This example creates three different presentation styles for a dataset from the USGS recent earthquakes feed.
Check out the reference documentation for the data layer.
Default style
Default style: map
Default style: code example
TypeScript
let map: google.maps.Map;
function initMap(): void {
map = new google.maps.Map(document.getElementById("map") as HTMLElement, {
center: { lat: 20, lng: -160 },
zoom: 2,
});
// Get the earthquake data (JSONP format)
// This feed is a copy from the USGS feed, you can find the originals here:
// http://earthquake.usgs.gov/earthquakes/feed/v1.0/geojson.php
const script = document.createElement("script");
script.setAttribute(
"src",
"https://storage.googleapis.com/mapsdevsite/json/quakes.geo.json"
);
document.getElementsByTagName("head")[0].appendChild(script);
}
// Defines the callback function referenced in the jsonp file.
function eqfeed_callback(data: any) {
map.data.addGeoJson(data);
}
JavaScript
let map;
function initMap() {
map = new google.maps.Map(document.getElementById("map"), {
center: { lat: 20, lng: -160 },
zoom: 2,
});
// Get the earthquake data (JSONP format)
// This feed is a copy from the USGS feed, you can find the originals here:
// http://earthquake.usgs.gov/earthquakes/feed/v1.0/geojson.php
const script = document.createElement("script");
script.setAttribute(
"src",
"https://storage.googleapis.com/mapsdevsite/json/quakes.geo.json"
);
document.getElementsByTagName("head")[0].appendChild(script);
}
// Defines the callback function referenced in the jsonp file.
function eqfeed_callback(data) {
map.data.addGeoJson(data);
}
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
<!DOCTYPE html>
<html>
<head>
<title>Default Data Layer: Earthquakes</title>
<script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
<link rel="stylesheet" type="text/css" href="./style.css" />
<script src="./index.js"></script>
</head>
<body>
<div id="map"></div>
<!-- Async script executes immediately and must be after any DOM elements used in callback. -->
<script
src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap&libraries=&v=weekly"
async
></script>
</body>
</html>
All
<!DOCTYPE html>
<html>
<head>
<title>Default Data Layer: Earthquakes</title>
<script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
<style type="text/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>
<script>
let map;
function initMap() {
map = new google.maps.Map(document.getElementById("map"), {
center: { lat: 20, lng: -160 },
zoom: 2,
});
// Get the earthquake data (JSONP format)
// This feed is a copy from the USGS feed, you can find the originals here:
// http://earthquake.usgs.gov/earthquakes/feed/v1.0/geojson.php
const script = document.createElement("script");
script.setAttribute(
"src",
"https://storage.googleapis.com/mapsdevsite/json/quakes.geo.json"
);
document.getElementsByTagName("head")[0].appendChild(script);
}
// Defines the callback function referenced in the jsonp file.
function eqfeed_callback(data) {
map.data.addGeoJson(data);
}
</script>
</head>
<body>
<div id="map"></div>
<!-- Async script executes immediately and must be after any DOM elements used in callback. -->
<script
src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap&libraries=&v=weekly"
async
></script>
</body>
</html>
let map;
function initMap() {
map = new google.maps.Map(document.getElementById("map"), {
center: { lat: 20, lng: -160 },
zoom: 2,
});
// Get the earthquake data (JSONP format)
// This feed is a copy from the USGS feed, you can find the originals here:
// http://earthquake.usgs.gov/earthquakes/feed/v1.0/geojson.php
const script = document.createElement("script");
script.setAttribute(
"src",
"https://storage.googleapis.com/mapsdevsite/json/quakes.geo.json"
);
document.getElementsByTagName("head")[0].appendChild(script);
}
// Defines the callback function referenced in the jsonp file.
function eqfeed_callback(data) {
map.data.addGeoJson(data);
}
/* 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;
}
<!DOCTYPE html>
<html>
<head>
<title>Default Data Layer: Earthquakes</title>
<script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
<!-- jsFiddle will insert css and js -->
</head>
<body>
<div id="map"></div>
<!-- Async script executes immediately and must be after any DOM elements used in callback. -->
<script
src="https://maps.googleapis.com/maps/api/js?key=AIzaSyBIwzALxUPNbatRBj3Xi1Uhp0fFzwWNBkE&callback=initMap&libraries=&v=weekly"
async
></script>
</body>
</html>
Simple style
Simple style: map
Simple style: code example
TypeScript
let map: google.maps.Map;
function initMap(): void {
map = new google.maps.Map(document.getElementById("map") as HTMLElement, {
center: { lat: 20, lng: -160 },
zoom: 2,
});
// Get the earthquake data (JSONP format)
// This feed is a copy from the USGS feed, you can find the originals here:
// http://earthquake.usgs.gov/earthquakes/feed/v1.0/geojson.php
const script = document.createElement("script");
script.setAttribute(
"src",
"https://storage.googleapis.com/mapsdevsite/json/quakes.geo.json"
);
document.getElementsByTagName("head")[0].appendChild(script);
// Add a basic style.
map.data.setStyle((feature) => {
const mag = Math.exp(parseFloat(feature.getProperty("mag"))) * 0.1;
return /** @type {google.maps.Data.StyleOptions} */ {
icon: {
path: google.maps.SymbolPath.CIRCLE,
scale: mag,
fillColor: "#f00",
fillOpacity: 0.35,
strokeWeight: 0,
},
};
});
}
// Defines the callback function referenced in the jsonp file.
function eqfeed_callback(data: any) {
map.data.addGeoJson(data);
}
JavaScript
let map;
function initMap() {
map = new google.maps.Map(document.getElementById("map"), {
center: { lat: 20, lng: -160 },
zoom: 2,
});
// Get the earthquake data (JSONP format)
// This feed is a copy from the USGS feed, you can find the originals here:
// http://earthquake.usgs.gov/earthquakes/feed/v1.0/geojson.php
const script = document.createElement("script");
script.setAttribute(
"src",
"https://storage.googleapis.com/mapsdevsite/json/quakes.geo.json"
);
document.getElementsByTagName("head")[0].appendChild(script);
// Add a basic style.
map.data.setStyle((feature) => {
const mag = Math.exp(parseFloat(feature.getProperty("mag"))) * 0.1;
return /** @type {google.maps.Data.StyleOptions} */ {
icon: {
path: google.maps.SymbolPath.CIRCLE,
scale: mag,
fillColor: "#f00",
fillOpacity: 0.35,
strokeWeight: 0,
},
};
});
}
// Defines the callback function referenced in the jsonp file.
function eqfeed_callback(data) {
map.data.addGeoJson(data);
}
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
<!DOCTYPE html>
<html>
<head>
<title>Simple Data Layer: Earthquakes</title>
<script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
<link rel="stylesheet" type="text/css" href="./style.css" />
<script src="./index.js"></script>
</head>
<body>
<div id="map"></div>
<!-- Async script executes immediately and must be after any DOM elements used in callback. -->
<script
src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap&libraries=&v=weekly"
async
></script>
</body>
</html>
All
<!DOCTYPE html>
<html>
<head>
<title>Simple Data Layer: Earthquakes</title>
<script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
<style type="text/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>
<script>
let map;
function initMap() {
map = new google.maps.Map(document.getElementById("map"), {
center: { lat: 20, lng: -160 },
zoom: 2,
});
// Get the earthquake data (JSONP format)
// This feed is a copy from the USGS feed, you can find the originals here:
// http://earthquake.usgs.gov/earthquakes/feed/v1.0/geojson.php
const script = document.createElement("script");
script.setAttribute(
"src",
"https://storage.googleapis.com/mapsdevsite/json/quakes.geo.json"
);
document.getElementsByTagName("head")[0].appendChild(script);
// Add a basic style.
map.data.setStyle((feature) => {
const mag = Math.exp(parseFloat(feature.getProperty("mag"))) * 0.1;
return /** @type {google.maps.Data.StyleOptions} */ {
icon: {
path: google.maps.SymbolPath.CIRCLE,
scale: mag,
fillColor: "#f00",
fillOpacity: 0.35,
strokeWeight: 0,
},
};
});
}
// Defines the callback function referenced in the jsonp file.
function eqfeed_callback(data) {
map.data.addGeoJson(data);
}
</script>
</head>
<body>
<div id="map"></div>
<!-- Async script executes immediately and must be after any DOM elements used in callback. -->
<script
src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap&libraries=&v=weekly"
async
></script>
</body>
</html>
let map;
function initMap() {
map = new google.maps.Map(document.getElementById("map"), {
center: { lat: 20, lng: -160 },
zoom: 2,
});
// Get the earthquake data (JSONP format)
// This feed is a copy from the USGS feed, you can find the originals here:
// http://earthquake.usgs.gov/earthquakes/feed/v1.0/geojson.php
const script = document.createElement("script");
script.setAttribute(
"src",
"https://storage.googleapis.com/mapsdevsite/json/quakes.geo.json"
);
document.getElementsByTagName("head")[0].appendChild(script);
// Add a basic style.
map.data.setStyle((feature) => {
const mag = Math.exp(parseFloat(feature.getProperty("mag"))) * 0.1;
return /** @type {google.maps.Data.StyleOptions} */ {
icon: {
path: google.maps.SymbolPath.CIRCLE,
scale: mag,
fillColor: "#f00",
fillOpacity: 0.35,
strokeWeight: 0,
},
};
});
}
// Defines the callback function referenced in the jsonp file.
function eqfeed_callback(data) {
map.data.addGeoJson(data);
}
/* 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;
}
<!DOCTYPE html>
<html>
<head>
<title>Simple Data Layer: Earthquakes</title>
<script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
<!-- jsFiddle will insert css and js -->
</head>
<body>
<div id="map"></div>
<!-- Async script executes immediately and must be after any DOM elements used in callback. -->
<script
src="https://maps.googleapis.com/maps/api/js?key=AIzaSyBIwzALxUPNbatRBj3Xi1Uhp0fFzwWNBkE&callback=initMap&libraries=&v=weekly"
async
></script>
</body>
</html>
Advanced style
Advanced style: map
Advanced style: code example
TypeScript
let map: google.maps.Map;
function initMap(): void {
map = new google.maps.Map(document.getElementById("map") as HTMLElement, {
center: { lat: 20, lng: -160 },
zoom: 2,
styles: mapStyle,
});
map.data.setStyle(styleFeature);
// Get the earthquake data (JSONP format)
// This feed is a copy from the USGS feed, you can find the originals here:
// http://earthquake.usgs.gov/earthquakes/feed/v1.0/geojson.php
const script = document.createElement("script");
script.setAttribute(
"src",
"https://storage.googleapis.com/mapsdevsite/json/quakes.geo.json"
);
document.getElementsByTagName("head")[0].appendChild(script);
}
// Defines the callback function referenced in the jsonp file.
function eqfeed_callback(data: any) {
map.data.addGeoJson(data);
}
function styleFeature(feature: google.maps.Data.Feature) {
const low = [151, 83, 34]; // color of mag 1.0
const high = [5, 69, 54]; // color of mag 6.0 and above
const minMag = 1.0;
const maxMag = 6.0;
// fraction represents where the value sits between the min and max
const fraction =
(Math.min(feature.getProperty("mag"), maxMag) - minMag) / (maxMag - minMag);
const color = interpolateHsl(low, high, fraction);
return {
icon: {
path: google.maps.SymbolPath.CIRCLE,
strokeWeight: 0.5,
strokeColor: "#fff",
fillColor: color,
fillOpacity: 2 / feature.getProperty("mag"),
// while an exponent would technically be correct, quadratic looks nicer
scale: Math.pow(feature.getProperty("mag"), 2),
},
zIndex: Math.floor(feature.getProperty("mag")),
};
}
function interpolateHsl(lowHsl: number[], highHsl: number[], fraction: number) {
const color: number[] = [];
for (let i = 0; i < 3; i++) {
// Calculate color based on the fraction.
color.push((highHsl[i] - lowHsl[i]) * fraction + lowHsl[i]);
}
return "hsl(" + color[0] + "," + color[1] + "%," + color[2] + "%)";
}
const mapStyle: google.maps.MapTypeStyle[] = [
{
featureType: "all",
elementType: "all",
stylers: [{ visibility: "off" }],
},
{
featureType: "landscape",
elementType: "geometry",
stylers: [{ visibility: "on" }, { color: "#fcfcfc" }],
},
{
featureType: "water",
elementType: "labels",
stylers: [{ visibility: "off" }],
},
{
featureType: "water",
elementType: "geometry",
stylers: [{ visibility: "on" }, { hue: "#5f94ff" }, { lightness: 60 }],
},
];
JavaScript
let map;
function initMap() {
map = new google.maps.Map(document.getElementById("map"), {
center: { lat: 20, lng: -160 },
zoom: 2,
styles: mapStyle,
});
map.data.setStyle(styleFeature);
// Get the earthquake data (JSONP format)
// This feed is a copy from the USGS feed, you can find the originals here:
// http://earthquake.usgs.gov/earthquakes/feed/v1.0/geojson.php
const script = document.createElement("script");
script.setAttribute(
"src",
"https://storage.googleapis.com/mapsdevsite/json/quakes.geo.json"
);
document.getElementsByTagName("head")[0].appendChild(script);
}
// Defines the callback function referenced in the jsonp file.
function eqfeed_callback(data) {
map.data.addGeoJson(data);
}
function styleFeature(feature) {
const low = [151, 83, 34]; // color of mag 1.0
const high = [5, 69, 54]; // color of mag 6.0 and above
const minMag = 1.0;
const maxMag = 6.0;
// fraction represents where the value sits between the min and max
const fraction =
(Math.min(feature.getProperty("mag"), maxMag) - minMag) / (maxMag - minMag);
const color = interpolateHsl(low, high, fraction);
return {
icon: {
path: google.maps.SymbolPath.CIRCLE,
strokeWeight: 0.5,
strokeColor: "#fff",
fillColor: color,
fillOpacity: 2 / feature.getProperty("mag"),
// while an exponent would technically be correct, quadratic looks nicer
scale: Math.pow(feature.getProperty("mag"), 2),
},
zIndex: Math.floor(feature.getProperty("mag")),
};
}
function interpolateHsl(lowHsl, highHsl, fraction) {
const color = [];
for (let i = 0; i < 3; i++) {
// Calculate color based on the fraction.
color.push((highHsl[i] - lowHsl[i]) * fraction + lowHsl[i]);
}
return "hsl(" + color[0] + "," + color[1] + "%," + color[2] + "%)";
}
const mapStyle = [
{
featureType: "all",
elementType: "all",
stylers: [{ visibility: "off" }],
},
{
featureType: "landscape",
elementType: "geometry",
stylers: [{ visibility: "on" }, { color: "#fcfcfc" }],
},
{
featureType: "water",
elementType: "labels",
stylers: [{ visibility: "off" }],
},
{
featureType: "water",
elementType: "geometry",
stylers: [{ visibility: "on" }, { hue: "#5f94ff" }, { lightness: 60 }],
},
];
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
<!DOCTYPE html>
<html>
<head>
<title>Advanced Data Layer: Earthquakes</title>
<script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
<link rel="stylesheet" type="text/css" href="./style.css" />
<script src="./index.js"></script>
</head>
<body>
<div id="map"></div>
<!-- Async script executes immediately and must be after any DOM elements used in callback. -->
<script
src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap&libraries=&v=weekly"
async
></script>
</body>
</html>
All
<!DOCTYPE html>
<html>
<head>
<title>Advanced Data Layer: Earthquakes</title>
<script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
<style type="text/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>
<script>
let map;
function initMap() {
map = new google.maps.Map(document.getElementById("map"), {
center: { lat: 20, lng: -160 },
zoom: 2,
styles: mapStyle,
});
map.data.setStyle(styleFeature);
// Get the earthquake data (JSONP format)
// This feed is a copy from the USGS feed, you can find the originals here:
// http://earthquake.usgs.gov/earthquakes/feed/v1.0/geojson.php
const script = document.createElement("script");
script.setAttribute(
"src",
"https://storage.googleapis.com/mapsdevsite/json/quakes.geo.json"
);
document.getElementsByTagName("head")[0].appendChild(script);
}
// Defines the callback function referenced in the jsonp file.
function eqfeed_callback(data) {
map.data.addGeoJson(data);
}
function styleFeature(feature) {
const low = [151, 83, 34]; // color of mag 1.0
const high = [5, 69, 54]; // color of mag 6.0 and above
const minMag = 1.0;
const maxMag = 6.0;
// fraction represents where the value sits between the min and max
const fraction =
(Math.min(feature.getProperty("mag"), maxMag) - minMag) /
(maxMag - minMag);
const color = interpolateHsl(low, high, fraction);
return {
icon: {
path: google.maps.SymbolPath.CIRCLE,
strokeWeight: 0.5,
strokeColor: "#fff",
fillColor: color,
fillOpacity: 2 / feature.getProperty("mag"),
// while an exponent would technically be correct, quadratic looks nicer
scale: Math.pow(feature.getProperty("mag"), 2),
},
zIndex: Math.floor(feature.getProperty("mag")),
};
}
function interpolateHsl(lowHsl, highHsl, fraction) {
const color = [];
for (let i = 0; i < 3; i++) {
// Calculate color based on the fraction.
color.push((highHsl[i] - lowHsl[i]) * fraction + lowHsl[i]);
}
return "hsl(" + color[0] + "," + color[1] + "%," + color[2] + "%)";
}
const mapStyle = [
{
featureType: "all",
elementType: "all",
stylers: [{ visibility: "off" }],
},
{
featureType: "landscape",
elementType: "geometry",
stylers: [{ visibility: "on" }, { color: "#fcfcfc" }],
},
{
featureType: "water",
elementType: "labels",
stylers: [{ visibility: "off" }],
},
{
featureType: "water",
elementType: "geometry",
stylers: [
{ visibility: "on" },
{ hue: "#5f94ff" },
{ lightness: 60 },
],
},
];
</script>
</head>
<body>
<div id="map"></div>
<!-- Async script executes immediately and must be after any DOM elements used in callback. -->
<script
src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap&libraries=&v=weekly"
async
></script>
</body>
</html>
let map;
function initMap() {
map = new google.maps.Map(document.getElementById("map"), {
center: { lat: 20, lng: -160 },
zoom: 2,
styles: mapStyle,
});
map.data.setStyle(styleFeature);
// Get the earthquake data (JSONP format)
// This feed is a copy from the USGS feed, you can find the originals here:
// http://earthquake.usgs.gov/earthquakes/feed/v1.0/geojson.php
const script = document.createElement("script");
script.setAttribute(
"src",
"https://storage.googleapis.com/mapsdevsite/json/quakes.geo.json"
);
document.getElementsByTagName("head")[0].appendChild(script);
}
// Defines the callback function referenced in the jsonp file.
function eqfeed_callback(data) {
map.data.addGeoJson(data);
}
function styleFeature(feature) {
const low = [151, 83, 34]; // color of mag 1.0
const high = [5, 69, 54]; // color of mag 6.0 and above
const minMag = 1.0;
const maxMag = 6.0;
// fraction represents where the value sits between the min and max
const fraction =
(Math.min(feature.getProperty("mag"), maxMag) - minMag) / (maxMag - minMag);
const color = interpolateHsl(low, high, fraction);
return {
icon: {
path: google.maps.SymbolPath.CIRCLE,
strokeWeight: 0.5,
strokeColor: "#fff",
fillColor: color,
fillOpacity: 2 / feature.getProperty("mag"),
// while an exponent would technically be correct, quadratic looks nicer
scale: Math.pow(feature.getProperty("mag"), 2),
},
zIndex: Math.floor(feature.getProperty("mag")),
};
}
function interpolateHsl(lowHsl, highHsl, fraction) {
const color = [];
for (let i = 0; i < 3; i++) {
// Calculate color based on the fraction.
color.push((highHsl[i] - lowHsl[i]) * fraction + lowHsl[i]);
}
return "hsl(" + color[0] + "," + color[1] + "%," + color[2] + "%)";
}
const mapStyle = [
{
featureType: "all",
elementType: "all",
stylers: [{ visibility: "off" }],
},
{
featureType: "landscape",
elementType: "geometry",
stylers: [{ visibility: "on" }, { color: "#fcfcfc" }],
},
{
featureType: "water",
elementType: "labels",
stylers: [{ visibility: "off" }],
},
{
featureType: "water",
elementType: "geometry",
stylers: [{ visibility: "on" }, { hue: "#5f94ff" }, { lightness: 60 }],
},
];
/* 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;
}
<!DOCTYPE html>
<html>
<head>
<title>Advanced Data Layer: Earthquakes</title>
<script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
<!-- jsFiddle will insert css and js -->
</head>
<body>
<div id="map"></div>
<!-- Async script executes immediately and must be after any DOM elements used in callback. -->
<script
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