Banks surveying for erosion monitoring
Banks surveying carried out by drone in French Guiana. Maman Valentin dam, July 2016: results obtained from 1460 aerial images taken by the Qualiconsult group, expert in diagnostics and technical inspections of constructions.
Topographic inspection of the banks
![Banks surveying](https://www.dronesimaging.com/wp-content/uploads/2016/09/Digital_Surface_Model_Ortho_dam_Drones-Imaging%C2%A9.jpg)
Elevation map of the banks
![Banks surveying](https://www.dronesimaging.com/wp-content/uploads/2016/09/Digital_Surface_Model_dam_Drones-Imaging%C2%A9.jpg)
As illustrated above, orthophoto and digital surface model made it possible to build an elevation map of the 11 basins over a 500m length for a total of 3.7m drop. Subsequently and thanks to future flights with drone, this elevation map will serve as a reference to measure and monitor the erosion of the banks over time.
TECHNICAL INFORMATIONS
- Geomatics and post processing service : Drones Imaging company.
- Flights and aerial imagery : Qualiconsult Group.
- Spatial accuracy : centimeter with GNSS RTK receiver.
- Orthophoto RVB : GSD 1cm.
- Covered area : 06ha.
- Drone : Mikrokopter.
- Camera : Sony A6000.
- Photogrammetry software : Agisoft Metashape.
- Use case taught in aerial photogrammetry training : see more.