Craig Goldstone craiggoldstone
rclark
/ lines2polysNoder.js
Created
August 6, 2013 21:34
JSTS to create polygons from a network of arbitrary, or "spaghetti" lines. This uses jsts.noding to "clean" or "planarize" the line network, which is crazy fast compared to the "Union" alternative here: https://gist.github.com/rclark/6123614
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| var jsts = require("jsts"), | |
| u = require("underscore"), | |
| fs = require("fs"); | |
| fs.readFile("/Users/ryan/Desktop/hv-lines.geojson", function (err, data) { | |
| var geojson = JSON.parse(data), | |
| writer = new jsts.io.GeoJSONWriter(), | |
| polygonizer = new jsts.operation.polygonize.Polygonizer(), | |
| noder = new jsts.noding.MCIndexNoder(), | |
| intersector = new jsts.algorithm.RobustLineIntersector(), |