note: This paper in under construction as well as the 3D
elaboration ... Recently discovered in the Bay off
Saint-Gervais (Fos-sur-Mer, France), by 4 or 5 m deep, a portion of
antique shipwreck, located at a few hundred meters away from the
shore, has just been investigated by Luc Long and his team
One of the 1845 photogrphs shooted on site.
The group of well preserved remains, including 7 ribs and several
planks of the hull and belongs to the high parts of a large-sized
roman ship. The position of the ribs and their morphological
characteristics looks like an extremity of the ship, after the lower
part of the ship, where are begining the « allonges » of the ribs.
The important turbidity of water is well visible on this large scale photograph.
The archaeological artefacts mixed around these vestiges of wood, are
chronologically divided between the first century BC and the Vth
century AD. Thanks to the detailed study of this little portion of
ship, the following objective consisted to clarify if these vestiges
belong to one of the antique remains located in this large area
(ship-wrecks Saint-Gervais 1-4).
on board by Luc Long.
The results of xylologic analysis (C14 and dendrochronology) and
photogrammétric shots operated by Olivier Bianchimani and Solène
Basthard-Bogain (Septentrion Environment) and restituted by Pierre
Drap (LSIS-CNRS), will bring us very important informations. The
restitution starts in August 2013, the first result after orientation
and scale of 1185 photographs, made with a Nikon D700 inside a
housing from Nauticam. Light is managed by two strobe Ikelite.
First 3D elaboration, scaled by 2 calibrated rules
Orientation of all the photographs, here only the points computed for
the orientation are visible. The next step is densifying and meshing,
then we will have to choose the way to exploit these data in order to
produce a document relevant for the archaeologist. This
remains the main problem ...