Extracción de modelos digitales de elevación y modelos digitales de superficie mediante el uso de un VANT

Abstract

Abstract: The main objective of this research work is to extract Digital Elevation Models (DEM) through a UAV. The study area is located in the Finca La Palma of the Universidad Técnica Particular de Loja, in an area of 150 ha. Flight manoeuvres were performed, capturing 835 photographs with a TuffWing fixed-wing UAV at the height of 100 m, with an 80% overlap. The dense point cloud reconstruction was performed in Pix4D based on Structure from Motion (SFM) algorithms, establishing the distribution of Ground Control Points (GCP) on the ground. Subsequently, the FUSION v 3.8 and CloudCompare applications were used with their filtering algorithms, Ground Filter and Cloth Simulation Filter (CSF), to process the dense cloud of points and thus obtain a Digital Surface Model (DSM) and a Digital Terrain Model (DTM) validated utilizing a total station in an area of medium-low vegetation. The MDT obtained has a resolution of 5 cm/pixel, thus allowing the micro-watersheds to be characterized employing the ArcGIS Software.