# Install _without_ LAZ support pip install laspy # Install with LAZ support via lazrs pip install laspy[lazrs] # Install with LAZ support via laszip pip install laspy[laszip] # Install with LAZ support via both lazrs & laszip pip install laspy[lazrs,laszip]
A conda build of laspy is available and maintained (but not by laspy)
conda install -c conda-forge laspy
lazrs is also available on conda
conda install -c conda-forge lazrs
laszip  is not available via conda.
Optional dependencies / features¶
laspy does not support LAZ (.laz) file by itself but can use one of two optional dependencies to support compressed LAZ files.
The 2 supported options are:
When encountering LAZ data, laspy will try to use one of the backend in the order described above. (Example: if lazrs is not installed or if it fails during, the process, laspy will try laszip)
lazrs is a Rust port of the laszip compression and decompression. Its main advantage is that it is able to compress/decompress using multiple threads which can greatly speed up things. However it does not supports points with waveforms.
laszip is the official and original LAZ implementation by Martin Isenburg. The advantage of the laszip backend is that its the official implementation, it supports points with waveform but does not offer multi-threaded compression/decompression.
Both the laszip bindings and lazrs are available on pip.
To install laspy with one of its supported backend use one of the commands show in the section above.
CRS / SRS¶
LAS files allows to define the CRS / SRS in which the points coordinates are.
When pyproj is installed, you can use the
LasHeader.add_crs() to add
CRS information to a file, or you can use
LasHeader.parse_crs() to get
Cloud Optimized Point Cloud (COPC)¶