Mobile or static laser scanner — which one suits your building?
A static scanner is set up on a tripod, scans from where it stands, and is moved to the next station. A mobile scanner is carried and captures continuously as you walk. Both produce a registered point cloud; they differ in accuracy, in speed, and above all in what they let you survey without emptying the building first.
The short version
- Static scanning is more accurate over long distances and on facades — the instrument does not move while measuring.
- Mobile scanning is far faster indoors and handles complexity a tripod cannot reach.
- A staircase, a cellar or a corridor costs a static scanner a station at every turn.
- Mobile scanning surveys an occupied building without moving anyone out.
- Most building surveys use mobile indoors and static on facades, registered onto one base.
Side by side
| Criterion | Mobile scannerCarried. Captures while walking. | Static scannerTripod-mounted. Scans from fixed stations. |
|---|---|---|
| Method | Continuous capture while walking | Fixed stations, moved between scans |
| Accuracy | ±2 to ±5 mm relative, over a room | ±1 to ±2 mm, best over distance |
| Speed indoors | A flat in half a day | Two to three times longer |
| Complex geometry | Excellent — stairs, corridors, voids, cellars | Slow — a station at every turn |
| Long-range facades | Limited | Strong |
| Occupied buildings | Unobtrusive, occupants can stay | Intrusive, spaces must be cleared |
| Point density | High, slightly uneven | Very high and even |
| Best used for | Interiors, complex volumes, occupied buildings | Facades, large open volumes, high-accuracy work |
Mobile scanning suits
- Occupied flats and offices where nobody can be moved out
- Spiral staircases, cellars, lofts, narrow corridors and lightwells
- Buildings with many small rooms, where each would cost a station
- Surveys that have to fit into a half-day slot
- Retail or hospitality captured between services
Static scanning suits
- Facades and elevations measured from a distance
- Large open volumes — industrial halls, churches, atria
- Work where accuracy has to hold across tens of metres
- Heritage recording where the highest point density is wanted
- Sites where the building is empty and time is not the constraint
What we would do
We use both on the same job more often than not, and register them onto one coordinate base. Mobile scanning does the interior — it is what makes a half-day survey of an occupied flat possible at all — and static scanning does the facades, where accuracy has to hold across distance. Asking which is better is the wrong question; asking which parts of your building need which is the right one, and it is a question that belongs in the quote.