Question

Takes two polygons and finds their intersection. If they share a border, returns the border; if they don't intersect, returns undefined.
取两个多边形并找到它们的交点。如果它们共享一个边界，返回边界;如果它们不相交，返回undefined。

参数

参数	类型	描述
poly1	Feature <Polygon>	the first polygon
poly2	Feature <Polygon>	the second polygon

返回

(Feature|null) - returns a feature representing the point(s) they share (in case of a Point or MultiPoint ), the borders they share (in case of a LineString or a MultiLineString ), the area they share (in case of Polygon or MultiPolygon ). If they do not share any point, returns null.

示例

var poly1 = turf.polygon([[
  [-122.801742, 45.48565], // 注意：polygon首尾坐标要一致
  [-122.801742, 45.60491],
  [-122.584762, 45.60491],
  [-122.584762, 45.48565],
  [-122.801742, 45.48565]
]]);

var poly2 = turf.polygon([[
  [-122.520217, 45.535693], // 注意：polygon首尾坐标要一致
  [-122.64038, 45.553967],
  [-122.720031, 45.526554],
  [-122.669906, 45.507309],
  [-122.723464, 45.446643],
  [-122.532577, 45.408574],
  [-122.487258, 45.477466],
  [-122.520217, 45.535693]
]]);

var intersection = turf.intersect(poly1, poly2);