TL;DR
Aerial inspection is the use of a drone (UAV) fitted with high-resolution, thermal or LiDAR sensors to examine and measure industrial assets from the air without putting a person at height or in a confined space. An aerial inspection drone captures defect-level imagery and survey-grade data on structures such as conveyors, headframes, tanks, powerlines and tailings dams — faster, safer and at a fraction of the cost of scaffolding, rope access or an elevated work platform.
Key takeaways
- Aerial inspection uses a drone to visually examine and measure an asset from the air, replacing the need to send a worker up a structure, into a confined space, or onto an unstable face — directly addressing the highest-risk work in mining and heavy industry.
- The same flight that captures inspection imagery can be processed into survey-grade data: an aerial inspection drone tied to GDA2020 / MGA2020 and AHD delivers measurable defect locations, not just photographs.
- Commercial aerial inspection in Australia is regulated by CASA under CASR Part 101; flying a drone above 2 kg for hire requires a Remote Pilot Licence (RePL), and the operating business holds a Remotely Piloted Aircraft Operator's Certificate (ReOC).
- Sensor choice drives outcome: RGB cameras find cracks and corrosion, thermal (infrared) finds overheating bearings and electrical faults, and LiDAR or photogrammetry adds 3D geometry and measurement to the inspection record.
- A structure that once required a full shutdown, scaffold and rope-access crew over several days can often be inspected in hours while the plant keeps running — the central commercial case for aerial inspection.
What is aerial inspection?
Definition: Aerial inspection is the examination, assessment and measurement of an asset using a remotely piloted aircraft (drone) carrying optical, thermal or laser sensors, producing a visual and data record of the asset's condition without physical human access to the structure.
Aerial inspection sits at the intersection of two disciplines: asset inspection (finding defects — cracks, corrosion, wear, hot spots, structural movement) and aerial surveying (measuring position and geometry to a known accuracy). A traditional inspection answers "what is wrong?"; an aerial inspection drone answers "what is wrong, exactly where, and by how much?" — because every image can be geotagged and, where required, processed into a measurable 3D model.
What makes the drone approach transformative is the removal of the person from the hazard. Australian mining and heavy industry carry many of their worst safety exposures in inspection work: climbing headframes and conveyor galleries, entering tanks and bins, walking tailings dam walls, and working beside live electrical infrastructure. An aerial inspection drone reaches all of these from a safe standoff distance, which is why UAV inspection has become standard practice across the Pilbara iron-ore operations, Bowen Basin coal sites and the national transmission network.
Key facts about aerial inspection
- A modern aerial inspection drone such as the DJI Matrice 350 RTK with a Zenmuse H30T payload resolves sub-millimetre surface detail at close standoff, letting an inspector identify hairline cracks and corrosion pitting from a safe distance.
- Thermal payloads detect temperature differences as small as a few tenths of a degree, exposing overheating conveyor idlers, failing electrical connections and solar-panel hot cells before they cause failure or fire.
- Inspecting a 60 m headframe or a tall process structure by drone takes 30-60 minutes airborne, against the days of planning, scaffold erection and permits a manual inspection of the same asset demands.
- When flown against ground control on GDA2020 / MGA2020 (horizontal) and AHD (vertical), aerial inspection imagery becomes a measurable record — defect positions can be reported in plant coordinates, not just "third panel from the left".
- Aerial inspection is routinely combined with volumetric and as-built capture in a single mobilisation, so one site visit yields a condition report, a 3D model and stockpile or earthwork volumes.
How an aerial inspection works
An aerial inspection follows a repeatable process from planning to a defect-tagged report. A single-asset inspection is typically captured in a few hours and reported within 1-3 business days, depending on the analysis required.
Scoping and risk assessment: The asset, defect types of interest and required detail are defined. The operator prepares a job safety analysis and checks airspace — proximity to aerodromes, controlled airspace, and live operations all shape where and how the drone can fly under CASR Part 101.
Control and datum (where measurement is needed): If the inspection must produce measurable positions, ground control points are surveyed with a GNSS receiver tied to GDA2020 / MGA2020 and AHD, or the aircraft's RTK/PPK positioning is validated against check points.
Flight and capture: The drone flies a planned path around or over the asset, holding a consistent standoff distance and capturing overlapping RGB imagery, thermal video, or LiDAR. Close-quarters structural work is often flown manually by an experienced pilot; broad-area capture is automated.
Processing and analysis: Imagery is reviewed for defects; thermal data is analysed for anomalies; photogrammetry or LiDAR data is processed into a 3D model or point cloud and registered to the survey datum. Defects are tagged with location and, where modelled, dimensioned.
Reporting: Deliverables include an annotated defect register with imagery, thermal findings, and — when captured — an orthomosaic, 3D model or point cloud showing exactly where each issue sits on the asset.
Key point: A drone does not inspect — a qualified inspector does. The aircraft is a sensor-delivery platform that puts the inspector's eyes (and a calibrated measurement system) where a body cannot safely go. The value of an aerial inspection comes from the engineering judgement applied to the data, not from the flight itself.
Aerial inspection vs traditional inspection methods
Aerial inspection is one of several ways to examine a structure at height or in a hazardous location. The right method depends on access, the detail required, and whether the asset can keep operating.
| Aspect | Aerial inspection (drone) | Rope access / EWP | Scaffold + manual |
|---|---|---|---|
| Worker exposure | None — operated from the ground | High — worker at height | High — worker at height |
| Speed (tall structure) | 30-60 min airborne | Hours to days | Days (erect + inspect + dismantle) |
| Production impact | Often none — plant keeps running | Usually requires isolation | Usually requires shutdown |
| Measurable output | Yes (geotagged, modellable) | Limited, manual notes | Limited, manual notes |
| Best for | Most external structures, hard-to-reach assets | Contact tasks (thickness testing, repairs) | Heavy repair work needing a platform |
| Limitations | Weather, wind, airspace; no physical contact | Slow, high risk, costly | Slow, costly, disruptive |
Where aerial inspection is used
Aerial inspection is used wherever an asset must be examined at height, over water, in a confined space, or beside a hazard. ISS flies inspections across mining, energy, infrastructure and industrial sites Australia-wide.
Mining and resources
Inspection of headframes, conveyor galleries and transfer towers, crusher and process structures, stockpile sheds, and tailings storage facility (TSF) walls. Drones examine pit walls and high walls for instability without exposing geotechnical staff, and combine condition inspection with stockpile volumetrics in a single visit across operations such as the Pilbara iron-ore hubs and Bowen Basin coal sites.
Power and energy
Thermal and visual inspection of transmission and distribution powerlines, substation plant, and solar farms — where thermal imaging finds hot joints and failed panel cells — plus wind-turbine blade inspection that would otherwise need rope access at hub height.
Industrial plant and infrastructure
External inspection of tanks, vessels, stacks, flare structures and pipe racks during operation, and confined-space inspection of bins and silos using purpose-built indoor drones — removing the entry permit and the person from the confined space entirely.
Ports and civil structures
Wharves, jetties, bridges, conveyors over water and other marine and civil structures, where a drone reaches the underside and waterline that ground crews cannot easily access.
Aerial inspection equipment and sensors
The right sensor depends on what you need to find. ISS selects the payload per job rather than forcing every inspection onto one camera.
| Sensor | What it finds | Typical payload | Best for |
|---|---|---|---|
| RGB (high-resolution) | Cracks, corrosion, wear, missing fasteners | DJI Zenmuse H30/H30T, Mavic 3 Enterprise | General structural condition |
| Thermal (infrared) | Hot bearings, electrical faults, panel hot cells | Zenmuse H30T (radiometric), H20T | Electrical, mechanical, solar |
| LiDAR | 3D geometry, deformation, bare-earth under cover | DJI Zenmuse L2 | Measurable models, vegetated sites |
| Photogrammetry (RGB) | Full-colour 3D model and orthomosaic | Matrice 350 RTK + camera | As-built and measurable inspection records |
Frequently asked questions
What is an aerial inspection drone?
An aerial inspection drone is a remotely piloted aircraft fitted with optical, thermal or LiDAR sensors used to examine and measure an asset from the air without sending a person to height or into a confined space. It captures defect-level imagery and, when tied to a survey datum, measurable positions — making it the standard tool for inspecting structures such as conveyors, headframes, tanks, powerlines and tailings dams across Australian industry.
How accurate is aerial inspection?
Visually, a high-resolution aerial inspection drone resolves sub-millimetre surface detail at close standoff, enough to identify hairline cracks and corrosion. When the inspection must produce measurable defect positions, the imagery is tied to ground control on GDA2020 / MGA2020 and AHD, achieving survey-grade positioning typically in the 20-50 mm range. Thermal payloads detect temperature differences of a few tenths of a degree.
How much does an aerial inspection cost?
In Australia, a single-asset aerial inspection typically costs AUD 1,500-6,000 depending on the asset, the sensors required, site access, travel and the depth of analysis and reporting. This is usually far below the cost of scaffold, rope access or an elevated work platform — and avoids the production loss of a shutdown. ISS provides fixed-price quotes after a brief scoping discussion.
Do you need a licence for aerial inspection in Australia?
Yes. Commercial aerial inspection is regulated by the Civil Aviation Safety Authority (CASA) under CASR Part 101. Flying a drone above 2 kg for hire or reward generally requires the pilot to hold a Remote Pilot Licence (RePL), and the operating business to hold a Remotely Piloted Aircraft Operator's Certificate (ReOC), supported by site-specific risk assessments and any required airspace approvals.
What is the difference between aerial inspection and an aerial survey?
An aerial survey measures position and geometry — producing maps, models and volumes to a known accuracy. An aerial inspection examines an asset for condition — cracks, corrosion, wear and thermal faults. They overlap, because an aerial inspection drone can capture both at once: the same flight can deliver a defect register and a measurable 3D model, which is why ISS often combines inspection, as-built and volumetric capture in a single mobilisation.
What to do next
Aerial inspection has become the default way to examine assets at height and in hazardous locations across Australian mining, energy and infrastructure — safer, faster and often without stopping production.
- Define what you need to find. Cracks and corrosion point to high-resolution RGB; electrical and mechanical faults point to thermal; measurable defect positions or deformation point to LiDAR or photogrammetry.
- Check the constraints early. Airspace near ports, aerodromes and live operations, plus whether the asset can stay running, both shape how the inspection is flown.
Call ISS on 0407 057 015 to request a fixed-price quote for your aerial inspection. We operate CASA-certified inspection drones with RGB, thermal and LiDAR payloads across Australia, and will recommend the right sensor and control strategy for your asset.