Evaluación de Modelos Digitales de Elevación usando datos LiDAR e imágenes satelitales.

Abstract

Digital Elevation Models (DEM), are necessary to develop projects related to civil engineer and natural resource management. However, their availability in high resolution is limited, for which reason the present research work evaluates the suitability of different sources where a DEM can be obtained (e.g. global satellites). Furthermore, a comparison of these models is performed using similar products of high resolution, which was generated using the relative new system LiDAR (Light Detection And Ranging). As evaluation parameters for the different DEM, it was selected the morphometric characteristics of a watershed located in southern Ecuador, between Loja and Zamora provinces. From these characteristics, additionally attributes for hydrological analysis are derivate, such as the drainage networks. Using the so called fractal geometry, it was performed the analysis using the Multifractal Sand-box method to assess the quality of the generated geometric networks and to determine a suitable resolution that can be used in applications such as civil engineer and natural resource management.