Created
December 2, 2014 19:15
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Negative buffer with turf.js
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<!DOCTYPE html> | |
<html> | |
<head> | |
<meta charset=utf-8 /> | |
<title>turf-buffer</title> | |
<meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' /> | |
<script src='https://rawgit.com/Turfjs/turf/master/turf.min.js'></script> | |
<script src='https://api.tiles.mapbox.com/mapbox.js/v2.0.1/mapbox.js'></script> | |
<link href='https://api.tiles.mapbox.com/mapbox.js/v2.0.1/mapbox.css' rel='stylesheet' /> | |
<style> | |
body { margin:0; padding:0; } | |
#map { position:absolute; top:0; bottom:0; width:100%; } | |
</style> | |
</head> | |
<body> | |
<div id='map'></div> | |
<script> | |
L.mapbox.accessToken = 'pk.eyJ1IjoiZmFyYWRheTIiLCJhIjoiTUVHbDl5OCJ9.buFaqIdaIM3iXr1BOYKpsQ'; | |
var polygon = turf.polygon([ | |
[ | |
[-121.5847,40.1002],[-121.5080,40.1002],[-121.4368,40.1495],[-121.4040,40.1495],[-121.3656,40.0838],[-121.4204,40.0181],[-121.4094,39.8702],[-121.0753,39.5963],[-121.1575,39.5197],[-121.3054,39.5197],[-121.3328,39.4265],[-121.4040,39.3389],[-121.6121,39.3170],[-121.6230,39.2951],[-121.9078,39.3061],[-121.8914,39.3827],[-121.8585,39.5361],[-121.9955,39.5361],[-121.9900,39.6401],[-121.9681,39.6511],[-121.9955,39.6675],[-121.9407,39.6949],[-121.9462,39.7333],[-122.0448,39.7990],[-122.0667,39.8428],[-122.0448,39.8811],[-121.7764,39.8866],[-121.7052,39.9852],[-121.6449,39.9852] | |
] | |
], { | |
"fill": "#e2e3e3", | |
"stroke": "#333", | |
"stroke-width": 5 | |
}); | |
var map = L.mapbox.map('map', 'faraday2.206936a8') | |
.setView([39.66914219401813, -121.44561767578125], 9); | |
var buffer = turf.buffer(polygon, -8, "miles"); | |
buffer.features[0].properties = { | |
"fill": "#0000ff", | |
"stroke": "#0000ff", | |
"stroke-width": 5, | |
"description": "8 miles inward" | |
} | |
L.mapbox.featureLayer().setGeoJSON(polygon).addTo(map); | |
L.mapbox.featureLayer().setGeoJSON(buffer).addTo(map); | |
</script> | |
</body> | |
</html> |
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