Accuracy Evaluation of Earthwork Volume Calculation According to Terrain Model Generation Method using RTK-UAV; RTK-UAV 기반 지형 모델 구축 방식에 따른 토공량 산출 정확도 평가

초록

In this study, an objective accuracy assessment was conducted by comparing the volumes estimated through photogrammetry, performed using a mobile D-GNSS (Differential-Global Navigation Satellite System) base station and an RTK (Real-Time Kinematic) UAV (Unmanned Aerial Vehicle), as well as those obtained using a LiDAR (Light Detection and Ranging) sensor, with the results from GNSS surveying. This process is a crucial step in earthwork volume calculation during ground assessment at construction sites. The study site was the slope area around the agricultural reservoir located at 312 Sangyong-ri, Hwaseo-myeon, Sangju-si, Gyeongsangbukdo, Republic of Korea. A comparison of the results from photogrammetry using RTK-UAV and those obtained with LiDAR sensors showed accuracy of 94.4% and 95.7%, respectively. These findings demonstrate that UAV-based imaging methods utilizing only RTK Stations, without the use of GCPs (Ground Control Points) and CPs (Check Points), can be applied in the process of volume estimation in actual construction sites. Furthermore, this method can contribute to more efficient and cost-effective earthwork volume estimation by significantly reducing the time and human resources required, as it only necessitates the installation of a GNSS base station at the site, without the need for additional GCPs or CPs. © 2024 Korean Society of Surveying. All rights reserved.

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