Otzhanov T.K Отжанов Т.К, and Zhuparkhan B. Жупархан Б. 2023. “Use of Zala 421-16 E Unmanned Aerial Vehicle for Construction of Orthophotoplan of Linear Objects”. Рroblems of Engineering and Professional Education 23 (2-3):33-35. https://doi.org/10.32523/2220-685X-2014-23-2-3-33-35.