@turf/sample

sample

Takes a FeatureCollection and returns a FeatureCollection with given number of features at random.

Parameters

• fc FeatureCollection<T>
• num number number of features to select
• featurecollection FeatureCollection set of input features

Examples

var points = turf.randomPoint(100, {bbox: [-80, 30, -60, 60]});

var sample = turf.sample(points, 5);

//addToMap
var addToMap = [points, sample]
turf.featureEach(sample, function (currentFeature) {
  currentFeature.properties['marker-size'] = 'large';
  currentFeature.properties['marker-color'] = '#000';
});

Returns FeatureCollection a FeatureCollection with n 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.

Installation

Install this single module individually:

$ npm install @turf/sample

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

$ npm install @turf/turf