3D reconstruction of a shallow archaeological site from high-resolution acoustic imagery - a case study
Plets, R.M.K.; Dix, J.K.; Adams, J.R.; Bull, J.M.; Henstock, T.; Gutowski, M.; Best, A.I. (2006). 3D reconstruction of a shallow archaeological site from high-resolution acoustic imagery - a case study, in: Jesus, S.M. et al. Proceedings of the Eight European Conference on Underwater Acoustics - 8th ECUA, 12-15 June 2006, Carvoeiro, Portugal. pp. 1-6 In: Jesus, S.M.; Rodriguez, O.C. (Ed.) (2006). Proceedings of the Eight European Conference on Underwater Acoustics - 8th ECUA, 12-15 June 2006, Carvoeiro, Portugal. ECUA: [s.l.]. , more |
| Available in | Authors | | Document type: Conference paper
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| Authors | | Top | - Plets, R.M.K., more
- Dix, J.K.
- Adams, J.R.
- Bull, J.M.
| - Henstock, T.
- Gutowski, M.
- Best, A.I.
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| Abstract | This paper compares a 2D and 3D-Chirp geophysical investigation of a buried shipwreck: the Grace Dieu (1418). The site, covered by 2-5m of water, is buried within muddy inter-tidal sediments. At exceptionally low tides, a few of the marginal timbers are exposed. The marine survey utilised a 2D-Chirp systems with a DGPS navigational system, and a 3-Chirp system with RTK-positioning capability. In both cases, the source was towed over the site by divers. Close survey line spacing, accurate navigation and decimeter scale resolution data enabled the construction of a pseudo- and full 3D-image of the site, which were calibrated against an RTK-GPS-terrestrial survey. The exercise demonstrated the improved spatial resolution provided by the 3D-Chirp system and the ability of a well constrained 2D survey to produce a pseudo-3D reconstruction of the gross ship structure. |
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