Data were processed with Ifremer software "Caraïbes".

The data processing is described in 2 Ifremer reports:

  • Synthèse bathymétrique sur la ride médio-atlantique : M. Delobel (rapport n° DRO/GM/95-02)
  • Synthèse de données bathymétriques. Cas de la dorsale médio-atlantique : B. Loubrieu (rapport n° DRO/GM/96-32)


Main steps of bathymetric data processing :

  • EM12D data validation,
  • EM12D data (cruises Sigma, Dormassis and Faranaut) at grid spacing 125 m,
  • Sea-beam data valisation:
    • Data positioning correction (crossing sections with EM12D data are used),
    • Correction of the sound velocity whith Levitus tables,
  • Sea-beam data gridding (grid spacing 250 m),
  • EM12D data of Seadma cruise gridding (grid spacing 500 m),
  • Merging all DTM (digital terrain model) at grid spacing 500 m.