DSM Generation with UAVs and OpenDroneMap toolkit : A parametric analysis

The use of Unmanned Aerial Vehicles (UAV) and digital photogrammetry has evolved as a versatile and low cost solution for small-to-medium scale Digital Surface Models (DSM) generation. This can be done using two different software tools: preplanned mission control software, and post-acquisition photogrammetry software. Still, even modern photogrammetry software requires a proper parameter setting that can be optimized to enhance final DSM results. In this work, we present a parametric analysis of OpenSource software called OpenDroneMap (ODM). Several DSM reconstructions were done assessing different parameter settings, and evaluating the results against local measurements and building’s construction plans aiming at optimizing the results. Also, ODM software generated orthophotos were used as an additional evaluation of the process. Optimal values of the parameters with more impact on the resulting model were found, but other considerations, relative to weather conditions, are detailed as a guide to improve the whole DSM reconstruction process.