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);