C-DRONE GUIDE · 25 JULY 2026
Landfill cell volume survey by drone: ISDND monitoring, remaining capacity, price
A non-hazardous waste storage cell (ISDND, the French term for a landfill cell) is not just a hole filled until it overflows: its authorised capacity is fixed to the cubic metre by the prefectural permit, and the operator must prove, month after month, how much of it is left. A classic RTK-GPS topographic survey, done on foot, takes a full day and only covers a sample of points on an active cell spanning several hectares, amid unstable slopes, moving compaction machinery and an underground biogas network. The drone changes the equation: a flight of about twenty minutes produces a complete digital surface model of the cell, compared with the previous month's survey to derive an exact filled volume, compacted tonnage and remaining capacity. Here is how a drone landfill cell survey unfolds, what the regulations require, and what it costs in 2026.
Published on 25 July 2026, reviewed on 6 August 2026 — regulations in force as of August 2026.
A regulatory obligation, not just a management convenience
Non-hazardous waste storage facilities fall under heading 2760-2 of the French classified installations nomenclature (ICPE) and require a prefectural permit. The ministerial order of 15 February 2016 governing their operation requires the operator to update the topography of each active cell at least once a year and to evaluate the storage capacity still available against the volume authorised by the permit. This is not a formality: exceeding the authorised elevation, even locally, exposes the operator to a non-compliance finding by the classified installations inspectorate.
In practice, most operators go well beyond the annual minimum: monthly or quarterly monitoring is used to allocate the day's tipping areas, anticipate when a cell will close, size the intermediate cover, and prepare, months in advance, the file for a capacity extension or a cell raise once the remaining capacity runs low. A study published in 2022 in the journal Waste Management by Filkin, Sliusar, Huber-Humer, Ritzkowski and Korotaev compared several drone survey protocols on real waste storage sites and concluded that airborne photogrammetry offers sufficient accuracy for this volumetric monitoring, at a cost and frequency far better than a classic topographic survey can achieve (see the study on Google Scholar).
How a survey of an active cell unfolds
The method mirrors quarry stockpile cubing, applied to ground that moves faster: a highly overlapping photo grid covers the whole active cell, complemented by ground control points or an RTK/PPK drone so the differences measured from one month to the next reflect real waste settlement rather than survey imprecision. The flight is coordinated with operations: tipping-truck rotations and compactor passes are avoided, and an early- or late-day window is preferred to limit dust and other disturbances that could affect image quality.
The resulting digital surface model is compared with the previous survey: the volume difference, once an average compaction density is applied, gives an estimated tonnage buried over the period and the exact remaining capacity against the authorised volume. The same flight also documents the geometry of the slopes and cover embankments, useful for checking their stability and anticipating differential settlement of the kind described in our guide on drone landslide monitoring.
Beyond volume: cover, biogas, compliance
The same flight often serves several purposes at once. The daily cover of waste, required by regulation to limit windblown litter, odours and wildlife access, is checked visually on the orthophoto — an area left uncovered stands out immediately. The biogas capture network, ever-present on the surface of an active cell (wells, pipework, flare), benefits from the same pass for a visual check of its integrity; if a diffuse leak is suspected, an optical gas imaging camera can extend the mission, using the method described in our guide on drone methane leak detection. Finally, the risk of waste self-heating — better known from composting, detailed in our guide on composting platform thermography — is also monitored by targeted thermography on a recently covered cell.
The drone does not replace piezometers, fixed biogas sensors or the regulatory checks on leachate: it complements that instrumentation with a georeferenced overview, repeatable at low cost, that puts hard numbers on what the operator previously judged by eye while walking the site.
The price of a drone landfill cell survey in 2026
Pricing depends on the cell's surface area, how often flights recur, and the expected deliverable (a simple surface model or a cubing report usable for the regulatory file). Orders of magnitude observed in France in 2026:
| Service | Observed price (excl. VAT) |
|---|---|
| One-off cell survey (under 5 ha, DSM + orthophoto) | €500 to €1,000 |
| Comparative cubing report (filled volume, estimated tonnage, remaining capacity) | +€200 to €500 |
| Monthly subscription (multi-cell site, automated comparison) | €4,000 to €9,000/year |
| RTK/PPK precision with ground control points | +€200 to €400 per campaign |
| Biogas capture network visual check option | +€150 to €300 |
Set against the cost of a classic topographic survey mobilising a surveyor on site for a full day at each visit, the gap narrows quickly once the frequency becomes monthly — and the drone covers the whole cell rather than a sample of points. To put these amounts in context among other services, see our guide how much a drone service costs.
Frequently asked questions about drone landfill cell surveys
Does the drone replace the surveyor for the regulatory file? Not always: depending on the requirements of the regional environmental authority or the prefect, some official files (annual declaration, extension request) still require a plan signed by a licensed surveyor. The drone covers frequent operational monitoring and prepares those files with up-to-date data.
Can you fly over a cell with machinery working? Yes, with a flight plan that avoids traffic zones and coordination with the operator; the flight generally falls under the open category, sub-category A2 or A3 depending on how close ground personnel are.
Does the tonnage calculated from the volume feed the TGAP tax declaration? No: France's general tax on polluting activities is declared from tonnages weighed on the weighbridge at the site entrance. The volume measured by drone serves capacity monitoring and internal consistency, not the tax declaration.
How long does a flight take? About twenty to forty minutes for a cell spanning a few hectares, with data processing included in the report delivery time, usually within 48 to 72 hours.