Ajayi, O.G. and Ajulo, J. 2021. INVESTIGATING THE APPLICABILITY OF UNMANNED AERIAL VEHICLES (UAV) PHOTOGRAMMETRY FOR THE ESTIMATION OF THE VOLUME OF STOCKPILES. Quaestiones Geographicae. 40, 1 (Mar. 2021), 25–38. DOI:https://doi.org/10.2478/quageo-2021-0002.