🗺️ SURVEYING & PHOTOGRAMMETRY · GAP (05) · €800–3,000 PER DAY
Drone surveying & photogrammetry in Gap
Drone photogrammetry turns a few hundred aerial photos into precision survey products: georeferenced orthophotography at 1–3 cm/pixel, digital surface and terrain models, 3D point clouds, contour lines, stockpile and earthworks volume calculations. With an RTK/PPK drone and ground control points measured by centimetre-grade GNSS, accuracy reaches 2 to 5 cm both horizontally and vertically — sufficient for most development studies, at a fraction of the cost of an exhaustive ground survey.
We cover from 1 to several hundred hectares per day depending on the required resolution, including hard-to-access sites: working quarries, landfills, riverbanks, industrial wasteland. Deliverables come in your coordinate system (Lambert 93 / RGF93, conic conformal projections) and standard formats (GeoTIFF, LAS/LAZ, DXF, GIS formats). Chartered surveyors, civil engineering offices, quarry operators and local authorities are regular clients.
Free quote — surveying & photogrammetry in Gap
Rates
€800–3,000 per day — the range observed on the 2026 French market, including regulatory preparation, flight and delivery. The exact quote depends on the site, the deliverable and the airspace context in Gap.
Common use cases
- Topographic survey of land ahead of a development or subdivision project
- Stockpile volume measurement in quarries or recycling platforms
- Centimetre-grade orthophoto of a municipality for its GIS
- Digital terrain model for hydraulic or flood-risk studies
- Erosion monitoring of riverbanks, dunes or coastal cliffs
- 3D modelling of a building or monument for a digital twin
The local context in Gap
Prefecture of the Hautes-Alpes and France's highest prefecture (735 m), Gap is the gateway to the southern Alps: twenty minutes away, Lake Serre-Ponçon — western Europe's largest artificial reservoir — with the Saint-Michel chapel on its islet; to the north, the Écrins massif. Two major vigilance points: Gap-Tallard aerodrome (LFNA), one of Europe's leading skydiving and light-aviation centres, generates intense drop-zone traffic; and the core of the Écrins National Park bans drones, with motorised overflight prohibited below 1,000 metres.
Gap's economy blends administration, Alpine commerce, four-season tourism and hill farming. In the mountains the 120-metre limit is measured from the overflown terrain: slope and valley flights demand real preparation. Drone missions: lake and mountain tourism, real estate, construction monitoring, inspection of EDF structures around Serre-Ponçon (with protocols), mountain agriculture.
Applicable regulations
Survey flights mostly take place outside built-up areas, in open category A2 or A3 (photogrammetry drones weigh 900 g to 6 kg) flying automated grid patterns below the regulatory 120 m. Long corridors or populated sites fall under the specific category (STS-01/STS-02, or an operational authorisation for BVLOS on long corridors). The operator is registered on AlphaTango and checks regulated zones on Géoportail: quarries and industrial estates are often near airfields or under military low-altitude training routes (RTBA), requiring protocols or time slots. Legally binding georeferencing (enforceable boundary plans) remains the exclusive remit of chartered surveyors, with whom we work as subcontractors.
Frequently asked questions
What accuracy can a drone survey guarantee?
With an RTK drone and ground control points, we guarantee 2 to 5 cm XYZ accuracy, verified against independent checkpoints whose residuals are documented in the processing report.
Does a drone survey replace a chartered surveyor?
No for legally binding documents (boundary demarcation, land division): that is the chartered surveyor's legal monopoly. Yes for technical studies: our deliverables feed directly into civil works design, volume calculations and environmental studies.
Does vegetation interfere with photogrammetric surveys?
Yes: photogrammetry measures the visible surface, so the canopy rather than the ground beneath. For wooded areas, we offer drone LiDAR, which penetrates vegetation and reconstructs the bare terrain.
Can this service be flown anywhere in Gap?
Almost: Aérodrome de Gap-Tallard (LFNA) : parachutisme intensif; Cœur du Parc national des Écrins : drones interdits; Relief alpin : hauteur de 120 m par rapport au sol survolé. Depending on the exact location, the pilot picks the right framework (open or specific category) and files the required declarations — included in the quote.
Other drone services in Gap
- Aerial photography in Gap from €300
- Aerial video in Gap from €500
- Real estate drone services in Gap from €250
- Weddings & events in Gap from €400
- Roof inspection in Gap from €200
- Facade inspection in Gap from €300
- Aerial thermal imaging in Gap from €500
- Construction site monitoring in Gap from €250
- Precision agriculture in Gap from €8
- Security & surveillance in Gap from €600
- Immersive FPV video in Gap from €700
- High-access cleaning in Gap from €500
- Drone pilot training in Gap from €350
- All services in Gap
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