Scale point radius based on the zoom level (point helper)

This example shows the method of adjusting the size of a point layer based on the zoom level of the map using the point layer helper. By utilizing this technique, you can easily scale the radius of the point layer by the zoom level. To replicate this example, download the earthquake sample data.


npm install --save @maptiler/sdk

main.js

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

config.apiKey = 'YOUR_MAPTILER_API_KEY_HERE';
const map = new Map({
    container: 'map',
    zoom: 6.30,
    center: [-119.602, 35.732],
    style: MapStyle.DATAVIZ.LIGHT
});

map.on('load', async function () {
  await helpers.addPoint(map, {
    data: 'YOUR_MAPTILER_DATASET_ID_HERE',
    pointRadius: [
      {zoom: 2, value: 1 },
      {zoom: 8, value: 6 },
      {zoom: 12, value: 10 },
    ],
    pointColor: "red",
  });
});

index.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="robots" content="noindex">
  <title>Scale point radius based on the zoom level (point helper) | 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>Point helper</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',
        zoom: 6.30,
        center: [-119.602, 35.732],
        style: maptilersdk.MapStyle.DATAVIZ.LIGHT
    });

    map.on('load', async function () {
      await maptilersdk.helpers.addPoint(map, {
        data: 'YOUR_MAPTILER_DATASET_ID_HERE',
        pointRadius: [
          {zoom: 2, value: 1 },
          {zoom: 8, value: 6 },
          {zoom: 12, value: 10 },
        ],
        pointColor: "red",
      });
    });

</script>
</body>
</html>