mask
Takes any type of polygon and an optional mask and returns a polygon exterior ring with holes.
获取任意类型的多边形和一个可选的遮罩，并返回一个带孔的多边形外部环。
参数
| 参数 | 类型 | 描述 |
|---|---|---|
| polygon | (FeatureCollection|Feature <(Polygon|MultiPolygon)>) | GeoJSON Polygon used as interior rings or holes. |
| mask | (Feature <Polygon>) | GeoJSON Polygon used as the exterior ring (if undefined, the world extent is used) |
返回
Feature <Polygon> - Masked Polygon (exterior ring with holes).
示例
// 注意：polygon首尾坐标要一致
var polygon = turf.polygon([[[112, -21], [116, -36], [146, -39], [153, -24], [133, -10], [112, -21]]]);
var mask = turf.polygon([[[90, -55], [170, -55], [170, 10], [90, 10], [90, -55]]]);
var masked = turf.mask(polygon, mask);
标签：polygon,mask,holes,Feature,exterior,var
From： https://www.cnblogs.com/sexintercourse/p/18108452