| Title |
A Study on Analysis of Influencing Parameters and Advancement Strategy for Precision Enhancement in Drone-based Structural Verification Measurements |
| Authors |
Heedam Jeong ; Minjae Lee ; Sukjoon Han ; Jehoon Lee ; Ducksun Park |
| DOI |
https://dx.doi.org/10.6106/KJCEM.2025.26.6.018 |
| Keywords |
Unmanned Aerial Vehicle (Drone); Structural Surveying; Image Acquisition; Ground Control Points (GCP); Measurement Accuracy |
| Abstract |
The application of drone technology in structural verification measurements is rapidly expanding in civil engineering practices. However, comprehensive analysis of parameters affecting measurement precision, such as drone specifications, flight altitude, and Ground Control Point (GCP) configurations, requires further investigation. This study systematically analyzes these parameters through field measurements conducted on three bridge structures at highway construction sites. The experimental program evaluated four drone types with varying RTK capabilities, two distinct flight altitudes, and four GCP geometric configurations. Results demonstrated that the Matrice 300 RTK achieved optimal precision with a root mean square error (RMSE) of 1.2cm, while measurements at 10m altitude showed 44% improved precision compared to 20m altitude. Grid-pattern GCPs exhibited superior performance with an RMSE of 1.45cm, showing 30% improvement over triangular patterns. These results establish practical guidelines for precision enhancement in drone-based structural verification measurements. |