使用 laspy 保存时出现值错误

Question

我尝试对打开 LAS 文件的代码进行更改，然后将结果保存在新的 LAS 文件中。 las 文件包含具有坐标（X 和 Y）和值（如 Z 表示高程）的点。我有这个几乎可以工作的代码。唯一剩下的就是将结果点保存到一个新的 las 文件中。

import laspy
import laspy.file
import numpy as np
header = laspy.header.Header()
inFile2 = laspy.file.File("C:\Users\Geri\Desktop\Sync\pythonlas\mapperclip\2clip.las", mode = "r")
inFile3 = laspy.file.File("C:\Users\Geri\Desktop\Sync\pythonlas\mapperclip\3clip.las", mode = "r")
point_records = inFile2.points
point_records = inFile3.points

t=0
listx1=np.array([], dtype=float)
listy1=np.array([], dtype=float)
listz1=np.array([], dtype=float)
while t < 415:
    z=0
    q=0
    p=0.1
    while z==0:

        xmin=inFile3.x[t]-p
        ymin=inFile3.y[t]-p
        xmax=inFile3.x[t]+p
        ymax=inFile3.y[t]+p
        n=0
        for points in inFile2.points:
            ax=inFile2.x[n]
            ay=inFile2.y[n]
            if ax > xmin and ax < xmax and ay < ymax and ay > ymin: 

                                newx = [inFile3.x[t]-((inFile3.x[t]-inFile2.x[n])/2)]
                                newy = [inFile3.y[t]-((inFile3.y[t]-inFile2.y[n])/2)]
                                newz = [inFile3.z[t]-((inFile3.z[t]-inFile2.z[n])/2)]
                                listx1=np.append(listx1, (newx))
                                listy1=np.append(listy1, (newy))
                                listz1=np.append(listz1, (newz))
                                print listx1
                                print n
                                n+=1
                                q+=1
                                t+=1
            else:
                n+=1
        if q>0:            
            z+=1
        else:
            p+=0.1
outfile = laspy.file.File("C:\Users\Geri\Desktop\Sync\pythonlas\mapperclip\output2.las", mode="w", header=header)
outfile.X = [listx1]
outfile.Y = [listy1]
outfile.Z = [listz1]
outfile.close()

我在尝试存储 X 值时遇到了这个问题：

Traceback (most recent call last):
  File "C:\Users\Geri\Desktop\Sync\pythonlas\envisecond.py", line 48, in <module>
    outfile.X = [listx1]
  File "C:\Python27\lib\site-packages\laspy\file.py", line 277, in set_x
    self._writer.set_x(x)
  File "C:\Python27\lib\site-packages\laspy\base.py", line 1257, in set_x
    self.set_dimension("X", X)
  File "C:\Python27\lib\site-packages\laspy\base.py", line 1107, in set_dimension
    return(self._set_dimension(spec, new_dim))
  File "C:\Python27\lib\site-packages\laspy\base.py", line 1113, in _set_dimension
    self.data_provider._pmap["point"][spec.name] = value
ValueError: setting an array element with a sequence.

Answer 1

在这一行

outfile.X = [listx1]

您试图分配 outfile.X 包含一个元素的列表 - np.array listx1。预计只有 np.array。尝试使用以下代码

outfile.X = listx1
outfile.Y = listy1
outfile.Z = listz1

使用 laspy 保存时出现值错误

Valueerror when saving with laspy

python

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