THE TOTAL DRONE SURVEYING WORKFLOW

 

Creating a topographic survey with a drone is a completely different process compared to a terrestrial survey with the boots on the ground.

 A topographic surveyor models the outside world by measuring as few points and lines as possible, while surveying with a drone requires flightplanning, piloting, an entire logistic operation and photogrammetry. 

Another big challenge is that the orthophotos, elevation models and point clouds coming out from the photogrammetry process differ completely from what the engineers expect the surveyor to deliver. Civil or mine engineers want a lightweight but meaningful CAD model that they can load directly in their CAD design software packages.


 

 

FROM DRONE TO CAD MODEL IN ONLY 4 STEPS

 

Flying

 

The Drone Operator flies with a drone and acquires a set of pictures of the project site.

 

Photogrammetry

 

The Photogrammetrist creates an orthophoto and elevation model from the pictures.

 

Virtual Surveying

 

The Surveyor creates a line survey, triangulation or contours in Virtual Surveyor.

 

Civil Design

 

The Civil Designer uses the survey outputs to create a civil design in a CAD design software.





DRONE MAPPING AT KARDIA MINE

The Kardia mine in West Macedonia saves big bucks with more accurate volume measurements using drone surveying. 

The surveying team operates the following workflow on a monthly basis:

  • Flight planning with eMotion software.
  • Drone flight with the eBee RTK from SenseFly.
  • Photogrammetry with Pix4Dmapper software.
  • Removal of conveyors, measurement of volumes and drawing of breaklines with Virtual Surveyor software.
  • Constructing future excavations with Anadelta Tessera software.





 



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