Análise comparativa na aquisição de dados de fotogrametria e LiDARcom uso de VANT - estudo de caso no Parque Ecológico das Timbaúbas, Juazeiro do Norte, Ceará.

Abstract

The advancement of geotechnologies has democratized access to spatial data acquisition, making the use of Unmanned Aerial Vehicles (UAVs) an indispensable tool for high- resolution mapping. This article presents a comparative analysis between photogrammetry and Laser Scanner (LiDAR) data acquisition methods, both mounted on UAVs, aimed at generating Digital Terrain and Surface Models. The case study was conducted in the Timbaúbas Ecological Park, located in Juazeiro do Norte, Ceará, an area of significant environmental and urban interest due to its essential function as a natural drainage system for rainwater. Data was obtained using a DJI Matrice 300 RTK drone, equipped with the Zenmuse L1 sensor, and positional accuracy was ensured using control points tracked with Trimble DA2 RTX GNSS receivers. Initial processing was performed in DJI Terra software, followed by classification and analysis of point clouds in Global Mapper. The results demonstrate that LiDAR showed greater altimetric accuracy in representing the terrain, especially in areas with dense vegetation, confirming the initial hypothesis of the study. It is concluded that the use of LiDAR provides more robust technical support for urban planning and drainage area management, establishing itself as the most suitable technology for high- precision topographic surveys.