simplify

simplify是一个Turf中的转换函数，用于减少GeoJSON要素中的顶点数量。

参数

• geojson (Feature<\LineString>|Feature<\MultiLineString>|Feature<\Polygon>|Feature<\MultiPolygon>|FeatureCollection<\LineString>|FeatureCollection<\MultiLineString>|FeatureCollection<\Polygon>|FeatureCollection<\MultiPolygon>)：输入的GeoJSON要素。必填参数。
• options (Object?)：可选的配置参数对象。
  • tolerance (Number?)：抽稀容差值。默认为1。

返回值

• (Feature<\LineString>|Feature<\MultiLineString>|Feature<\Polygon>|Feature<\MultiPolygon>|FeatureCollection<\LineString>|FeatureCollection<\MultiLineString>|FeatureCollection<\Polygon>|FeatureCollection<\MultiPolygon>)：抽稀后的GeoJSON要素。

示例

var geojson = {
  "type": "Feature",
  "geometry": {
    "type": "LineString",
    "coordinates": [
      [-122.03472661972076, 37.42168115996257],
      [-122.0304708480835, 37.42247172824014],
      [-122.03019475936889, 37.42094015591943],
      [-122.02776622772217, 37.41877534278921],
      [-122.02466845512378, 37.41548487619012],
      [-122.02313399314878, 37.41390114391681]
    ]
  },
  "properties": {}
};

var simplified = turf.simplify(geojson);

参考文献

• Turf.js - Simplify