使用laspy保存时值错误

Question

我试图使此代码打开LAS文件，进行更改，然后将结果保存在一个新的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密码。唯一的办法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() 

当我试图存储X值时，我遇到了这个问题：

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]

您试图分配由一个元素组成的outfile.X列表-- np.array listx1。并期待着只有np.array。尝试使用以下代码

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