The core difference
A terrestrial laser scanner (TLS) sits on a tripod and scans from fixed stations; you move it, level it and scan again, then register the stations together. A handheld SLAM scanner captures continuously as you walk — far faster, but at lower precision. 'Static' and 'terrestrial' describe the same tripod-based scanners.
Side by side
| Terrestrial (TLS) | Handheld SLAM | |
|---|---|---|
| Accuracy | 1–6 mm | 1–5 cm |
| Speed | Slow (setup per station) | Very fast (continuous) |
| Range | Up to 300 m+ | ~25–120 m |
| Best for | Precision, detail, deformation | As-built, BIM, large volumes fast |
When each wins
Pick a TLS when millimetres matter: facade detail, structural deformation, forensic or heritage recording where you can afford the time. Pick SLAM when the clock and the square-metres matter more than the last millimetre — and read the SLAM accuracy guide to confirm 1–3 cm meets your tolerance.
The hybrid workflow
Many firms run both: SLAM for fast bulk capture across the whole site, then a TLS on the handful of areas that demand millimetre detail. Registered together, you get complete coverage without scanning everything slowly.
Questions fréquentes
Is SLAM less accurate than a terrestrial laser scanner?
Yes. A terrestrial (tripod) laser scanner reaches 1–6 mm, while handheld SLAM reaches 1–5 cm. SLAM is far faster, so the choice is speed versus precision.
What is the difference between SLAM and a static laser scanner?
A static (terrestrial) laser scanner scans from a fixed tripod station and is very precise but slow. SLAM scans continuously as you walk, trading precision for speed.
Should I buy a SLAM scanner or a terrestrial laser scanner?
Buy SLAM if your work is mostly fast as-built, BIM and volume capture at 1–5 cm. Buy a terrestrial scanner if you regularly need millimetre precision and can spend the time.