形状几何相交 - 在哪些情况下线串和多边形会相交？
问题描述：
Attached image shows the LineString or rather LineRing and a polygon. I expect them to intersect but they don not as per shapely intersects我有两个我期望相交的几何图形。但他们没有。一个是线串（形成一个环）和另一个完全在线串内的小方形多边形。它不会触及任何线路点。 看着千篇一律的交叉路口文件，我期望他们相交，但他们不; t。形状几何相交 - 在哪些情况下线串和多边形会相交？
geom1 = LINESTRING (-68.41186519999999 -19.429039, -68.35556029999999 -19.5293773, -68.24775699999999 -19.5717596, -68.1444168 -19.6110584, -68.0488014 -19.5375473, -67.87353520000001 -19.5287301, -67.75165560000001 -19.4610893, -67.67972949999999 -19.4220778, -67.7508831 -19.389615, -67.9814672 -19.3241436, -68.0075276 -19.2455493, -67.9786563 -19.1669174, -68.0376756 -19.0532041, -68.10563740000001 -19.1637403, -68.14785809999999 -19.1696967, -68.1900787 -19.1185707, -68.25668330000001 -19.1775984, -68.3349609 -19.1970534, -68.3638 -19.2152094, -68.4386444 -19.2709616, -68.44757079999999 -19.3370618, -68.41186519999999 -19.429039)
Geom2 = tile_polygon_geom = MULTIPOLYGON (((-68.203125 -19.331878, -68.203125 -19.352611, -68.181152 -19.352611, -68.181152 -19.331878, -68.203125 -19.331878)))
如果我编辑LINESTRING为多边形 - 保持积分相同，只是改变了测试LINESTRING多边形我看到的外部和内部多边形相交。
("POLYGON((-68.41186519999999 -19.429039, -68.35556029999999 -19.5293773, -68.24775699999999 -19.5717596, -68.1444168 -19.6110584, -68.0488014 -19.5375473, -67.87353520000001 -19.5287301, -67.75165560000001 -19.4610893, -67.67972949999999 -19.4220778, -67.7508831 -19.389615, -67.9814672 -19.3241436, -68.0075276 -19.2455493, -67.9786563 -19.1669174, -68.0376756 -19.0532041, -68.10563740000001 -19.1637403, -68.14785809999999 -19.1696967, -68.1900787 -19.1185707, -68.25668330000001 -19.1775984, -68.3349609 -19.1970534, -68.3638 -19.2152094, -68.4386444 -19.2709616, -68.44757079999999 -19.3370618, -68.41186519999999 -19.429039))”)
即代码下面的代码输出“几何形状相交”
geometry1 = wktloads ("POLYGON((-68.41186519999999 -19.429039, -68.35556029999999 -19.5293773, -68.24775699999999 -19.5717596, -68.1444168 -19.6110584, -68.0488014 -19.5375473, -67.87353520000001 -19.5287301, -67.75165560000001 -19.4610893, -67.67972949999999 -19.4220778, -67.7508831 -19.389615, -67.9814672 -19.3241436, -68.0075276 -19.2455493, -67.9786563 -19.1669174, -68.0376756 -19.0532041, -68.10563740000001 -19.1637403, -68.14785809999999 -19.1696967, -68.1900787 -19.1185707, -68.25668330000001 -19.1775984, -68.3349609 -19.1970534, -68.3638 -19.2152094, -68.4386444 -19.2709616, -68.44757079999999 -19.3370618, -68.41186519999999 -19.429039))”)
gepmetry2 = wktloads ("MULTIPOLYGON (((-68.203125 -19.331878, -68.203125 -19.352611, -68.181152 -19.352611, -68.181152 -19.331878, -68.203125 -19.331878)))")
if geometry1.intersects(gepmetry2):
self.logger.info("geometries intersect")
else:
self.logger.info("geometries do not intersect")
有人可以解释什么是LINESTRING的交叉点和多边形中，如果： 1）多边形线和在所述线串横一些点 2）多边形包含在一个线串内，没有点触摸 3）线串完全封闭在多边形内，没有点触
正如我所提到的，我期待＃2回归真实，但它没有。
文档我指的是：http://toblerity.org/shapely/manual.html
object.intersects（其他） 返回true如果对象的边界和内饰与那些任何方式相交另一个。
此谓词等同于contains（），crosses（），equals（），touches（）和within（）中的OR-ing。
谢谢！
答
geom1和Geom2不是有效地构造的几何形状。
如果你调整你的代码类似于你用geometry1和gepmetry2的办法，那么它会工作：
from shapely import geometry, wkt
linestring = wkt.loads ("LINESTRING(-68.41186519999999 -19.429039, -68.35556029999999 -19.5293773, -68.24775699999999 -19.5717596, -68.1444168 -19.6110584, -68.0488014 -19.5375473, -67.87353520000001 -19.5287301, -67.75165560000001 -19.4610893, -67.67972949999999 -19.4220778, -67.7508831 -19.389615, -67.9814672 -19.3241436, -68.0075276 -19.2455493, -67.9786563 -19.1669174, -68.0376756 -19.0532041, -68.10563740000001 -19.1637403, -68.14785809999999 -19.1696967, -68.1900787 -19.1185707, -68.25668330000001 -19.1775984, -68.3349609 -19.1970534, -68.3638 -19.2152094, -68.4386444 -19.2709616, -68.44757079999999 -19.3370618, -68.41186519999999 -19.429039)")
poly1 = wkt.loads ("POLYGON((-68.41186519999999 -19.429039, -68.35556029999999 -19.5293773, -68.24775699999999 -19.5717596, -68.1444168 -19.6110584, -68.0488014 -19.5375473, -67.87353520000001 -19.5287301, -67.75165560000001 -19.4610893, -67.67972949999999 -19.4220778, -67.7508831 -19.389615, -67.9814672 -19.3241436, -68.0075276 -19.2455493, -67.9786563 -19.1669174, -68.0376756 -19.0532041, -68.10563740000001 -19.1637403, -68.14785809999999 -19.1696967, -68.1900787 -19.1185707, -68.25668330000001 -19.1775984, -68.3349609 -19.1970534, -68.3638 -19.2152094, -68.4386444 -19.2709616, -68.44757079999999 -19.3370618, -68.41186519999999 -19.429039))")
if poly1.intersects(linestring):
print("linestring intersects")
else:
print("linestring does not intersect")
poly2 = wkt.loads ("MULTIPOLYGON (((-68.203125 -19.331878, -68.203125
-19.352611, -68.181152 -19.352611, -68.181152 -19.331878, -68.203125 -19.331878)))")
if poly1.intersects(poly2):
print("polys intersect")
else:
print("polys do not intersect")