Romero Rodríguez , H. , Sambrano Etxabe, E. and Contreras Muñoz, J.T. 2023. Topographic data collection system for the construction of contour lines using Global Positioning System. INGE CUC. 19, 1 (Mar. 2023), 117–138. DOI:https://doi.org/10.17981/ingecuc.19.1.2023.10.