Visualizing thousands of points
This example visualizes recent earthquakes using the deck.gl GeoJsonLayer and a ScatterPlot of earthquakes.
For more information, see https://deck.gl/.
TypeScript
// TODO Use imports when Deck.gl works in more bundlers // https://github.com/visgl/deck.gl/issues/6351#issuecomment-1079424167 import type * as GeoJSON from "geojson"; // import { GeoJsonLayer } from "deck.gl"; // import { GoogleMapsOverlay } from "@deck.gl/google-maps"; const GeoJsonLayer = deck.GeoJsonLayer; const GoogleMapsOverlay = deck.GoogleMapsOverlay; type Properties = { mag: number }; type Feature = GeoJSON.Feature<GeoJSON.Point, Properties>; // Initialize and add the map function initMap(): void { const map = new google.maps.Map( document.getElementById("map") as HTMLElement, { center: { lat: 40, lng: -110 }, zoom: 4, } ); const deckOverlay = new GoogleMapsOverlay({ layers: [ new GeoJsonLayer({ 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 include progress.done(); // hides progress bar /* eslint-enable no-undef */ }, }), ], }); deckOverlay.setMap(map); } declare global { interface Window { initMap: () => void; } } window.initMap = initMap;
JavaScript
// import { GeoJsonLayer } from "deck.gl"; // import { GoogleMapsOverlay } from "@deck.gl/google-maps"; const GeoJsonLayer = deck.GeoJsonLayer; const GoogleMapsOverlay = deck.GoogleMapsOverlay; // Initialize and add the map function initMap() { const map = new google.maps.Map(document.getElementById("map"), { center: { lat: 40, lng: -110 }, zoom: 4, }); const deckOverlay = new GoogleMapsOverlay({ layers: [ new GeoJsonLayer({ 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 include progress.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" class="mdc-linear-progress" aria-label="Data Progress Bar" > <div class="mdc-linear-progress__buffer"> <div class="mdc-linear-progress__buffer-bar"></div> <div class="mdc-linear-progress__buffer-dots"></div> </div> <div class="mdc-linear-progress__bar mdc-linear-progress__primary-bar"> <span class="mdc-linear-progress__bar-inner"></span> </div> <div class="mdc-linear-progress__bar mdc-linear-progress__secondary-bar"> <span class="mdc-linear-progress__bar-inner"></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 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>
Try Sample
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 -b sample-deckgl-points https://github.com/googlemaps/js-samples.git
cd js-samples
npm i
npm start
Other samples can be tried by switching to any branch beginning with sample-SAMPLE_NAME
.
git checkout sample-SAMPLE_NAME
npm i
npm start