Bathymetry - Indian Ocean, value added transit of the R/V Marion Dufresne (synthesis, 2025)

Bathymetry in the South West Indian Ocean, with a 1/8 arcminute grid spacing. This dataset consists of a bathymetric Digital Terrain Model (DTM), derived from the multibeam echosounder (12kHz) data of the R/V Marion Dufresne (SeaFalcon11 then EM122). The data acquisition is carried out in an opportunity mode during the ship's transit. Vertical reference: Observed sea level. Reference of oceanographic surveys data that contribute to the DTM :

• VIVIER Frédéric (2009) MD 174 / TRACK-2 cruise, RV Marion Dufresne, https://doi.org/10.17600/9200080
• MAZAUD Alain, MICHEL Elisabeth (2011) MD 185 / INDIEN SUD 1 cruise, RV Marion Dufresne, https://doi.org/10.17600/11200030
• MAZAUD Alain, MICHEL Elisabeth (2012) MD 189 / INDIEN SUD 2 cruise, RV Marion Dufresne, https://doi.org/10.17600/12200010
• SINGH Satish, HANANTO Nugroho Dwi (2017) MD 210 / MIRAGE 2 cruise, RV Marion Dufresne, https://doi.org/10.17600/17002900
• METZL Nicolas, LO MONACO Claire (2018) MD 211 / OBSAUSTRAL cruise, RV Marion Dufresne, https://doi.org/10.17600/18000490
• ROYER Jean-Yves (2018) MD 216 / MOUILLAGE OHA-SIS-BIO cruise, RV Marion Dufresne, https://doi.org/10.17600/18000653
• LO MONACO Claire (2019) MD 217 / OBSAUSTRAL cruise, RV Marion Dufresne, https://doi.org/10.17600/18000885
• CROSTA Xavier (2019) MD 218 / CROTALE cruise, RV Marion Dufresne, https://doi.org/10.17600/18000886
• ROYER Jean-Yves (2020) OHA-SIS-BIO-12 cruise, RV Marion Dufresne, https://doi.org/10.17600/18000691
• ROYER Jean-Yves (2021) OHA-SIS-BIO 2021 cruise, RV Marion Dufresne, https://doi.org/10.17600/18001239
• ROYER Jean-Yves (2022) MD236 / OHA-SIS-BIO 2022 cruise, RV Marion Dufresne, https://doi.org/10.17600/18001865
• ROYER Jean-Yves (2022) MD238 / OHA-SIS-BIO 2022 cruise, RV Marion Dufresne, https://doi.org/10.17600/18002903
• ROYER Jean-Yves (2023) OHA-SIS-BIO 2023 cruise, RV Marion Dufresne, https://doi.org/10.17600/18002425
• ROYER Jean-Yves, OLIVE Jean-Arthur (2024) OHA-GEODAMS 2024 cruise, RV Marion Dufresne, https://doi.org/10.17600/18003036
• MCLACHLAN Ian (2008) MD 170 / SWIR-2008 cruise, RV Marion Dufresne, https://doi.org/10.17600/8200070
• ROEST Walter, JOHNSON Sean (2010) MD176 Discovery Ridge-CrozetPlac cruise, RV Marion Dufresne, https://doi.org/10.17600/18001444
• MD 247