Nordin, Zieziyana, and Anuar Mohd Salleh. “Application of Unmanned Aerial Vehicle (UAV) in Terrain Mapping: Systematic Literature Review”. International Journal of Sustainable Construction Engineering and Technology 13, no. 4 (November 13, 2022): 216–223. Accessed July 18, 2024. https://publisher.uthm.edu.my/ojs/index.php/IJSCET/article/view/12836.