---
title: "Scale point radius based on the zoom level (point helper) | JavaScript maps SDK"
description: "Scale point layer radius by map zoom level."
---
# 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](../../assets/earthquakes.geojson).
### NPM module setup
```bash
npm install --save @maptiler/sdk
```
#### main.js
```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
```html
Scale point radius based on the zoom level (point helper) | NPM example
```
#### style.css
```css
body {margin: 0; padding: 0;}
#map {position: absolute; top: 0; bottom: 0; width: 100%;}
```
### Basic JavaScript setup
```html
Point helper
```
## Related examples
### [Point layer cluster (point helper)](https://docs.maptiler.com/sdk-js/examples/helper-point-cluster/)
Examples
Add clustered point layer using MapTiler point helper.
### [Heatmap layer (heatmap helper)](https://docs.maptiler.com/sdk-js/examples/helper-heatmap-minimal/)
Examples
Quickly add a heatmap layer using the heatmap helper.
### [Point layer (point helper)](https://docs.maptiler.com/sdk-js/examples/helper-point-minimal/)
Examples
Add minimal point layer using MapTiler point helper.
### [Point layer scaled radius by property (point helper)](https://docs.maptiler.com/sdk-js/examples/helper-point-ramped-property/)
Examples
Scale point layer radius and color by property.