroke width, and fill color for each polygon
map.data.setStyle({
fillColor:"green",
strokeWeight:1,
});
}
declareglobal{
interfaceWindow{
initMap:()=>void;
}
}
window.initMap=initMap;index.ts

JavaScript

letmap;
functioninitMap(){
map=newgoogle.maps.Map(document.getElementById("map"),{
zoom:4,
center:{lat:-28,lng:137},
});
// Load GeoJSON.
map.data.loadGeoJson(
"https://storage.googleapis.com/mapsdevsite/json/google.json",
);
// Set the stroke width, and fill color for each polygon
map.data.setStyle({
fillColor:"green",
strokeWeight:1,
});
}
window.initMap=initMap;index.js

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;
}
style.css

HTML

<html>
 <head>
 <title>Data Layer: Styling</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>index.html

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.

gitclone-bsample-layer-data-stylehttps://github.com/googlemaps/js-samples.git
cdjs-samples
npmi
npmstart

Other samples can be tried by switching to any branch beginning with sample-SAMPLE_NAME.

gitcheckoutsample-SAMPLE_NAME
npmi
npmstart