E57

E57 is an open, standardised file format designed for the efficient storage and exchange of 3D imaging data, particularly point clouds and imagery captured through terrestrial laser scanning and similar technologies. Developed by the ASTM E57 committee, the format ensures interoperability between different manufacturers’ hardware and software, making it a valuable asset in multi-platform 3D workflows.

An E57 file can contain:

• 3D point cloud data, including XYZ coordinates, intensity, and colour information
• Sensor metadata, such as scanner position, orientation, and timestamp
• Image data, typically from panoramic or high-resolution scanner-integrated cameras

The E57 format is designed for large datasets and supports precise geometric representation. It preserves critical attributes such as colour and reflectivity, which are essential for photorealistic visualisations and precise measurements in industries like construction, heritage documentation, industrial inspection, and geospatial mapping.

Thanks to its structured and extensible design, E57 is a preferred archival and exchange format for long-term 3D data storage and interoperability across design and analysis platforms.

See also: Point cloud, Laser scanning, 3D modelling