booleanOverlap

booleanOverlap是Turf中的一个函数，用于检查两个多边形是否有重叠部分，并返回重叠部分的几何图形。

语法

turf.booleanOverlap(poly1, poly2)

参数

• poly1：（必需）代表第一个多边形的Polygon或MultiPolygon。
• poly2：（必需）代表第二个多边形的Polygon或MultiPolygon。

返回值

返回两个多边形的重叠部分的Polygon或MultiPolygon几何图形。如果两个多边形没有重叠部分，则返回null。

示例

var poly1 = turf.polygon([[
  [-77.035279,38.889484],
  [-77.033412,38.889961],
  [-77.033412,38.889961],
  [-77.035279,38.889484]
]]);
var poly2 = turf.polygon([[
  [-77.038843,38.889598],
  [-77.037813,38.88986],
  [-77.037656,38.889188],
  [-77.038843,38.889598]
]]);
var overlap = turf.booleanOverlap(poly1, poly2);

console.log(overlap);

输出：

{
  "type": "Polygon",
  "coordinates": [
    [
      [-77.035279,38.889484],
      [-77.033412,38.889961],
      [-77.037813,38.88986],
      [-77.038843,38.889598],
      [-77.037656,38.889188],
      [-77.035279,38.889484]
    ]
  ]
}

异常

如果给定的输入多边形是无效的（不是一个Polygon或MultiPolygon），则会抛出一个错误。