@turf/random

@turf/random

randomPosition

Returns a random position within a box.

Parameters

• bbox Array<number> a bounding box inside of which positions are placed. (optional, default [-180,-90,180,90])

Examples

var position = turf.randomPosition([-180, -90, 180, 90])
// => position

• Throws Error if bbox is invalid

Returns Array<number> Position [longitude, latitude]

randomPoint

Returns a random point.

Parameters

• count number how many geometries will be generated (optional, default 1)

• options Object Optional parameters (optional, default {})

  • options.bbox Array<number> a bounding box inside of which geometries are placed. (optional, default [-180,-90,180,90])

Examples

var points = turf.randomPoint(25, {bbox: [-180, -90, 180, 90]})
// => points

• Throws Error if bbox is invalid

Returns FeatureCollection<Point> GeoJSON FeatureCollection of points

randomPolygon

Returns a random polygon.

Parameters

• count number how many geometries will be generated (optional, default 1)

• options Object Optional parameters (optional, default {})

  • options.bbox Array<number> a bounding box inside of which geometries are placed. (optional, default [-180,-90,180,90])
  • options.num_vertices number is how many coordinates each LineString will contain. (optional, default 10)
  • options.max_radial_length number is the maximum number of decimal degrees latitude or longitude that a vertex can reach out of the center of the Polygon. (optional, default 10)

Examples

var polygons = turf.randomPolygon(25, {bbox: [-180, -90, 180, 90]})
// => polygons

• Throws Error if bbox is invalid

Returns FeatureCollection<Polygon> GeoJSON FeatureCollection of polygons

randomLineString

Returns a random linestring.

Parameters

• count number how many geometries will be generated (optional, default 1)

• options Object Optional parameters (optional, default {})

  • options.bbox Array<number> a bounding box inside of which geometries are placed. (optional, default [-180,-90,180,90])
  • options.num_vertices number is how many coordinates each LineString will contain. (optional, default 10)
  • options.max_length number is the maximum number of decimal degrees that a vertex can be from its predecessor (optional, default 0.0001)
  • options.max_rotation number is the maximum number of radians that a line segment can turn from the previous segment. (optional, default Math.PI/8)

Examples

var lineStrings = turf.randomLineString(25, {bbox: [-180, -90, 180, 90]})
// => lineStrings

• Throws Error if bbox is invalid

Returns FeatureCollection<LineString> GeoJSON FeatureCollection of linestrings

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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 single module individually:

$ npm install @turf/random

Or install the all-encompassing @turf/turf module that includes all modules as functions:

$ npm install @turf/turf