Uso de produtos fotogramétricos obtidos de uma aeronave remotamente pilotada (RPA) para a elaboração de projetos de engenharia

Abstract

In engineering projects, the knowledge of conventional topography is initially applied as a technique already recognized for the recognition of the terrain, its coordinates, and preponderant characteristics. However, topographic surveys can be operationally complex and long-lasting. In the light of this, new geoprocessing and coordinate determination techniques have emerged as a way to aid decision making in engineering projects by providing data similar to conventional topography, such as the remotely piloted aircraft (RPA), commonly called drones, which have embedded sensors capable of capturing georeferenced photographs of the ground. In this sense, this project sought to incorporate the use of photogrammetric projects in the elaboration of engineering projects, evaluating the cost, execution time and precision of an aerial survey carried out at the Integrated Modeling Center, in Eusébio - Ceará. As a result or survey proved to be efficient and accurate within the Brazilian law, as the planned electrical error was 0.035m, while tolerated by the Cartographic Accuracy Standard and error up to 1.75m for a chart scale. In addition, the results shown for this survey, up to three control points allowed to obtain a minimum mean square error. Regarding execution time, a service time per hectare ratio was 18 minutes per hectare, how much it costs to purchase all equipment and orders of R$ 85,000.00, however, the same materials can be rented to perform survey. It is noteworthy that the generated products, such as digital and orthomatic models, show a good level of detail compared to conventional topography.