@turf/buffer

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.

Parameters

• 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.endCapStyle string can be round, flat or square (optional, default "round")
  • options.steps number number of steps (optional, default 8)

Examples

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

//addToMap
var addToMap = [point, buffered]

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

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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.

Installation

Install this module individually:

$ npm install @turf/buffer

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

$ npm install @turf/turf