Add a pattern to a polygon

Use the fill-pattern feature to draw a polygon by employing a repeating image pattern. This technique allows for the creation of visually appealing shapes by using a repeated image as a fill. To implement this, refer to the layer ⇾ fill ⇾ fill-pattern section in the GL Style Specification.


npm install --save @maptiler/sdk

main.js

import { Map, MapStyle, config } from '@maptiler/sdk';
import '@maptiler/sdk/dist/maptiler-sdk.css';

config.apiKey = 'YOUR_MAPTILER_API_KEY_HERE';
const map = new Map({
    container: 'map',
    style: MapStyle.STREETS,
    center: [0, 0],
    zoom: 1
});

map.on('load', async function () {
    // Add GeoJSON data
    map.addSource('source', {
        'type': 'geojson',
        'data': {
            'type': 'Feature',
            'properties': {},
            'geometry': {
                'type': 'Polygon',
                'coordinates': [
                    [
                        [-30, -25],
                        [-30, 35],
                        [30, 35],
                        [30, -25],
                        [-30, -25]
                    ]
                ]
            }
        }
    });

    // Load an image to use as the pattern
    const image = await map.loadImage(
        'https://upload.wikimedia.org/wikipedia/commons/thumb/6/60/Cat_silhouette.svg/64px-Cat_silhouette.svg.png');

    // Declare the image
    map.addImage('pattern', image.data);

    // Use it
    map.addLayer({
        'id': 'pattern-layer',
        'type': 'fill',
        'source': 'source',
        'paint': {
            'fill-pattern': 'pattern'
        }
    });
});

index.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="robots" content="noindex">
  <title>Add a pattern to a polygon | NPM example</title>
  <link rel="stylesheet" href="./style.css">
</head>
<body>
  <div id="map"></div>
  <script type="module" src="./main.js"></script>
</body>
</html>

style.css

body {margin: 0; padding: 0;}
#map {position: absolute; top: 0; bottom: 0; width: 100%;}

<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Add a pattern to a polygon</title>
<script src="https://cdn.maptiler.com/maptiler-sdk-js/v4.1.0/maptiler-sdk.umd.min.js"></script>
<link href="https://cdn.maptiler.com/maptiler-sdk-js/v4.1.0/maptiler-sdk.css" rel="stylesheet" />
<style>
  body {margin: 0; padding: 0;}
  #map {position: absolute; top: 0; bottom: 0; width: 100%;}
</style>
</head>
<body>
<div id="map"></div>

<script>
    maptilersdk.config.apiKey = 'YOUR_MAPTILER_API_KEY_HERE';
    const map = new maptilersdk.Map({
        container: 'map',
        style: maptilersdk.MapStyle.STREETS,
        center: [0, 0],
        zoom: 1
    });

    map.on('load', async function () {
        // Add GeoJSON data
        map.addSource('source', {
            'type': 'geojson',
            'data': {
                'type': 'Feature',
                'properties': {},
                'geometry': {
                    'type': 'Polygon',
                    'coordinates': [
                        [
                            [-30, -25],
                            [-30, 35],
                            [30, 35],
                            [30, -25],
                            [-30, -25]
                        ]
                    ]
                }
            }
        });

        // Load an image to use as the pattern
        const image = await map.loadImage(
            'https://upload.wikimedia.org/wikipedia/commons/thumb/6/60/Cat_silhouette.svg/64px-Cat_silhouette.svg.png');

        // Declare the image
        map.addImage('pattern', image.data);

        // Use it
        map.addLayer({
            'id': 'pattern-layer',
            'type': 'fill',
            'source': 'source',
            'paint': {
                'fill-pattern': 'pattern'
            }
        });
    });
</script>
</body>
</html>