Las/Laz reading and writing in python
Project description
pylas
Another way of reading point clouds in the LAS/LAZ in Python.
Examples
Directly read and write las
import pylas
las = pylas.read('filename.las')
las.points = las.points[las.classification == 2]
las.write('ground.laz')Open data to inspect header (opening only reads the header and vlrs)
import pylas
with pylas.open('filename.las') as f:
print(f"Point format: {f.header.point_format}")
print(f"Number of points: {f.header.point_count}")
print(f"Number of vlrs: {len(f.header.vlrs)}")Use the ‘chunked’ reading & writing features
import pylas
with pylas.open('big.laz') as input_las:
with pylas.open('ground.laz', mode="w", header=input_las.header) as ground_las:
for points in input_las.chunk_iterator(2_000_000):
ground_las.write_points(points[points.classification == 2])Appending points to existing file
import pylas
with pylas.open('big.laz') as input_las:
with pylas.open('ground.laz', mode="a") as ground_las:
for points in input_las.chunk_iterator(2_000_000):
ground_las.append_points(points[points.classification == 2])Documentation
Documentation is hosted on ReadTheDocs .
Dependencies & Requirements
Supported CPython versions are: 3.6, 3.7, 3.8, 3.9
pylas supports LAS natively, to support LAZ it needs one of its supported backend to be installed:
lazrs
laszip
Installation
pip install pylas # without LAZ support
# Or
pip install pylas[laszip] # with LAZ support via LASzip
# Or
pip install pylas[lazrs] # with LAZ support via lazrsSee the Installation section of the documentation for details:
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