3D MODEL OF THE BREMEN "COG" – WHEN SCIENCE MEETS PUBLIC

The Bremen Cog represents one of the founding stone of the German Maritime Museum. The medieval vessel was discovered in 1962 in the River Weser. Since 2000 the ship is on display after: 3 years of excavation, nearly 10 years of documentation and reconstruction, followed by 20 years of conservation.
Although the conservation treatments are completed, it is absolutely necessary to lead further monitoring measurements in order to control regularly the state of the ship. The monitoring must include the environment control in the room, standards in Preventive Conservation (Temperature, Relative Humidity and Light), but also deformation processes. The environmental measurements are already on-going, but the deformation of the wood on the other hand was monitored only occasionally. A systematic and multi-yearly monitoring is currently under active consideration.
A three dimensional monitoring of the Ship would allow the museum's conservator to keep an eye on the ship and wood deformation that occurred in the past and the possible ones to come.
Nevertheless, a closer look at the examples in other museums was necessary, moreover listing the resources used (Equipment, finances and manpower).
A "test phase" was set on maximum 2 years' time comparing 3 methods in order to lead to a long-term solution. The comparison is focusing on the technical issues as well as interpretation possibilities of the data and the costs.

• Total Station (device owned by the museum)
• Terrestrial Laser Scanner, Structured Light Scanner (i3mainz)
• SFM Photogrammetry (camera owned by the museum)

COSCH WG meeting in St. Etienne 27 March 2015: presentation

COSCH WG meeting in Neuchâtel 13 October 2015: presentation

Project is led by

Amandine Colson, M.A. Conservator of Archaeological objects, German Maritime Museum, Bremerhaven Germany.

Collaborators:

• Prof. Dr.-Ing. Frank Boochs, i3mainz - Institute for Spatial Information and Surveying Technology, Mainz University of Applied Sciences, Germany
• Julien Guery, Geoarcheologist and Specialist of Photogrammetry
• Massimiliano Ditta, Maritime Archaeologists, Specialist in 3D Documentation (Photogrammetry and Total Station)
• Dr Zoltan Kato, Head of the Research Group on Visual Computation, University of Szeged, Institute of Informatics, Hungary
• Dr Levente Tamas, Researcher at the University of Szeged, Institute of Informatics, Hungary
• Dr Stefanie Wefers, i3mainz - Institute for Spatial Information and Surveying Technology, Mainz University of Applied Sciences, Germany