Bathymetric datasets before 1970

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.

Citation proposal
. Bathymetric datasets before 1970. https://services.data.shom.fr:/geonetwork/srv/api/records/LEVES_BATHY_AVANT_1970.xml

Simple

Date ( Revision ): 2023-12-13T00:00:00

Identifier: http://www.shom.fr/BATHYMETRIE/LEVES_BATHY_AVANT_1970

Presentation form: Digital map

Credit: ©Shom

Status: On going

Owner

Shom

13 rue du Chatellier

BREST

29200

France

Maintenance and update frequency: Not planned

Keywords ( Theme )

bathymetry
Open data
Product

Use limitation: Bathymetric Dataset are available under Open License (version 2.0 - April 2017), Etalab mission

Use limitation: Product not certified for navigation.

Use limitation: Open License (version 2.0 - April 2017), Etalab mission

Access constraints: License

Use constraints: Other restrictions

Other constraints: No public access restrictions

Classification: Unclassified

Spatial representation type: Vector

Distance: 99999 metre

Metadata language: French

Character set: UTF8

Topic category

Elevation

Begin date: 1816-01-01T00:00:00

End date: 1969-12-31T23:59:59

Reference system identifier

EPSG

WGS 84 (EPSG:4326)

7.9

Distribution format

XYZ ASCII
(
1.0
)

Distributor

Shom

OnLine resource: Shom geoportal

OnLine resource

LEVES_BATHY_AVANT_1970_WMSV

Bathymetric datasets before 1970

OnLine resource: Shom marketplace

Hierarchy level: Series

Conformance result

Date ( Publication ): 2013-10-21

Explanation: Information sur la conformité au règlement d'interopérabilité des séries et des services de données géographiques.

Pass: false

Statement: Bathymetric datasets, collected before 1970, are historical surveys acquired with leadlines (and single-beam echosounders after 1930-1940). Bathymetric datasets are an extraction of surveys belonging to the Shom public database. They go through a quality control before integration. Quality controls and qualification, conducted by the Shom, on these datasets are not exhaustive. Datasets may present significant uncertainties and errors may remain.