High water levels and floods increasingly show the importance to properly monitor the condition of our dikes. With geophysical research, deformations and weak spots in dike can be detected quickly and efficiently. This can be done from ground level but also from the air using a drone. Drone IR Thermography T&A Survey Drone Services conducts dike inspections using a drone equipped with an Infrared (IR) thermography camera. The IR thermography camera provides a thermogram, a visual representation of the temperatures on the object of measurement, with different colors indicating different temperatures. Weak spots in dikes are often not visible to the eye, but can easily be recognized on thermography images. It is therefore important to have the GPS coordinates of each recording, in order to accurately locate weak spots.
Drone LiDAR With a LiDAR (Laser Imaging Detection And Ranging) sensor attached to a drone, T&A Survey Drone Services can register the geometry of dike bodies in detail. The LiDAR sensor measures the distance to a point in the surroundings using a laser pulse. This results in a point cloud of millions of points, each with a position (x, y, z) and a reflection value. The end result is a very accurate 3D image of the surface of the dike.
Photogrammetry is the creation of maps using digital aerial photographs made by a special, high-resolution photo camera. By attaching this lightweight camera to a drone, high-resolution digital 3D aerial photographs are generated which are then processed with special software.