Photogrammetry (SfM) vs Terrestrial Laser Scanning (TLS) for archaeological excavations: mosaic of Cantillana (Spain) as a case study
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Author/sMarín-Buzón, Carmen; Pérez Romero, Antonio Miguel; León-Bonillo, Manuel J.; Martínez-Álvarez, Rubén; Mejías-García, Juan Carlos; [et al.]
The discovery of a Roman mosaic from the 2nd century AD in Cantillana (Seville) generated interest and the need for exhaustive documentation, so that it could be recreated with real measurements in a 3D model, not only to obtain an exact replica, but with the intention of analyzing and studying the behavior of two main geomatics techniques. Thus, the objective of this study was the comparative analysis of both techniques: near object photogrammetry by SfM and terrestrial laser scanner or TLS. The aim of this comparison was to assess the use of both techniques in archaeological excavations. Special attention was paid to the accuracy and precision of measurements and models, especially in altimetry. Mosaics are frequently relocated from their original location to be exhibited in museums or for restoration work, after which they are returned to their original place. Therefore, the altimetric situation is of special relevance. To analyze the accuracy and errors of each technique, a total s...