Centimetre-range deformations of built environment revealed by drone-based photogrammetry
| Autor: | Sander Varbla, Artu Ellmann, Raido Puust |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Ground truth
Levelling 0211 other engineering and technologies 020101 civil engineering 02 engineering and technology Building and Construction Deformation (meteorology) Residual Drone 0201 civil engineering Deformation monitoring Photogrammetry Control and Systems Engineering 021105 building & construction Range (statistics) Geology Civil and Structural Engineering Remote sensing |
| Zdroj: | Automation in Construction. 128:103787 |
| ISSN: | 0926-5805 |
| DOI: | 10.1016/j.autcon.2021.103787 |
| Popis: | Deformation monitoring is an important component of the construction process and maintenance. Conventional point-wise surveying methods, however, tend to be time consuming, labour-intensive and may pose a risk to the surveyors. Instead, unmanned aerial vehicles in combination with structure-from-motion photogrammetry are now capable of high-accuracy contactless surveys. This study hence investigates road structure deformations identifiable by drone surveys from 40, 50 and 60 m flight altitudes. The surveys were georeferenced in 21 different ground control point configurations using integrated georeferencing. Comparisons between the resulting models and terrestrial laser scanning ground truth yielded the optimal configurations. The determined deformation estimates by using the optimal georeferencing configurations were validated using high-precise levelling results, which yielded the best deformation residual RMSE estimate of 0.29 cm for the 50 m altitude survey. These tests demonstrated that the proposed method can be employed for quick and contactless quantification of magnitude of built environment deformations. |
| Databáze: | OpenAIRE |
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