PSI - Issue 44

5

Dora Foti et al. / Procedia Structural Integrity 44 (2023) 1506–1513 D. F ti et al./ Structural Integrity Procedia 00 (2022) 0 0 – 000

1510

Fig. 4. Cameras’ locations, G.C.P. and dense cloud The dataset created consisting of 307 photographs, 213 from UAV and 97 from ground camera, was processed on Agisoft Metashape software. The celerimetric data were imported allowing the model to be scaled with an overall average error of 1.08 mm. (Figure 5).

Fig. 5. Workflow steps: (a) Sparse Cloud; (b) Dense Cloud; (c) Model monochrome; (d) Textured model. Subsequently, a DEM (Data Elevation Model) was drawn up, which allowed a check of the elevation of the artifact in relation to the riverbed (Figure 6). Architectural-structural modeling was done based on the dense cloud, this was exported from the photogrammetry software and imported into the Cad environment where, through a multiple section plane interrogation, it was possible to produce a two-dimensional geometric model essential for the study of structural parts and subsequently used for three-dimensional lowpoly modeling for FEM analysis.