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Home › Services › Aerial photogrammetry

Drone · LiDAR · Orthophoto

Photogrammetry
by drone

Drones fitted with LiDAR sensors, GNSS and high-resolution cameras to capture detailed aerial imagery of your surroundings.

cmdrone accuracy
LiDAR+ HD photo
halarge areas

Our approach

Large areas, with the accuracy you need.

Our photogrammetry expertise turns your aerial imagery into accurate 3D data, giving a clear, detailed picture of your land, buildings and infrastructure — from capture through to using the data.

Services

What we do

Digital terrain and surface models

Aerial or facade orthophotos

Accurate volume calculations

Vector drawing

Detailed visual inspections

Construction progress monitoring

Building surveys

Secure sharing

Method

How a flight runs

1

Flight planning

We set the area, flight height and image overlap according to the accuracy required. The zone is checked against Swiss flight rules, and any permits are obtained before we come on site.

AreaFlight planPermits
2

RTK georeferencing

Our drones correct their position in real time: every shot is tied directly to the Swiss LV95 system, with no network of ground control points. We survey a few check points by GNSS to verify and document the accuracy achieved, and we go back to a full control network when the site calls for it — poor satellite reception, or a particular accuracy requirement.

RTKLV95Check points
3

Flight and capture

The drone flies the area to the agreed plan and captures the imagery or the LiDAR cloud. A large site is covered in a morning where a ground survey would take several days.

HD photoLiDARRTK
4

Processing and delivery

The images are brought together by photogrammetric processing, and the cloud is cleaned and classified. You receive the orthophoto, the terrain and surface models, and the calculated volumes where the project calls for them.

OrthophotoDTM / DSMVolumes

Our fleet

Three drones, three uses

The aircraft is chosen for the area, the sensor needed and the constraints on site.

Matrice 300 RTK

Large areas

The workhorse for long missions and heavy sensors, LiDAR included. This is the aircraft for extensive sites and infrastructure surveys.

  • LiDAR on board
  • Long endurance
  • Infrastructure

Phantom 4 RTK

Precision mapping

Built for photogrammetric survey, with RTK correction integrated. The default choice for orthophotos and volume work.

  • Orthophotos
  • Volume calculations
  • RTK correction

Mavic 3 Enterprise RTK

Quick jobs

Compact and quick to deploy — for small areas, roof inspections and repeat monitoring flights.

  • Inspections
  • Periodic monitoring
  • Confined areas

Case studies

A few recent projects

Volume calculation

Volume calculation

Earthworks — Ballaigues
Site orthophoto avec calcul des volumes de déblai et remblai

Site orthophoto

Cut and fill calculation
Site progress monitoring

Site progress monitoring

Vevey

Frequently asked

What we get asked most often

What accuracy can you expect from a drone survey?
It depends on flight height, on the sensor, and on the positioning method. With RTK, the drone is corrected in real time and the model comes out already georeferenced in LV95, to the centimetre. We agree the target accuracy with you before the flight, based on what the data is for — a volume calculation and a construction drawing do not ask the same thing — and we verify it against check points surveyed on the ground.
Do you need a permit to fly over a site?
Depending on the zone, yes. We check the airspace status of the area and handle the formalities before we come on site. Our team holds the A2 certification for drone pilots, required in Switzerland for close-proximity flights and for carrying a LiDAR system.
Photogrammetry or LiDAR — what is the difference?
Photogrammetry reconstructs the terrain from photographs: the result is coloured and easy to read, ideal for orthophotos and open ground. LiDAR measures directly by laser and partly penetrates vegetation — it is what you need as soon as the ground under tree cover has to be mapped.
What do you get at the end?
The georeferenced orthophoto, the digital terrain and surface models, the point cloud, and depending on the project a vector drawing, contour lines or calculs de volumes for cut and fill.
How do you calculate earthwork volumes?
By comparing two surfaces: the surveyed state and a reference state — original ground, design, or the previous flight. The calculation gives cut, fill and the balance, shown directly on the orthophoto. It is the method we use on our earthworks monitoring.
Is one flight enough, or do you need to come back?
One flight is enough for a snapshot. For construction progress monitoring, we schedule repeat flights to the same flight plan: the orthophotos become comparable from one date to the next, and progress is measured rather than estimated.

Going further

Related services

Our disciplines feed into one another: the survey feeds the model, which feeds the published output.

Surveys, measurement and setting out

Land surveying

The RTK that underpin the accuracy of the flight.

Find out more →

Web map portals and GIS applications

Geographic information system

To bring orthophotos and terrain models into your GIS layers.

Find out more →

Georeferenced point clouds

3D laser scanning

On the ground and indoors, where the drone cannot go.

Find out more →

Enquiry

Have a question, or want a professional opinion? Get in touch and we'll come back to you quickly.

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