Underwater photogrammetry for mapping, documenting, and preserving submerged heritage

  • From 25/06/2023 09:00 to 25/06/2023 13:00

Fabio Menna, Erica Nocerino 

Short description: Water covers two-thirds of the earth’s surface with an average depth of more than 3500 m and a maximum depth of almost 11000 m (the Mariana Trench), far greater than the highest peak of the world (the mount Everest with nearly 9000 m). In the depts of inland, coastal, and open waters are hidden vestiges of past societies, which have always been the subject of fascination and investigation. Underwater photogrammetry is one of the most flexible and widely employed techniques for detailed mapping and 3D modelling in archaeology and environmental studies. This tutorial aims at proving the participants with an introduction to the crucial aspects of underwater photogrammetry as 3D surveying technique and independent methods for the assessment of its accuracy potential. We will go through a brief history of underwater photogrammetry and its key developments, the optical fundamentals of underwater imaging, camera calibration approaches like implicit vs explicit modelling of refraction and their influence on the accuracy of the derived 3D photogrammetric products.