Google Maps and deck.gl GeoJsonLayer
AI-generated Key Takeaways
This example demonstrates visualizing a large number of data points, specifically earthquake locations, on a Google Map using deck.gl's GeoJsonLayer and ScatterplotOverlay.
It fetches earthquake data from a USGS GeoJSON feed and dynamically renders points on the map, scaling their size based on magnitude.
The visualization utilizes deck.gl transitions for a smooth, animated appearance of data points.
The code provides both TypeScript and JavaScript implementations, offering flexibility for developers.
Users can interact with the visualization through a live demo on JSFiddle or explore the source code via provided links.
Visualizing thousands of points
This example visualizes recent earthquakes using the deck.gl GeoJsonLayer and aScatterPlot of earthquakes.
For more information, seehttps://deck.gl/.
TypeScript
// TODO Use imports when Deck.gl works in more bundlers// https://github.com/visgl/deck.gl/issues/6351#issuecomment-1079424167importtype*asGeoJSONfrom"geojson";// import { GeoJsonLayer } from "deck.gl";// import { GoogleMapsOverlay } from "@deck.gl/google-maps";constGeoJsonLayer=deck.GeoJsonLayer;constGoogleMapsOverlay=deck.GoogleMapsOverlay;typeProperties={mag:number};typeFeature=GeoJSON.Feature<GeoJSON.Point,Properties>;// Initialize and add the mapfunctioninitMap():void{constmap=newgoogle.maps.Map(document.getElementById("map")asHTMLElement,{center:{lat:40,lng:-110},zoom:4,});constdeckOverlay=newGoogleMapsOverlay({layers:[newGeoJsonLayer({id:"earthquakes",data:"https://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/all_month.geojson",filled:true,pointRadiusMinPixels:2,pointRadiusMaxPixels:200,opacity:0.4,pointRadiusScale:0.3,getRadius:(f:Feature)=>Math.pow(10,f.properties.mag),getFillColor:[255,70,30,180],autoHighlight:true,transitions:{getRadius:{type:"spring",stiffness:0.1,damping:0.15,enter:()=>[0],// grow from size 0,duration:10000,},},onDataLoad:()=>{/* eslint-disable no-undef */// @ts-ignore defined in includeprogress.done();// hides progress bar/* eslint-enable no-undef */},}),],});deckOverlay.setMap(map);}declareglobal{interfaceWindow{initMap:()=>void;}}window.initMap=initMap;
JavaScript
// import { GeoJsonLayer } from "deck.gl";// import { GoogleMapsOverlay } from "@deck.gl/google-maps";constGeoJsonLayer=deck.GeoJsonLayer;constGoogleMapsOverlay=deck.GoogleMapsOverlay;// Initialize and add the mapfunctioninitMap(){constmap=newgoogle.maps.Map(document.getElementById("map"),{center:{lat:40,lng:-110},zoom:4,});constdeckOverlay=newGoogleMapsOverlay({layers:[newGeoJsonLayer({id:"earthquakes",data:"https://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/all_month.geojson",filled:true,pointRadiusMinPixels:2,pointRadiusMaxPixels:200,opacity:0.4,pointRadiusScale:0.3,getRadius:(f)=>Math.pow(10,f.properties.mag),getFillColor:[255,70,30,180],autoHighlight:true,transitions:{getRadius:{type:"spring",stiffness:0.1,damping:0.15,enter:()=>[0],// grow from size 0,duration:10000,},},onDataLoad:()=>{/* eslint-disable no-undef */// @ts-ignore defined in includeprogress.done();// hides progress bar/* eslint-enable no-undef */},}),],});deckOverlay.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>deck.gl and Google Maps Platform</title> <!-- Use Material Design Progress indicator --> <link href="https://unpkg.com/material-components-web@6.0.0/dist/material-components-web.css" rel="stylesheet" /> <script src="https://unpkg.com/material-components-web@6.0.0/dist/material-components-web.min.js"></script> <script src="https://unpkg.com/deck.gl@8.9.22/dist.min.js"></script> <script src="https://unpkg.com/@deck.gl/google-maps@8.9.22/dist.min.js"></script> <link rel="stylesheet" type="text/css" href="./style.css" /> <script type="module" src="./index.js"></script> </head> <body> <div role="progressbar" aria-label="Data Progress Bar" > <div> <div></div> <div></div> </div> <div> <span></span> </div> <div> <span></span> </div> </div> <script> var progress, progressDiv; progressDiv = document.querySelector(".mdc-linear-progress"); progress = new mdc.linearProgress.MDCLinearProgress(progressDiv); progress.open(); progress.determinate = false; progress.done = function () { progress.close(); progressDiv.remove(); }; </script> <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-deckgl-pointshttps://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 2025-11-21 UTC.