3D laser scanning vs total station for mine surveying
A total station measures the points the surveyor chooses, one at a time, very accurately. A laser scanner measures everything in view — millions of points in under two minutes from a tripod, or the whole drive at walking pace on the move.
The choice does not turn on accuracy. It turns on what happens when a question comes up about a point nobody chose to shoot.
Laser scanner or total station for mine surveying?
The scanner for surfaces — walls, headings, stopes, stockpiles; the total station for control and for the single point that must be right to the millimetre.
How they compare
These are the criteria a survey manager decides by, not a spec dump.
| Laser scanner (Artec Ray II / Jet)Every surface in view, from a tripod or on the move. | Total stationSelected points, measured one at a time. | |
|---|---|---|
| What is recorded | Millions of points; the whole surface | A few dozen to a few hundred chosen points |
| Time on site | Under two minutes per tripod station; a heading at walking pace | Minutes per set-up, hours per heading; an operator at the instrument throughout |
| Accuracy | 1.9 mm at 10 m on a tripod; ±10 mm underground on the move | Millimetre-class per point, better than any scanner |
| Unplanned measurement later | Yes — any dimension, from the model, months later | No — if it was not shot, it is not there |
| Where it cannot go | Jet enters stopes, shafts and old workings on a pole, cage or drone | Nowhere the operator cannot stand with line of sight to the target |
| Output | Point cloud, mesh, sections, volumes, change maps; LAS, LAZ, E57 | Coordinates, and a wireframe drawn from them |
| Choose this when | Choose this for every surface: headings, walls, stopes, stockpiles, plant. | Choose this for control, and for the single point that has to be right to the millimetre. |
A scanner survey is tied to mine grid through control a total station established. The two are not rivals; the station provides the frame, the scanner fills it.
The point nobody shot
A total station survey is complete for the questions the surveyor anticipated. Face position, a centreline, a few profile points, the crest and toe of a bench — shot, booked, done. The question that arrives later is the problem: a brow that looks undercut, a section a ventilation engineer needs the true area of, a wall a geotechnical engineer wants compared with last quarter. None of those points was shot, so someone goes back with the instrument, if the face still exists. A scanner recorded the whole surface the first time, and the answer is a measurement on the model.
The total station is still the right instrument for two things, and a comparison that pretends otherwise is a sales sheet. Control: the network of stations every survey — scanned or not — hangs on is established and maintained with a total station, and a SLAM scanner’s ±0.03% drift is reset at exactly those stations. And the single critical point: a shaft centre, a hoist rope alignment, a conveyor pulley position, where one coordinate has to be right to the millimetre and there is no value in the surface around it.
The figures behind the verdict
See a heading surveyed floor to back on one walk, then ask for a section nobody planned to measure — book a demo for your survey team.
Book a demoWhat people ask when choosing
Can we use both?
That is the normal arrangement. The total station establishes and maintains control; the scanner records surfaces between control points and ties to them. Most mines that adopt scanning keep every total station they own.
Is the scanner accurate enough for a pick-up?
For profile, advance, volumes and change, yes: 1.9 mm at 10 m from a tripod, ±10 mm underground on the move. Where a single point needs better than that, it is shot with the station and the scan gives everything around it.
How much time does the scanner save?
A tripod station takes under two minutes and records the whole area in view; a heading is picked up in the time it takes to walk it. The mining crew stops waiting for survey, which is where the time was going.
What about survey-grade volumes and reconciliation?
A stockpile measured from a tripod at 1.9 mm at 10 m is a volume computed from millions of points on the whole surface. A total station or GNSS volume is interpolated between the points someone could shoot. The scanner’s volume is the one that stands up.
Other comparisons
Tell us what you survey with a total station today
Describe the jobs, the frequency and where the time goes. A mining specialist will come back with which of them a scanner would take over and which the station should keep.