simplify

描述

¥Description

获取一个 GeoJSON 对象并返回其简化版本。内部使用 simplify-js 的二维版本，通过 Ramer-Douglas-Peucker 算法进行简化。

¥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.

参数

¥Parameters

名称	类型	描述
geojson	GeoJSON	要简化的对象
options?	对象	可选参数（默认 {}）
options.tolerance?	number	简化容差（默认 1）
options.highQuality?	boolean	是否花费更多时间使用其他算法创建更高质量的简化（默认 false）
options.mutate?	boolean	允许 GeoJSON 输入发生修改（如果为 true，则性能显著提升）（默认为 false）

返回

¥Returns

GeoJSON 简化的 GeoJSON

¥GeoJSON a simplified GeoJSON

示例

¥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);

安装

¥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(...);