union
Takes two or more polygons and returns a combined polygon. If the input polygons are not contiguous, this function returns a MultiPolygon feature.
获取两个或多个多边形，并返回一个组合多边形。如果输入的多边形不是连续的，这个函数将返回一个MultiPolygon。
参数
| 参数 | 类型 | 描述 |
|---|---|---|
| A | ...Feature <Polygon> | polygon to combine |
返回
Feature <(Polygon|MultiPolygon)> - a combined Polygon or MultiPolygon feature
示例
var poly1 = turf.polygon([[
[-82.574787, 35.594087], // 注意：polygon首尾坐标要一致
[-82.574787, 35.615581],
[-82.545261, 35.615581],
[-82.545261, 35.594087],
[-82.574787, 35.594087]
]], {"fill": "#0f0"});
var poly2 = turf.polygon([[
[-82.560024, 35.585153], // 注意：polygon首尾坐标要一致
[-82.560024, 35.602602],
[-82.52964, 35.602602],
[-82.52964, 35.585153],
[-82.560024, 35.585153]
]], {"fill": "#00f"});
var union = turf.union(poly1, poly2);
