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Native Python ASPRS LAS read/write library

Project description


Laspy is a python library for reading, modifying and creating LAS LiDAR files.

Laspy is compatible with Python 3.8+.


  • LAS support.
  • LAZ support via lazrs or laszip backend.
  • LAS/LAZ streamed/chunked reading/writting.
  • COPC support over files.
  • COPC support over https with requests package.
  • CRS support via pyproj package.


Directly read and write las

import laspy

las ='filename.las')
las.points = las.points[las.classification == 2]

Open data to inspect header (opening only reads the header and vlrs)

import laspy

with'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 laspy

with'big.laz') as input_las:
    with'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 laspy

with'big.laz') as input_las:
    with'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])

API Documentation and tutorials are available at ReadTheDocs.


Laspy can be installed either with pip:

pip install laspy # without LAZ support
# Or
pip install laspy[laszip] # with LAZ support via LASzip
# Or
pip install laspy[lazrs] # with LAZ support via lazrs



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laspy-2.5.1.tar.gz (1.6 MB view hashes)

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