Description
This mapping is the result of a collaboration with the Musée-Sousmarine, which allowed Lorient Agglomeration to model the Rade de Lorient accurately.
Christophe Cérino, Doctor and Research Engineer, Director of the Research House at the University of South Brittany is the permanent head of operation, responsible for the implementation of cartographic resources.
The measurements available can be compiled with those of ports and beaches and thus form an overall background.
Bathymetric data are used by technicians to calculate sediment accumulation and location in harbours or estimate the decline in sand levels on beaches.
The material used by the Underwater Museum also makes it possible to determine the nature of the seabed, which is complementary to our surveys.
Areas can be drawn precisely for fine expertise.
Sediment movements are important in the rade. This mapping is intended to be evolutionary.
Collection context
Olex software platform. Map system allowing the 2D and 3D generation of the relief of underwater backgrounds.
The Underwater Museum is equipped with differential equipment whose real-time accuracy is in the order of the meter and capable of simultaneously receiving the transmission of 14 satellites for optimal point positioning.
The work ladder consists of one square metre cells.
When the vessel navigates and passes within the geographical framework of a cell, the OLEX system checks the quality of the positioning information as well as that of the probe before recording the bathymetric coast, thus ensuring maximum reliability.
The more a maritime area is covered, the more comprehensive the mapping becomes.
Collection method
Star Arvor type 250 As (7.5 m — 230 hp)
- 1 Simrad ES60 Prospector
- 1 Simrad probe EA400
- 1 Combined Transducer 38/200 KHz
- 1 Sidescan 200 KHz Transducer
- 1 differential GPS (WAAS/EGNOS) Thales Mobile Mapper
- 1 differential GPS (WAAS/EGNOS) Furuno GP37 Pro
- 2 VHF
For more information, see the metadata on the Isogeo catalog.
Resources
| Name | Format | Description | Link |
|---|---|---|---|
| Image of the rade in 2012 | JPG | Open resource | |
| Rade 2012 black and white with relief in ecw format | Unknown | Open resource | |
| Bathy 2012 in XYZ format | ZIP | Open resource | |
| Rade 2008 in black and white relief in ecw format CC48Z7 | Unknown | Open resource | |
| Rade 2012 with relief and color in ecw format | Unknown | Open resource | |
| Embossed rade 2008 in ecw format CC48Z7 | Unknown | Open resource | |
| Image of the rade in 2008 | Unknown | Open resource |