Lidar data visualization: Difference between revisions
From wikiluntti
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[[https://github.com/grantbrown/laspy Laspy Github]] [[https://pypi.org/project/laspy/ LasPy]] | [[https://github.com/grantbrown/laspy Laspy Github]] [[https://pypi.org/project/laspy/ LasPy]] | ||
<syntaxhighlight lang="python"> | |||
las = pylas.read( fname ) | |||
#np.all(las.user_data == las['user_data']) | |||
point_format = las.point_format | |||
print( point_format ) | |||
print( point_format.id ) | |||
print( list(point_format.dimension_names) ) | |||
from mpl_toolkits import mplot3d | |||
import matplotlib.pyplot as plt | |||
fig = plt.figure() | |||
ax = plt.axes(projection='3d') | |||
N=5000 | |||
ax.scatter3D(las.X[:N], las.Y[:N], las.Z[:N], c=las.Z[:N], cmap='Greens'); | |||
</syntaxhighlight> | |||
=== Interpolate Lidar Data === | === Interpolate Lidar Data === | ||
[[https://jblindsay.github.io/ghrg/WhiteboxTools/interpolate_lidar.html]] | [[https://jblindsay.github.io/ghrg/WhiteboxTools/interpolate_lidar.html]] | ||
Revision as of 11:09, 30 January 2021
Introduction
Use Lidar data, post analyze it with Python/ Pandas? and use Blender to visualize it.
Theory
The free Lidar data set are available e.g. at Opentopography.org. We use both, the Tif data and LAS data of IT-Ren, Fluxnet site
LAS File Format
LAS@Wikipedia how to print lidar file format las
a) Headers.
b) VLR: Variable Length Record. Include 1) header and 2) payload.
c) Point records. Different point formats 0-10.
LAS in Python
[Laspy Github] [LasPy]
las = pylas.read( fname )
#np.all(las.user_data == las['user_data'])
point_format = las.point_format
print( point_format )
print( point_format.id )
print( list(point_format.dimension_names) )
from mpl_toolkits import mplot3d
import matplotlib.pyplot as plt
fig = plt.figure()
ax = plt.axes(projection='3d')
N=5000
ax.scatter3D(las.X[:N], las.Y[:N], las.Z[:N], c=las.Z[:N], cmap='Greens');
Interpolate Lidar Data
[[1]]
