turf buffer module

Usage no npm install needed!

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




Calculates a buffer for input features for a given radius. Units supported are miles, kilometers, and degrees.

When using a negative radius, the resulting geometry may be invalid if it's too small compared to the radius magnitude. If the input is a FeatureCollection, only valid members will be returned in the output FeatureCollection - i.e., the output collection may have fewer members than the input, or even be empty.


  • geojson (FeatureCollection | Geometry | Feature<any>) input to be buffered
  • radius number distance to draw the buffer (negative values are allowed)
  • options Object Optional parameters (optional, default {})
    • options.units string any of the options supported by turf units (optional, default "kilometers")
    • options.steps number number of steps (optional, default 8)


var point = turf.point([-90.548630, 14.616599]);
var buffered = turf.buffer(point, 500, {units: 'miles'});

var addToMap = [point, buffered]

Returns (FeatureCollection | Feature<(Polygon | MultiPolygon)> | undefined) buffered features

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/buffer

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

$ npm install @turf/turf