turf-circle

turf-circle

circle

Takes a Point and calculates the circle polygon given a radius in degrees, radians, miles, or kilometers; and steps for precision.

Parameters

• center Feature<Point> center point
• radius number radius of the circle
• steps number number of steps
• units [String] miles, kilometers, degrees, or radians (optional, default kilometers)

Examples

var center = {
  "type": "Feature",
  "properties": {
    "marker-color": "#0f0"
  },
  "geometry": {
    "type": "Point",
    "coordinates": [-75.343, 39.984]
  }
};
var radius = 5;
var steps = 10;
var units = 'kilometers';

var circle = turf.circle(center, radius, steps, units);

var result = {
  "type": "FeatureCollection",
  "features": [center, circle]
};

//=result

Returns Feature<Polygon> circle polygon

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-circle

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

$ npm install turf