TL;DR: This industrial surveying FAQ answers the questions Australian maintenance managers, project engineers and site managers ask most before commissioning a survey — from accuracy and equipment through to datums, cost, CASA drone rules and shutdown turnaround. Industrial surveying measures plant, structures and ground to millimetre tolerances so engineering decisions rest on verified geometry, not assumptions.
Key takeaways
- Industrial surveying spans mechanical, civil/engineering, UAV/aerial and shutdown work — different disciplines, different instruments, but all reporting to a common control framework.
- Achievable accuracy ranges from ±1 mm over 500 m for total station control down to sub-millimetre for short-range alignment; drone photogrammetry typically reaches 15-30 mm with ground control.
- All spatial deliverables in Australia should reference GDA2020/MGA2020 for position and AHD for height unless a local mine grid is specified.
- Commercial drone surveying is regulated by CASA under Part 101 — operators need an RPA operator's certificate (ReOC) and remote pilot licence (RePL) for the work ISS performs.
- Costs scale with scope, access and turnaround: a one-day alignment check sits around AUD $5,000, while a multi-asset 3D scanning program can exceed AUD $25,000.
What is industrial surveying, and how does it differ from land surveying?
Industrial surveying is the precision measurement of plant, machinery, structures and earthworks to support engineering, construction and maintenance — not property boundaries. Where a cadastral land surveyor establishes legal title to a few centimetres, an industrial surveyor verifies that a SAG mill girth gear runs true to a fraction of a millimetre, that a crane rail holds gauge within AS 1418 limits, or that a stockpile volume is correct to within a couple of per cent.
The discipline sits between traditional surveying, engineering metrology and asset maintenance. At ISS it covers four areas: mechanical surveys (alignment, dimensional control, laser scanning), engineering and civil surveys (control networks, set-out, as-built, volumetrics), UAV/aerial surveys (photogrammetry, LiDAR, inspection) and shutdown/turnaround support. The common thread is a rigorously controlled measurement framework so every figure is traceable and repeatable.
How accurate is industrial surveying?
Accuracy depends entirely on the instrument, the method and the distances involved — so the honest answer is "it depends, and we specify it before we start." As a guide:
- Total station dimensional control: typically ±1 mm over distances exceeding 500 m, suitable for plant control networks and crane rail.
- Short-range alignment (mills, kilns, machine bedplates): sub-millimetre, using a total station bracketed against a controlled reference network.
- Terrestrial laser scanning: range noise of roughly 1-3 mm per point at typical working distances; modelled features are usually better than the raw point noise once surfaces are fitted.
- Drone photogrammetry: commonly 15-30 mm horizontal/vertical with surveyed ground control points (GCPs); without GCPs, accuracy degrades to the level of the onboard GNSS.
- Drone LiDAR: typically 30-50 mm absolute, with strong relative accuracy for surfaces and vegetation penetration.
The right question is rarely "what is the best possible accuracy" but "what tolerance does this asset actually need" — over-specifying drives cost without improving the engineering outcome.
What equipment do industrial surveyors use?
ISS deploys instruments matched to the tolerance the job demands rather than a one-size-fits-all kit:
- Total stations — Leica and Trimble robotic total stations for control, set-out, alignment and dimensional control. These are the workhorse for millimetre-grade plant work.
- Terrestrial laser scanners — Leica and FARO scanners capturing up to roughly two million points per second to build dense, millimetre-grade 3D models of complex plant.
- GNSS receivers — Trimble RTK/network GNSS for establishing site control and broad-area set-out tied to MGA2020.
- UAV platforms — DJI aircraft (for example Matrice-class platforms) carrying RGB or LiDAR payloads for aerial mapping, volumetrics and inspection.
Every instrument carries a current calibration certificate (typically within 12 months), and the choice between, say, a total station and a scanner is driven by geometry, access and the deliverable — not preference.
What coordinate systems and datums do you work in?
In Australia, the standard horizontal datum is the Geocentric Datum of Australia 2020 (GDA2020), projected through the Map Grid of Australia 2020 (MGA2020) into the relevant UTM zone. Heights are referenced to the Australian Height Datum (AHD). ISS delivers in GDA2020/MGA2020 and AHD by default.
Many mine sites and major plants run a local mine grid — an arbitrary or historic coordinate system used across the operation. Where one exists, we work in that grid so our data drops straight into existing drawings and models, and we can supply a transformation back to MGA2020 where required for statutory reporting. Confirming the datum before mobilisation prevents the single most common and expensive data-handling error: a survey delivered in the wrong grid.
How is industrial surveying work governed by standards?
Industrial surveying draws on a combination of Australian Standards, ISO standards and asset-specific design tolerances. Crane rails, for example, are surveyed against the gauge, straightness and level tolerances in AS 1418 and the relevant crane runway standards; structural steelwork is checked against AS/NZS fabrication tolerances; and measurement uncertainty is expressed in line with ISO conventions for metrology. Surveyors also work within the spatial framework maintained under Australia's geodetic standards (GDA2020).
For drone work, the governing framework is regulatory rather than dimensional: the Civil Aviation Safety Authority (CASA) administers all commercial RPA operations.
What are the CASA rules for drone (UAV) surveys?
Commercial UAV surveying in Australia is regulated by CASA under Civil Aviation Safety Regulations Part 101. For the work ISS undertakes, that means operating under an RPA Operator's Certificate (ReOC) with pilots holding a Remote Pilot Licence (RePL). Standard operating conditions include keeping the aircraft within visual line of sight, below 120 m above ground level, clear of populous areas, and at least 30 m from people not involved in the operation. Operations near aerodromes, in controlled airspace, beyond visual line of sight, or at night require additional CASA approvals.
On mine sites and industrial facilities there is also the operator's own airspace and traffic-management requirements to satisfy — drone flights are coordinated with site control so they don't conflict with light vehicles, dozers or other aircraft.
How much does an industrial survey cost in Australia?
Cost is driven by scope, access, turnaround and travel rather than a fixed price list, but the typical ranges are:
| Scenario | Indicative cost (AUD) |
|---|---|
| One-day alignment or dimensional check | ~$5,000 |
| Multi-day 3D laser scanning program across several assets | $25,000+ |
| Drone volumetric / stockpile survey | scales with site area and processing |
| After-hours, weekend or night-shift work | 25-50% premium |
Remote and FIFO locations — the Pilbara, the Goldfields, the Bowen Basin — add mobilisation and travel. The largest hidden cost is rarely the survey fee; it is downtime. When a survey overruns a shutdown window because of poor preparation, extended downtime on a processing plant can run into tens of thousands of dollars per day, which is why preparation and a clearly written scope pay for themselves.
How long does a survey take, and what do I receive?
A simple alignment check can be completed and a preliminary result handed over on the same day. A multi-asset scanning program may take several days on site, with the formal report typically delivered within five business days of demobilisation.
Deliverables depend on the service but commonly include: a measurement report with results against tolerance, registered point clouds, 2D drawings or 3D models (point-cloud-to-CAD/BIM), volumetric reports, orthomosaics and digital terrain models for aerial work, and as-built documentation. We confirm the deliverable format — for example Recap, AutoCAD, Revit or a neutral exchange format — in the scope so the data lands in the tools your engineers already use.
Frequently asked questions
Do you work during shutdowns and turnarounds?
Yes. Shutdown and turnaround surveying is a core service and ISS operates around the clock to fit fixed maintenance windows. Rapid as-built scanning during an outage captures plant geometry while equipment is exposed, supporting tie-in design, clash detection and fit-up for replacement components — work that is impossible once the plant is running again.
Can you survey hot or running equipment?
Cold, stopped equipment gives the most accurate result because thermal expansion distorts geometry — a kiln shell can still be 100°C and thermally expanded hours after stopping. Where production cannot allow a full cooldown, hot alignment techniques and heat shielding let us survey at elevated temperatures with a defined, reduced accuracy. We confirm the approach in the scope so the right method and equipment are mobilised.
What do you need from us before mobilising?
Safe, certified access (scaffold, EWP or platform), area cleaning where scanning is involved, current as-built drawings and any previous survey data, confirmed datum or mine grid, site inductions, and a named site contact with authority to make decisions. Confirming who provides access equipment — the site, not the survey team — avoids the most common cause of standby time.
Which states and regions do you cover?
ISS works nationally, including FIFO to remote operations across Western Australia (Pilbara, Goldfields, Kwinana), Queensland (Bowen Basin, Mount Isa, Gladstone), New South Wales (Hunter Valley, Illawarra), South Australia, the Northern Territory, Victoria and Tasmania.
How do I know which survey type I actually need?
Tell us the engineering question you need answered — "is this mill aligned", "how much product is in this stockpile", "does this new module fit". We scope the discipline, instrument and accuracy to that outcome, and will say so plainly if a simpler, cheaper method will do.
Still have a question this industrial surveying FAQ hasn't covered, or ready to scope a job? Call ISS on 0407 057 015 to talk through your asset, your tolerances and your timeline. We provide a clear, fixed quote so you know exactly what you're getting — accurate data, traceable to standard, delivered when your schedule needs it.