turf-circle

turf-circle

turf circle module

turf.circle(center, radius, steps, units)

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

Parameters

parameter	type	description
center	Feature.<Point>	center point
radius	Number	radius of the circle
steps	Number	number of steps
units	String	miles, kilometers, degrees, or radians

Example

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

Installation

Requires nodejs.

$ npm install turf-circle

Tests

$ npm test