Hendri Putrananda, and Melladia. “UJI AKURASI FOTO UDARA WAHANA UNMANNED AERIAL VEHICLE (UAV) DI PULAU ANGSO DUO SUMATERA BARAT ”. Journal of Scientech Research and Development, Vol. 2, no. 2, Dec. 2020, pp. 025-33, doi:10.56670/jsrd.v2i2.12.