Udayanga, M.K.S.C., T.D.C. Pushpakumara, and Nalin Jayarathne. “Study of the Accuracy of Sri Lankan Drone Survey Technology for Land Survey on Different Terrain Conditions: Research Article- DOI: 10.23953/cloud.Ijarsg.500”. International Journal of Advanced Remote Sensing and GIS 10, no. 1 (June 12, 2021): pp. 3463–3472. Accessed April 24, 2024. https://cloudjl.com/index.php/RemoteSensing/article/view/25.