TY - JOUR AU - Quoc Long NGUYEN AU - Xuan Nam BUI AU - Xuan Cuong CAO AU - Van Canh LE PY - 2022/01/13 Y2 - 2024/03/28 TI - An approach of mapping quarries in Vietnam using low-cost Unmanned Aerial Vehicles JF - Inżynieria Mineralna JA - IM VL - 2 IS - 2 SE - DO - 10.29227/IM-2019-02-79 UR - https://inzynieriamineralna.com.pl/index.php/testowe/article/view/318 AB - In Vietnam, there are a huge number of quarries that areexploited and mainly provide materials to the construction sector of thecountry. However, most of the quarries are operating without topographicplans due to a lack of surveying activities. This paper introduces anapproach of using low-cost UAVs to produce digital surface models whichin turn are used to draw topographic maps of quarries in Vietnam. Forassessments of accuracy, safety, and working efficiency, four quarriesdifferent in terrain conditions, namely Luong Son, Long Son, Nui Nho, andNui Dai were selected as the study areas. Ground control points wereestablished in each area by using GNSS/RTK for camera calibration andaccuracy assessment. The accuracy of DSM was assessed using the rootmean-square error (RMSE) in X, Y, Z, XY, and XYZ components.Capturing images from each site were processed by usingAgisoft®PhotoScan Professional 1.5.2. The results showed that all theDSM models of the four areas have high accuracy, RMSE on the checkedGCPs ranges from 1.0 to 9.0 cm, from 1.2 to 5.0 cm, from 4.4 to 13.4 cm,from 1.6 to 10.3 cm, and from 4.9 to 16.9 cm for X, Y, Z, XY, XYZcomponents, respectively. We concluded that the low-cost UAV basedmapping technology can guarantee the accuracy of DSMs, the safety ofUAV flying, and the efficiency of surveying working simultaneously whenusing in quarries. ER -