Turf Concave Hull

by Alex Azuero

HTML

<script src="https://api.mapbox.com/mapbox.js/v2.4.0/mapbox.js"></script>
<link rel="stylesheet" href="https://api.mapbox.com/mapbox.js/v2.4.0/mapbox.css">
<script src='https://api.mapbox.com/mapbox.js/plugins/turf/v2.0.2/turf.min.js'></script>
<div id='map'></div>

CSS

body { margin:0; padding:0; }
#map { position:absolute; top:0; bottom:0; width:100%; }

JavaScript

L.mapbox.accessToken = 'pk.eyJ1IjoiZmFyYWRheTIiLCJhIjoiTUVHbDl5OCJ9.buFaqIdaIM3iXr1BOYKpsQ';
var map = L.mapbox.map('map', 'examples.map-zr0njcqy');

map.featureLayer.on('ready', function() {
    var hull = turf.buffer(map.featureLayer.getGeoJSON(), 5, 'kilometers');
    L.mapbox.featureLayer(hull).addTo(map);
});