Lots de qualités homogènes (au sens OHI) constitués de levés réalisés par le SHOM. Leve bathymetrique et topographique

Lots de qualités homogènes (au sens OHI) constitués de levés réalisés par le SHOM. Levé bathymétrique

Lots de qualités homogènes (au sens OHI) constitués de levés réalisés par le SHOM. Leve effectue par la BOM dans le cadre de l'etude de projet CETACE.

Lots de qualités homogènes (au sens OHI) constitués de levés réalisés par le SHOM. Bathymétrie au sondeur monofaisceau atlas DESO20 par la coralline Aisha.

Bathymetric datasets, collected between 1970 and 1990, are mainly acquired with single-beam echosounders. Quality controls and qualification, conducted by the Shom, on these datasets are not exhaustive. Datasets may present significant uncertainties and errors may remain.

Bathymetric datasets, collected between 1990 and 2005, are digital data controlled and qualified. They are acquired with single-beam echosounders and the first generations of multi-beam echosounders.

Bathymetric datasets, collected before 1970, are historical surveys acquired with leadlines (and single-beam echosounders after 1930-1940). Quality controls and qualification, conducted by the Shom, on these datasets are not exhaustive. Datasets may present significant uncertainties and errors may remain.

Bathymetric datasets, collected after 2005, are controlled and qualified. They are mainly acquired with multi-beam echosounders.

Bathymetric datasets are an extraction of surveys belonging to the Shom public database. For depth up to 50m, the vertical precision of soundings varies from 30cm to 1m and the horizontal precision varies from 1 to 20m. In deep ocean, the vertical precision is mainly around 1 or 2% of the bottom depth. It is sometimes more, it depends on the technology used. The data are referenced to ZH which is assimilated to LAT. Data are corrected for sound velocity variations.

Bathymetric datasets are an extraction of surveys belonging to the Shom public database. For depth up to 50m, the vertical precision of soundings varies from 30cm to 1m and the horizontal precision varies from 1 to 20m. In deep ocean, the vertical precision is mainly around 1 or 2% of the bottom depth. It is sometimes more, it depends on the technology used. The data are referenced to ZH which is assimilated to LAT. Data are corrected for sound velocity variations.