---
title: "Pressure isolines layer | Weather plus"
description: "Weather module pressure isolines API reference."
---

> For AI agents: a documentation index is available at [/llms.txt](https://docs.maptiler.com/llms.txt). Markdown versions of all pages are available by appending .md to any URL.

# Pressure isolines layer

The `PressureIsolineLayer` shows the atmospheric pressure isolines in millibar (**mbar**) or hectopascal (**hPa**). Forecast for air pressure at mean sea level.

![Pressure isolines layer](./isoline.webp)

**Example**

```js
import { PressureIsolineLayer } from "@maptiler/weather-plus";

  // After creating a Map instance like in the `Getting Started`
  const layer = new PressureIsolineLayer(); // using default settings
```

## API reference

[Class PressureIsolineLayer](https://docs.maptiler.com/sdk-js/modules/weather/api-reference/classes/PressureIsolineLayer/)

## Related examples

-   [Weather plus pressure isolines layer](https://docs.maptiler.com/sdk-js/examples/weather-plus-pressure-isolines/)