turf convex module

Usage no npm install needed!

<script type="module">
  import turfConvex from 'https://cdn.skypack.dev/@turf/convex';




Takes a Feature or a FeatureCollection and returns a convex hull Polygon.

Internally this uses the convex-hull module that implements a monotone chain hull.


  • geojson GeoJSON input Feature or FeatureCollection
  • options Object Optional parameters (optional, default {})
    • options.concavity number 1 - thin shape. Infinity - convex hull. (optional, default Infinity)
    • options.properties Object Translate Properties to Feature (optional, default {})


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);

var addToMap = [points, hull]

Returns Feature<Polygon> a convex hull

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.


Install this module individually:

$ npm install @turf/convex

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

$ npm install @turf/turf