googlemaps-samples · willum070 · Mar 6, 2026 · Mar 12, 2026 · Mar 13, 2026 · Mar 13, 2026
diff --git a/samples/deckgl-points/README.md b/samples/deckgl-points/README.md
@@ -0,0 +1,41 @@
+# Google Maps JavaScript Sample
+
+## deckgl-points
+
+This example visualizes recent earthquakes using the deck.gl GeoJsonLayer and a ScatterPlot of earthquakes.
+
+## Setup
+
+### Before starting run:
+
+`npm i`
+
+### Run an example on a local web server
+
+`cd samples/deckgl-points`
+`npm start`
+
+### Build an individual example
+
+`cd samples/deckgl-points`
+`npm run build`
+
+From 'samples':
+
+`npm run build --workspace=deckgl-points/`
+
+### Build all of the examples.
+
+From 'samples':
+
+`npm run build-all`
+
+### Run lint to check for problems
+
+`cd samples/deckgl-points`
+`npx eslint index.ts` 
+
+## Feedback
+
+For feedback related to this sample, please open a new issue on
+[GitHub](https://github.com/googlemaps-samples/js-api-samples/issues).
diff --git a/samples/deckgl-points/index.html b/samples/deckgl-points/index.html
@@ -0,0 +1,21 @@
+<!doctype html>
+<!--
+ @license
+ Copyright 2026 Google LLC. All Rights Reserved.
+ SPDX-License-Identifier: Apache-2.0
+-->
+<!-- [START maps_deckgl_points] -->
+<html>
+    <head>
+        <title>deck.gl and Google Maps Platform</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="40, -110" zoom="4" map-id="DEMO_MAP_ID"></gmp-map>
+    </body>
+</html>
+<!-- [END maps_deckgl_points] -->
diff --git a/samples/deckgl-points/index.ts b/samples/deckgl-points/index.ts
@@ -0,0 +1,82 @@
+/**
+ * @license
+ * Copyright 2026 Google LLC. All Rights Reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+// [START maps_deckgl_points]
+//import type * as GeoJSON from 'geojson';
+import { Feature } from 'geojson';
+import { GoogleMapsOverlay } from '@deck.gl/google-maps';
+import { GeoJsonLayer } from '@deck.gl/layers';
+
+type Properties = { mag: number };
+
+const mapElement = document.querySelector('gmp-map') as google.maps.MapElement;
+let innerMap: google.maps.Map;
+
+interface EarthquakeProperties {
+    mag: number;
+    place: string;
+    time: number;
+}
+
+/**
+ * Validates that a feature has the properties we need for rendering.
+ */
+function isEarthquake(f: Feature): f is Feature & { properties: EarthquakeProperties } {
+  return (
+    f.properties !== null &&
+    typeof f.properties === 'object' &&
+    typeof (f.properties as any).mag === 'number'
+  );
+}
+
+// Initialize and add the map
+async function initMap() {
+    //  Request the needed libraries.
+    await google.maps.importLibrary('maps');
+
+    innerMap = await mapElement.innerMap;
+
+    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,
+                getPointRadius: (f: Feature): number => {
+                    if (isEarthquake(f)) {
+                        return Math.pow(10, f.properties.mag);
+                    }
+                    return 0; // Fallback for invalid data.
+                },
+                getFillColor: (f: Feature): [number, number, number, number] => {
+                    return [255, 70, 30, 180]; // Default color for other earthquakes.
+                },
+                autoHighlight: true,
+                transitions: {
+                    getPointRadius: {
+                        type: 'spring',
+                        stiffness: 0.1,
+                        damping: 0.15,
+                        enter: () => [0], // grow from size 0,
+                        duration: 10000,
+                    },
+                },
+                onDataLoad: () => {
+                    console.log('Data is loaded.');
+                },
+            }),
+        ],
+    });
+
+    deckOverlay.setMap(innerMap);
+}
+
+initMap();
+// [END maps_deckgl_points]
diff --git a/samples/deckgl-points/package.json b/samples/deckgl-points/package.json
@@ -0,0 +1,17 @@
+{
+  "name": "@js-api-samples/deckgl-points",
+  "version": "1.0.0",
+  "scripts": {
+    "build": "tsc && bash ../jsfiddle.sh deckgl-points && bash ../app.sh deckgl-points && bash ../docs.sh deckgl-points && npm run build:vite --workspace=. && bash ../dist.sh deckgl-points",
+    "test": "tsc && npm run build:vite --workspace=.",
+    "start": "tsc && vite build --base './' && vite",
+    "build:vite": "vite build --base './'",
+    "preview": "vite preview"
+  },
+  "dependencies": {
+    "@deck.gl/core": "^8.9.0",
+    "@deck.gl/google-maps": "^8.9.0",
+    "@deck.gl/layers": "^8.9.0",
+    "deck.gl": "^8.9.0"
+  }
+}
diff --git a/samples/deckgl-points/style.css b/samples/deckgl-points/style.css
@@ -0,0 +1,28 @@
+/**
+ * @license
+ * Copyright 2026 Google LLC. All Rights Reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+:root {
+    --mdc-theme-primary: #1a73e8;
+    --mdc-theme-secondary: #rgb(225, 245, 254);
+    --mdc-theme-on-primary: #fff;
+    --mdc-theme-on-secondary: rgb(1, 87, 155);
+}
+
+.mdc-text-field--focused:not(.mdc-text-field--disabled) .mdc-floating-label {
+    color: var(--mdc-theme-primary);
+}
+
+/* [START maps_deckgl_points] */
+/* 
+ * Optional: Makes the sample page fill the window. 
+ */
+html,
+body {
+    height: 100%;
+    margin: 0;
+    padding: 0;
+}
+
+/* [END maps_deckgl_points] */
diff --git a/samples/deckgl-points/tsconfig.json b/samples/deckgl-points/tsconfig.json
@@ -0,0 +1,17 @@
+{
+  "compilerOptions": {
+    "module": "esnext",
+    "target": "esnext",
+    "strict": true,
+    "noImplicitAny": false,
+    "lib": [
+      "es2015",
+      "esnext",
+      "es6",
+      "dom",
+      "dom.iterable"
+    ],
+    "moduleResolution": "Node",
+    "jsx": "preserve"
+  }
+}