@turf/convex

convex

Takes a [Feature][1] or a [FeatureCollection][2] and returns a convex hull [Polygon][3].

Internally this uses
the [convex-hull][4] module that implements a
[monotone chain hull][5].

$3

* geojson [GeoJSON][6] input Feature or FeatureCollection
* options [Object][7] Optional parameters (optional, default {})

* options.concavity [number][8] 1 - thin shape. Infinity - convex hull. (optional, default Infinity)
* options.properties [Object][7] Translate Properties to Feature (optional, default {})

$3

``javascript
var points = turf.featureCollection([
turf.point([10.195312, 43.755225]),
turf.point([10.404052, 43.8424511]),
turf.point([10.579833, 43.659924]),
turf.point([10.360107, 43.516688]),
turf.point([10.14038, 43.588348]),
turf.point([10.195312, 43.755225])
]);

var hull = turf.convex(points);

//addToMap
var addToMap = [points, hull]
`

Returns [Feature][1]<[Polygon][3]> a convex hull

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

[2]: https://tools.ietf.org/html/rfc7946#section-3.3

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

[4]: https://github.com/mikolalysenko/convex-hull

[5]: http://en.wikibooks.org/wiki/Algorithm_Implementation/Geometry/Convex_hull/Monotone_chain

[6]: https://tools.ietf.org/html/rfc7946#section-3

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

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

---

This module is part of the Turfjs project, an open source module collection dedicated to geographic algorithms. It is maintained in the Turfjs/turf repository, where you can create PRs and issues.

$3

Install this single module individually:

`sh
$ npm install @turf/convex
`

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

`sh
$ npm install @turf/turf
``