Page 146 - Studia Universitatis Hereditati, vol 13(2) (2025)

146 Figure 7: Osor, Old Port – Ar-

chaeological Excavation in Sec-
studia universitatis hereditati, letnik 13 (2025), številka 2 / volume 13 (2025), number 2
tor 3 (photo: Jerko Macura,
2023)
deepened to a depth of 4 m at regular intervals. orthophotographs were generated using dedi-
Given these conditions and the dredging, more cated software, while all resulting georeferenced
precise cultural layers could not be defined. datasets were integrated and overlaid in QGIS,
During the preparation of the documen- where the graphic documentation was also pro-
tation, multiple complementary methods were duced (Popović 2023).
employed using modern digital technologies. The greatest number of archaeological finds
The proposed route plan for the future water were discovered in sector 3, located just in front
supply pipeline, provided by the infrastructure of the canal but connected to Osor’s infrastruc-
works contractor, was integrated in a GIS en- ture (fig. 7). In this 320 m² area, over 200 ob-
vironment with airborne laser scanning data. jects were found that could be typologically and
These data also included seabed coverage (cour- stylistically defined and chronologically dated.
tesy of the Ludwig Boltzmann Institute, Vi- These included pottery and container from vari-
enna), enabling a more detailed understand- ous historical eras, ranging from the Hellenistic
ing of the seabed topography within the study period to the Venetian Republic and up to the
area. For photographic and graphic documenta- 19th century.
tion, the excavation area was subsequently sur- The pottery is divided into several catego-
veyed from the air using an unmanned aerial ve- ries: coarse prehistoric and Hellenistic ceram-
hicle (UAV). A total of 867 aerial photographs ics, fine Roman ceramics and amphorae, and a
and 24 reference points, whose spatial posi- small portion of glazed modern-era pottery pro-
tions were recorded using a total station, were duced in northern Italy. Other finds include Ro-
used to generate the model and orthophoto- man oil lamps, modern-era smoking pipes, and
graphs. Geodetic measurements of the refer- fragments of unidentified objects.
ence points were conducted using GNSS. The Quantitatively, the largest number of finds
same reference points used for georeferencing comprised amphorae and their parts, especially
the aerial model were also employed to reference stoppers, which were made on a wheel and in a
the models of underwater-recorded archaeologi- mould. These included, for example, necks of the
cal excavation trenches. The 3D model of the ar- Portorecanati/Unije type, bifid handles of Dres-
chaeological trenches was produced from 2,409 sel 2-4 type amphorae, globular ribbed bodies
photographs. Photogrammetric 3D models and of Late Roman 1 type amphorae, and fragments