Surveying missions

Hélicéo takes care of everything – creation of the flight plan, provision of service, the delivery of files, you name it!

Carry out your surveying missions by drone with the support of our engineers. Hélicéo will also carry out photogrammetric missions for you and your customers.

Hélicéo is at your disposal for:

  • The flight of drones surveying missions
  • The creation of DTM / DSM
  • Points cloud editing
  • The creation of orthophotographs
  • 3D video production

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Cas d'étude drone

Georeferenced aerial photographs

Aerial photographs are flight images georeferenced with the help of DroneBox RTK. They can be integrated in photogrammetric processing, allowing for 3D reconstruction of an area and creation of various deliverables (point clouds, orthophotos, DSMs/DTMs, etc.).

Aerial images and models created with them have significant value added when you want to show your customers a comprehensive view of an area, or when you want to focus on details (e.g. during an inspection).

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Orthophotos are aerial images of the Earth's surface adjusted for topographic relief. They are georeferenced images that allow identification of objects and planimetric measurements.

It is therefore possible to produce a topographical map directly from a file. Orthophotos can be exported in GeoTIFF format for adding georeferencing information to a TIFF file (Tagged Image File Format).

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Point clouds

Point clouds provide 3D information and thus enable creation of a topographic map with altitude data. Point clouds have a relative accuracy of 1-2 pixels horizontally and 2-3 pixels vertically. The .las format (LiDAR data format) is the standard format of 3D point clouds, though other formats are available (.xyz, .ply, etc.).

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A cubature is the determination of the cubic contents of different materials. It consists of measuring the volume within an area defined by a polygon. The technique is to triangulate the polygon points for a reference surface, then calculate the cut and fill volumes. This, in combination with granulometry, helps to establish an accurate measurement of the content. Cubatures are used to monitor the amount of material extracted and optimize cut/fill areas.

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A DSM (Digital Surface Model) is a 3D topographical representation of the actual surface of a study area. It is generated using aerial photogrammetric images. A DTM (Digital Terrain Model) is the same as a DSM without the elements that are not part of the land (buildings, vegetation, infrastructure, etc.). It is generated by performing a classification of land points and objects in the DSM. These two deliverables thus allow extraction of terrain features, which is useful for any topographical study. DTMs/DSMs are used for several types of applications: cut/fill management, terrain studies, surface condition, etc.

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