Generación del modelo digital de terreno de la zona correspondiente a la confluencia entre la quebrada “el batán” y el río machángara mediante levantamiento aerofotogramétrico empleando el uav de la escuela politécnica nacional para la obtención del perfil longitudinal y secciones transversales para un posterior estudio morfométrico en laderas.

Abstract

Nowadays, the aerial photogrammetric survey is one of the most widely used techniques for making Digital Terrain Models (DTM), allowing us to obtain specific information about a terrain quickly and safely. In this context, the present study aims to generate the DTM of the convergence between the "El Batán" stream and the "Machángara" River through an aerial photogrammetric survey using the Unmanned Aerial Vehicle (UAV) of the National Polytechnic School as a contribution for further morphometric studies on slopes. To carry out the aerial photogrammetric survey, it was necessary to pinpoint some ground control points (GCPs) through XYZ coordinates obtained with two Trimble receivers applying the RTK positioning method to georeference the products obtained. The flight plan and captured photographs processing were executed by the PIX4D photogrammetric software, considering "Full" and "Low" resolution. These images were compared to the total processing time, RSM Error, and outputs produced. The products obtained have excellent precision and resolution despite the difference in the resolution rates. The "Full" resolution error was for X = 0.006549m, Y = 0.017582m, Z = 0.017414m, and the "Low" resolution error was for X= 0.104152m, Y= 0.026002m, Z= 0.044701m, considering that the RSM Error is below the centimeter it is possible to determine that the results are reliable and can be used in further studies.