Quarry surveys

Periodic surveys of quarries for accurate and reliable monitoring.

 In the same way as for volumetric surveys, the point cloud is a particularly suitable form of data. It can be obtained in different ways depending on the specification :

  • airborne lidar ;
  • laser scanning with fixed stations ;
  • terrestrial photogrammetry ;
  • helicopter-borne photogrammetry ;
  • UAV (drone) photogrammetry.

Regardless of the method used, the result will be a point cloud of high density (one point per 5 to 10 cm for this type of application).

Once the point cloud has been combined and georeferenced, the processing becomes identical, whatever the method of survey.

Suitable processes are :

  • 3D mesh model (triangular irregular network or TIN) of the situation at time ;
  • comparison of the situation at time t with an earlier epoch ;
  • extraction of profiles ;
  • extraction of contours.

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Quarry surveys

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