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When archaeologists make a carefully measured drawing, it is called a site plan. If archaeologists piece together the video or pictures from a shipwreck site, they create a photomosaic. Photomosaics are very useful in studying shipwreck sites, because archaeologists can see exactly what the wreck looks like on the bottom of the ocean or lake.
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Oct 26, 2020 · Within maritime archaeology, the application of photogrammetric techniques to the study of shipwrecks dates back to the beginnings of the field, with George Bass’s pioneering work. However, due to the operational costs and the technical knowledge required, its use remained relatively limited for several decades.
- nciarlo@conicet.gov.ar
Dec 8, 2023 · This paper reviews the trends, topics, and research directions in shipwreck archaeology over the past decade. As archaeology increasingly embraces advances in technological methods that can aid our research, the so-called ‘digital turn’, it behoves maritime archaeologists, and archaeologists more broadly, to consider how collaborative ...
- Photography
- Control Network
- Multi-Image Photogrammetry
- Video Footage
- Orthophotos
- Data Collection and Storage
- Two-Dimensional Mapping
- Profile Sections
- Line Drawings
- Artifact Catalogues
The first step to create accurate tridimensional models from multi-image photogrammetry is to take good photos. Choosing the right camera and accessory equipment is essential to ensure the capture of clear and properly colored images. Although there is a range of acceptable solutions from which archaeologists can choose, the best results depend hea...
Tying the site plan to a solid network of coordinates is a key factor of this workflow, both to correct the scale and distortion of the photogrammetry models and to establish a contextual relationship for the archaeological remains. One of the advantages of PhotoScan®is that it does not require precalibration of the camera. Although calibration may...
Both in the Lagoa do Peixe and Gnalić sites, the tridimensional models were developed using Agisoft PhotoScan professional edition ®. There are four basic required tasks in this software to enter and process the images: “align photos,” “create dense cloud,” “build mesh,” and “build texture.” The software makes these tasks easy and clear, but the re...
At Gnalić, the authors also tested multi-image photogrammetry from video footage with good results. Still frames were extracted from the video using Adobe Premiere Pro CS6before processing. One of the main advantages of this technique is that the acquisition process is faster and can be automated and performed by ROVs or AUVs, being a method of cho...
Orthophotos can be easily obtained with PhotoScan®in any projection required. An orthophoto is a high-quality two-dimensional image extracted from the model, based on orthogonal projection of a given angle in the model. Orthophotos can be accurately scaled and related, for instance with orthogonal sections at given intervals. Depending on the chose...
The organization of stored archaeological information is paramount for future study. Data should be freely shared and publicly available for the most part, and the tasks indicated in Fig. 1as “Data collection” and “Databases” are essential for the success of any project. The authors believe that there is no such thing as an objective recording of a...
Publications are still predominantly based on two-dimensional representations of reality, and orthophotos are useful to draw site plans and sections. Tracing can be achieved by hand—a process that may take longer but forces the archaeologist to analyze and understand every line traced—or using more expedited processes, such as off-the-shelf softwar...
Sections can be extracted from the tridimensional model and processed for drafting. The authors used Autodesk Maya ® because this software provides precise camera settings and controls. Cameras in this software allow us to see predefined slices of the mesh, and 1- to 10-cm-thick sections can be easily obtained using the “Near Clip Plane” and “Far C...
The reconstruction of the shape of a hull from archaeological remains is always an educated guess, achieved by reconstructing its basic curves (longitudinal and transversal) from the shapes preserved in surviving timbers (Steffy 1982, 1989b; Castro and Fonseca 2006; Evangelista 2011). Even when attempted with specialized software, most reconstructi...
Artifact catalogues are generally organized from artifact databases, and there is a long tradition in the use of digital artifact databases. Most countries have a national format, which contains space for the conservation and curation processes. In this paper, we focus on the other major database: the ship timber catalogs.
- K. Yamafune, R. Torres, F. Castro
- 2017
Maritime archaeology, the study of the material remains of human activities on the seas and interconnected waterways (after Muckelroy 1978: 4), is fundamentally focused on shipwrecks. Although the definition encompasses many other types of context such as harbours, submerged land surfaces and coastal settlements, shipwrecks are the most.
ve methods for documenting, collecting, and processing cultural heritage. This paper aims to study underwater photogrammetr. by examining articles and interactive platforms related to this subject. Specifically, it focuses on the case study of the Mazotos shipwreck in order to identify the ways archaeologists.
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Apr 15, 2021 · Interpreting Shipwrecks: maritime archaeological approaches Thijs J. Maarleveld University of Southern Denmark, Esbjerg, Pages 457-459
