# @turf/truncate

# truncate

Takes a GeoJSON Feature or FeatureCollection and truncates the precision of the geometry.

**Parameters**

-   `geojson` **([FeatureCollection](http://geojson.org/geojson-spec.html#feature-collection-objects) \| [Feature](http://geojson.org/geojson-spec.html#feature-objects)<any>)** any GeoJSON Feature, FeatureCollection, Geometry or GeometryCollection.
-   `precision` **\[[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)]** coordinate decimal precision (optional, default `6`)
-   `coordinates` **\[[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)]** maximum number of coordinates (primarly used to remove z coordinates) (optional, default `3`)
-   `mutate` **\[[boolean](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Boolean)]** allows GeoJSON input to be mutated (significant performance increase if true) (optional, default `false`)

**Examples**

```javascript
var point = turf.point([
    70.46923055566859,
    58.11088890802906,
    1508
]);

var truncated = turf.truncate(point);

//addToMap
var addToMap = [truncated];
```

Returns **([FeatureCollection](http://geojson.org/geojson-spec.html#feature-collection-objects) \| [Feature](http://geojson.org/geojson-spec.html#feature-objects)<any>)** layer with truncated geometry

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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/truncate
```

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

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