如何从Shapely多边形切片x和y坐标？ [TypeError：“多边形”对象不可迭代] [英] How can I slice x and y coordinates from a Shapely polygon? [TypeError: 'Polygon' object is not iterable]

问题描述

如何从Shapely多边形中切片 x 和 y 坐标？

How can I slice x and y coordinates from a Shapely polygon?

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

推荐答案

您需要检索外部或内部线性环，并将其输入numpy。然后，您可以轻松地分割坐标。

You need to retrieve the exterior or interior Linear Ring and feed these into numpy. You can then easily slice the coords.

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])

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