simplify

Takes a GeoJSON object and returns a simplified version. Internally uses simplify-js to perform simplification using the Ramer-Douglas-Peucker algorithm.
获取GeoJSON对象并返回简化版本。内部使用 simplify-js (opens new window) 使用 Ramer–Douglas–Peucker (opens new window) 算法执行简化。

参数

参数	类型	描述
geojson	GeoJSON	object to be simplified
options	Object	可选参数：见下文

options选项

属性	类型	默认值	描述
tolerance	number	1	simplification tolerance
highQuality	boolean	false	whether or not to spend more time to create a higher-quality simplification with a different algorithm
mutate	boolean	false	允许修改GeoJSON输入（如果为真，性能将显著提高）

返回

GeoJSON - a simplified GeoJSON

示例

var geojson = turf.polygon([[
  [-70.603637, -33.399918], // 注意：polygon首尾坐标要一致
  [-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);