Lots de qualités homogènes (au sens OHI) constitués de levés réalisés par le SHOM. MIGRATION: NON RENSEIGNE

Lots de qualités homogènes (au sens OHI) constitués de levés réalisés par le SHOM. La Manche - Cote Nord de France - Port de Cherbourg. Leve bathymetrique.

Lots de qualités homogènes (au sens OHI) constitués de levés réalisés par le SHOM. Travaux hydrographiques dans le golfe du morbihan - abords de la pointe St Jacques

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

Lots de qualités homogènes (au sens OHI) constitués de levés réalisés par le SHOM. Leve bathymetrique de l'appontement petrolier du Lazaret a ST-Mandrier. Recherches.

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

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.

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

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.