UAV - Unmanned Aerial Vehicle is a type of unmanned aircraft, controlled remotely, to which we can adapt numerous sensors (Image, LIDAR, Thermal, Infrared, NDVI, among others), depending on the objective to be achieved and the specifications of the work, for example: topography, cartography, photogrammetry or 3D modelling of land, buildings or any other objects of study.
The topography with the aid of drones is a market in frank expansion at a global level. After all, we all have an interest in obtaining data, spending less than with the conventional model (for cases of simplified studies) or associating data from these sensors, which will complement the other techniques and technologies at our disposal, which is the most common situation in the case of TopoRigor.
Through this type of unmanned aerial vehicle, the work can improve the cost-benefit ratio, besides allowing great accessibility in places of difficult access, it allows great efficiency and rapid and precise data acquisition, when associated with specific software, techniques and precision topographic equipment.
How does surveying with drones work in practice?
Drone topography is most commonly done by 3D laser scanning (LIDAR sensors) and using aerophotogrammetry (image sensors).
These techniques in association with classic equipment (GNSS and Total Stations and 3D Laser Scanner's) allow the capture of millions of points of any object of study. Numerous by-products can be obtained after processing these data captured by the sensors, such as: extraction of altimetric quotas, longitudinal and transversal profiles, contour lines, orthorectified aerial images, orthophotomaps, point clouds, terrain triangulation models or surfaces of any object (TIN or Mesh), among others. By combining these georeferenced data, it will be possible to vectorise in 2D or model in 3D any object or scenario.
Advantage of their use, compared to manned aircraft:
Drones allow lower flights than manned aircraft, greater speed, lower associated costs and can also achieve a high level of detail of the object.
The whole process is mostly carried out remotely and quickly, and it is already possible to use it with optimal results for areas of many hundreds of hectares.