# @turf/unkink-polygon

# unkinkPolygon

Takes a kinked polygon and returns a feature collection of polygons that have no kinks.
Uses [simplepolygon](https://github.com/mclaeysb/simplepolygon) internally.

**Parameters**

-   `geojson` **([FeatureCollection](http://geojson.org/geojson-spec.html#feature-collection-objects) \| [Feature](http://geojson.org/geojson-spec.html#feature-objects)<([Polygon](http://geojson.org/geojson-spec.html#polygon) \| [MultiPolygon](http://geojson.org/geojson-spec.html#multipolygon))>)** GeoJSON Polygon or MultiPolygon

**Examples**

```javascript
var poly = turf.polygon([[[0, 0], [2, 0], [0, 2], [2, 2], [0, 0]]]);

var result = turf.unkinkPolygon(poly);

//addToMap
var addToMap = [poly, result]
```

Returns **[FeatureCollection](http://geojson.org/geojson-spec.html#feature-collection-objects)<[Polygon](http://geojson.org/geojson-spec.html#polygon)>** Unkinked polygons

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---

This module is part of the [Turfjs project](http://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 module individually:

```sh
$ npm install @turf/unkink-polygon
```

Or install the Turf module that includes it as a function:

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