# Data Layer: Polygon

This example uses the Data layer to create a polygon with two internal holes. If you don't use the data layer to create an inner hole, you must define a path wound in the opposite direction to the outer path as shown in this alternative.

Read the documentation.

```// This example uses the Google Maps JavaScript API's Data layer
// to create a rectangular polygon with 2 holes in it.

function initMap() {
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 6,
center: {lat: -33.872, lng: 151.252},
});

// Define the LatLng coordinates for the outer path.
var outerCoords = [
{lat: -32.364, lng: 153.207}, // north west
{lat: -35.364, lng: 153.207}, // south west
{lat: -35.364, lng: 158.207}, // south east
{lat: -32.364, lng: 158.207}  // north east
];

// Define the LatLng coordinates for an inner path.
var innerCoords1 = [
{lat: -33.364, lng: 154.207},
{lat: -34.364, lng: 154.207},
{lat: -34.364, lng: 155.207},
{lat: -33.364, lng: 155.207}
];

// Define the LatLng coordinates for another inner path.
var innerCoords2 = [
{lat: -33.364, lng: 156.207},
{lat: -34.364, lng: 156.207},
{lat: -34.364, lng: 157.207},
{lat: -33.364, lng: 157.207}
];

map.data.add({geometry: new google.maps.Data.Polygon([outerCoords,
innerCoords1,
innerCoords2])})
}```
`<div id="map"></div>`
```/* 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;
}```
```<!-- Replace the value of the key parameter with your own API key. -->
<script async defer
src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk&callback=initMap">
</script>```

## Try it yourself

You can experiment with this code in JSFiddle by clicking the `<>` icon in the top-right corner of the code window.

```<!DOCTYPE html>
<html>
<head>
<title>Data Layer: Polygon</title>
<meta name="viewport" content="initial-scale=1.0">
<meta charset="utf-8">
<style>
/* 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>
</head>
<body>
<div id="map"></div>
<script>

// This example uses the Google Maps JavaScript API's Data layer
// to create a rectangular polygon with 2 holes in it.

function initMap() {
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 6,
center: {lat: -33.872, lng: 151.252},
});

// Define the LatLng coordinates for the outer path.
var outerCoords = [
{lat: -32.364, lng: 153.207}, // north west
{lat: -35.364, lng: 153.207}, // south west
{lat: -35.364, lng: 158.207}, // south east
{lat: -32.364, lng: 158.207}  // north east
];

// Define the LatLng coordinates for an inner path.
var innerCoords1 = [
{lat: -33.364, lng: 154.207},
{lat: -34.364, lng: 154.207},
{lat: -34.364, lng: 155.207},
{lat: -33.364, lng: 155.207}
];

// Define the LatLng coordinates for another inner path.
var innerCoords2 = [
{lat: -33.364, lng: 156.207},
{lat: -34.364, lng: 156.207},
{lat: -34.364, lng: 157.207},
{lat: -33.364, lng: 157.207}
];

map.data.add({geometry: new google.maps.Data.Polygon([outerCoords,
innerCoords1,
innerCoords2])})
}
</script>
<script async defer
src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap">
</script>
</body>
</html>
```

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