Created
July 30, 2018 18:11
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#!/usr/bin/env node | |
var fs = require('fs'); | |
var turf = require('@turf/turf'); | |
function readFile(path) { | |
console.log("Reading:", path); | |
var data = fs.readFileSync(path); | |
return JSON.parse(data); | |
} | |
function writeFile(data, path) { | |
console.log("Writing:", path); | |
fs.writeFileSync(path, JSON.stringify(data, null, 2)); | |
} | |
function writeOutput(points, hull, path) { | |
if (!hull) { | |
console.log("Cannot write", path, "because hull is undefined"); | |
return; | |
} | |
var resultFeatures = points.features.concat(hull); | |
var result = { | |
"type": "FeatureCollection", | |
"features": resultFeatures | |
}; | |
writeFile(result, path); | |
} | |
var points = readFile('./points_dc.geojson'); | |
var convexHull = turf.convex(points); | |
writeOutput(points, convexHull, './convex.geojson'); | |
var concaveHull = turf.concave(points); | |
writeOutput(points, concaveHull, './concave_default.geojson'); | |
var options = {'maxEdge': 1, 'units': 'miles'}; | |
var concaveHull_1 = turf.concave(points, options); | |
writeOutput(points, concaveHull_1, './concave_1.geojson'); | |
options = {'maxEdge': 0.1, 'units': 'miles'}; | |
var concaveHull_point1 = turf.concave(points); | |
writeOutput(points, concaveHull_point1, './concave_0.1.geojson'); |
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