Drone and photogrammetry

DRONE ORTHOPHOTOGRAPHY

High-definition mapping.

Orthophotographie d'une fromagerie sur fond de plan

Zoom haute définition d'une orthophotographie

Drone orthophotography

Accurate mapping of large areas

Drone orthophotography allows to map very large areas quickly and with very high definition and maximum precision. It is used in many fields such as agriculture, forestry, town planning, development, research, environmental or planning studies, etc.

Orthophotography methodology

What is drone orthophotography?

Assembly of an orthophotograph

Drone orthophotography is an assembly of very many high-resolution images taken during the overflight of an area. The drone is equipped with a high-definition camera. In some cases, a thermal camera can be added to create a thermal map.

Aerial photographs are taken at low altitudes and from several angles. They overlap with each other according to a well-defined overlapping rate. All these parameters as well as the flight plan are adjusted according to the desired rendering quality and the characteristics of the area overflown.

The shot is precisely georeferenced using a GPS RTK. Thus, the orthoimages are perfectly compatible with GIS and superimposable with other georeferenced plans.

Resolution and precision: focus on the strengths of aerial orthophotography

The resolution of a drone orthophotograph corresponds to the level of detail obtained by zooming. It essentially depends on the shooting height and the definition of the onboard camera.

It is possible to achieve resolutions of only a few centimetres per pixel, but this impacts the cost. The level of definition is therefore set according to the use that the client intends to make of the maps.

Détails précis d'une inspection de toiture

Precision corresponds to the reliability of the georeferencing and therefore to the accuracy of the cartography produced.

The development of the map rendering

After acquiring the data in the field, specialised post-processing software allows us to stitch all the photos. Defects and distortions are corrected and the final image is orthorectified.

The high-definition cartography thus developed is made available to you directly on a dedicated web application.

What is an aerial orthophotograph used for?

Aerial orthophotography enables fast and reliable measurements of lengths and areas directly on the map. It also allows to have a very precise map of an area, with a high level of detail, on which it is possible to zoom in strongly to visualise useful details.

Our online mapping system allows you to perform these operations easily, without having to invest in expensive software.

Application of orthophotography

Ideas for applications of drone orthophotography

Agricultural monitoring

Drone orthophotography allows to follow the development of crops and identify any problems. The objective is to rationalise the supply of nutrients and pesticides, limiting the associated costs and the impact on the environment.

Mapping of the natural environment

Research organisations, archaeologists, geologists, environmental design offices and services responsible for the management of natural environments also use aerial orthophotography.

The high quality of the rendering allows in particular to :

5Follow the evolution of the dunes
5Identify and count plant or animal species
5Monitor the state of a water body in the event of pollution or invasion by water primrose or green algae
5Monitor the maintenance of hiking trails or cycle paths in the forest area
5Manage rivers and streams