# @turf/ellipse

> Takes a Point and calculates the ellipse polygon given two semi-axes expressed in variable units and steps for precision.

Latest version **7.4.0** (published 2026-08-03) · MIT license · 0 weekly downloads

## Install

```sh
npm install @turf/ellipse
pnpm add @turf/ellipse
yarn add @turf/ellipse
bun add @turf/ellipse
```

## Health

**Score 80/100 (A)** — status: active.

Positive: has types; esm support; no vulnerabilities; has provenance; recently updated; high maintenance score; high quality score; popular repo.

Warnings: low downloads.

## Facts

| | |
|---|---|
| Version | 7.4.0 |
| Published | 2026-08-03 |
| First published | 2017-11-21 |
| Weekly downloads | 0 |
| License | MIT |
| TypeScript types | bundled |
| Module format | ESM + CommonJS |
| Dependencies | 7 |
| Unpacked size | 30.2 KB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| Provenance | attested (GitHub Actions) |
| GitHub stars | 10491 |
| Author | Turf Authors |
| Maintainers | rowanwins, tmcw, morganherlocker, tcql, mdfedderly, twelch, jamesmilneruk, morgan.herlocker |
| Keywords | turf, ellipse |

## Links

- npm: https://www.npmjs.com/package/@turf/ellipse
- Repository: https://github.com/Turfjs/turf
- Issues: https://github.com/Turfjs/turf/issues
- Funding: https://opencollective.com/turf
- npm.io page: https://npm.io/package/@turf/ellipse

## Dependencies (7)

- [tslib](https://npm.io/package/tslib.md) ^2.8.1
- [@turf/helpers](https://npm.io/package/@turf/helpers.md) 7.4.0
- [@turf/distance](https://npm.io/package/@turf/distance.md) 7.4.0
- [@types/geojson](https://npm.io/package/@types/geojson.md) ^7946.0.10
- [@turf/invariant](https://npm.io/package/@turf/invariant.md) 7.4.0
- [@turf/destination](https://npm.io/package/@turf/destination.md) 7.4.0
- [@turf/transform-rotate](https://npm.io/package/@turf/transform-rotate.md) 7.4.0

## Recent versions

- 7.4.0 (latest) — 2026-08-03
- 7.1.0-alpha.70 (prerelease) — 2024-08-09
- 7.3.5 — 2026-04-19
- 7.3.4 — 2026-02-08
- 7.3.3 — 2026-01-28
- 7.3.2 — 2026-01-14
- 7.3.1 — 2025-11-27
- 7.3.0 — 2025-11-17
- 7.2.0 — 2024-12-29
- 7.1.0 — 2024-08-09
- 7.1.0-alpha.7 — 2024-06-25
- 7.0.0 — 2024-06-07
- 7.0.0-alpha.116 — 2024-05-07
- 7.0.0-alpha.115 — 2024-04-23
- 7.0.0-alpha.114 — 2024-03-11
- … 18 more at https://npm.io/package/@turf/ellipse/versions

## README

# @turf/ellipse

<!-- Generated by documentation.js. Update this documentation by updating the source code. -->

## ellipse

Takes a [Point][1] and calculates the ellipse polygon given two semi-axes expressed in variable units and steps for precision.

### Parameters

*   `center` **[Coord][2]** center point
*   `xSemiAxis` **[number][3]** semi (major) axis of the ellipse along the x-axis
*   `ySemiAxis` **[number][3]** semi (minor) axis of the ellipse along the y-axis
*   `options` **[Object][4]** Optional parameters (optional, default `{}`)

    *   `options.angle` **[number][3]** angle of rotation in decimal degrees, positive clockwise (optional, default `0`)
    *   `options.pivot` **[Coord][2]** point around which any rotation will be performed (optional, default `center`)
    *   `options.steps` **[number][3]** number of steps (optional, default `64`)
    *   `options.units` **Units** unit of measurement for axes. Supports all valid Turf [Units][5] (optional, default `'kilometers'`)
    *   `options.properties` **[Object][4]** properties (optional, default `{}`)

### Examples

```javascript
var center = [-75, 40];
var xSemiAxis = 5;
var ySemiAxis = 2;
var ellipse = turf.ellipse(center, xSemiAxis, ySemiAxis);

//addToMap
var addToMap = [turf.point(center), ellipse]
```

Returns **[Feature][6]<[Polygon][7]>** ellipse polygon

[1]: https://tools.ietf.org/html/rfc7946#section-3.1.2

[2]: https://tools.ietf.org/html/rfc7946#section-3.1.1

[3]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Number

[4]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object

[5]: https://turfjs.org/docs/api/types/Units

[6]: https://tools.ietf.org/html/rfc7946#section-3.2

[7]: https://tools.ietf.org/html/rfc7946#section-3.1.6

<!-- This file is automatically generated. Please don't edit it directly. If you find an error, edit the source file of the module in question (likely index.js or index.ts), and re-run "yarn docs" from the root of the turf project. -->

---

This module is part of the [Turfjs project](https://turfjs.org/), an open source module collection dedicated to geographic algorithms. It is maintained in the [Turfjs/turf](https://github.com/Turfjs/turf) repository, where you can create PRs and issues.

### Installation

Install this single module individually:

```sh
$ npm install @turf/ellipse
```

Or install the all-encompassing @turf/turf module that includes all modules as functions:

```sh
$ npm install @turf/turf
```

---
_Source: https://npm.io/package/@turf/ellipse · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._