如何从一个Shapely多边形切片x和y坐标？ [TypeError：'多边形'对象是不可迭代的]

Question

如何从一个Shapely多边形切片x和y坐标？

我得到以下输出：

[evaluate xyz_25_2.py] 

POLYGON ((3.449182842266765 -5.876385583121159, 2.171707715501299 -3.576930354943315, 0.6387375633827332 -1.447805143667534, -3.875007884521928 6.046715600023223, -6.004133095797705 7.750015769043845, -9.581063450741024 ..........................)) 

Traceback (most recent call last): 
File "C:\Users\abhi\Desktop\xyz_25_2.py", line 103, in <module> 
    list(concave_hull) 
TypeError: 'Polygon' object is not iterable 

Answer 1

你需要获取外部或内部线性环和饲料到这些numpy的。然后你可以很容易地分割坐标。

例如：

from shapely import geometry 
import numpy as np 

# lets create an example polygon 
p = geometry.Point(0,0) 
poly = p.buffer(100) 

# you need to get the coordinates of the exterior (shell) 
# pass these into a numpy array 
shell_coords = np.array(poly.exterior) 
print(shell_coords) 

# you can do the same for interior (holes) as well 

# then slice and dice to your heart's content 
print(shell_coords[:,:1]) 
print(shell_coords[:,1:2])