Definition
LAS and LAZ are standard file formats for storing LiDAR point cloud data. LAS is a widely adopted open format designed specifically for laser scanning and LiDAR, while LAZ is a compressed version of LAS that stores the same data in much smaller files.
Together they are among the most common ways to hold and share large LiDAR datasets. LAS keeps the data in full, and LAZ shrinks it without losing information, making storage and transfer easier.
In simple terms, LAS is the standard LiDAR point cloud format, and LAZ is its compressed, space-saving version.
How It Works
A LAS file stores each LiDAR point along with detailed attributes such as position, intensity, return information, and classification, all in a structured format built for large datasets. This makes it well suited to airborne and terrestrial LiDAR data.
LAZ applies lossless compression to LAS data, greatly reducing file size while keeping every point and attribute intact. Because it is lossless, data can be moved between LAS and LAZ freely, so teams often store and share LiDAR as LAZ and work with it as LAS.
Applications
LAS and LAZ are used in LiDAR surveying, mapping, forestry, and GIS. They store and exchange large point clouds from airborne and terrestrial LiDAR, supporting terrain mapping, classification, and analysis across geospatial workflows.
Benefits
- Standard, widely supported LiDAR formats.
- Rich per-point attributes and classification.
- LAZ compression saves storage and bandwidth.
- Lossless, so no data is lost.
- Ideal for large LiDAR datasets.
Related Terms
- LiDAR (Light Detection and Ranging)
- Point Cloud
- E57
- XYZ (Point Cloud Format)
Frequently Asked Questions
What is the difference between LAS and LAZ?
LAS stores LiDAR point data in full, while LAZ is a losslessly compressed version that holds the same data in smaller files.
What are LAS and LAZ used for?
They are used to store and share LiDAR point clouds for surveying, mapping, forestry, and GIS.
Is LAZ lossless?
Yes. LAZ compresses LAS data without losing any points or attributes.
What data do LAS files store?
They store each point with attributes such as position, intensity, return information, and classification.
About Track3D
Track3D helps teams work with LiDAR formats like LAS and LAZ to build accurate digital twins. Learn more at Track3D.
