simplify

Description

Takes a GeoJSON object and returns a simplified version. Internally uses the 2d version of simplify-js to perform simplification using the Ramer-Douglas-Peucker algorithm.

Parameters

Name	Type	Description
geojson	GeoJSON	object to be simplified
options?	Object	Optional parameters (default {})
options.tolerance?	number	simplification tolerance (default 1)
options.highQuality?	boolean	whether or not to spend more time to create a higher-quality simplification with a different algorithm (default false)
options.mutate?	boolean	allows GeoJSON input to be mutated (significant performance increase if true) (default false)

Returns

GeoJSON a simplified GeoJSON

Examples

var geojson = turf.polygon([
  [
    [-70.603637, -33.399918],
    [-70.614624, -33.395332],
    [-70.639343, -33.392466],
    [-70.659942, -33.394759],
    [-70.683975, -33.404504],
    [-70.697021, -33.419406],
    [-70.701141, -33.434306],
    [-70.700454, -33.446339],
    [-70.694274, -33.458369],
    [-70.682601, -33.465816],
    [-70.668869, -33.472117],
    [-70.646209, -33.473835],
    [-70.624923, -33.472117],
    [-70.609817, -33.468107],
    [-70.595397, -33.458369],
    [-70.587158, -33.442901],
    [-70.587158, -33.426283],
    [-70.590591, -33.414248],
    [-70.594711, -33.406224],
    [-70.603637, -33.399918],
  ],
]);
var options = { tolerance: 0.01, highQuality: false };
var simplified = turf.simplify(geojson, options);

Installation

$ npm install @turf/simplify

import { simplify } from "@turf/simplify";
const result = simplify(...);

$ npm install @turf/turf

import * as turf from "@turf/turf";
const result = turf.simplify(...);