Sea bed sediment 1:150 000

The product is a digital solution showing superficial sediments on the sea floor along coasts in mainland France.

Citation proposal
Shom (2016) . Sea bed sediment 1:150 000. https://services.data.shom.fr:/geonetwork/srv/api/records/HOM_GEOL_NATURES_FOND_150.xml

Simple

Date ( Publication ): 2016-04-26

Identifier: http://www.shom.fr/HOM/GEOL_NATURES_FOND_150

Author

Shom

13 rue du Chatellier - CS 92803

BREST

29228

France

Maintenance and update frequency: As needed

Maintenance note: Le produit "Natures de fond au 150 000" est une synthèse de la connaissance. Il a vocation a faire l’objet d’éditions lorsque de nouveaux levés mettent en évidence une évolution des fonds ou une amélioration de la connaissance.

Keywords ( Theme )

sediment
sea bed sediment
Product
open data

GEMET - INSPIRE themes, version 1.0 ( Theme )

Sea regions

High-value dataset categories

Observation de la terre et environnement

Use limitation: Data free of use by acknowledging its source. Open licence Etalab v. 2.0 avril 2017.

Use limitation: Product not certified for navigation

Use limitation: Data free of use by acknowledging its source. Open licence Etalab v. 2.0 avril 2017.

Access constraints: License

Use constraints: Other restrictions

Other constraints: Open licence Etalab v. 2.0 avril 2017.

Access constraints: Other restrictions

Other constraints: Pas de restriction d'accès public. No public access restrictions.

Classification: Unclassified

Spatial representation type: Vector

Denominator: 150000

Metadata language: fre French

Character set: utf8 UTF8

Topic category

Oceans

Supplemental Information

The characteristics of the surfaces included in the "Sea floor map, 1:150,000" are described in the fields called attributes, as follows:

- TYPEVALUE: Code name for the type of sea floor as per the Shom classification. The following table describes the meanings and possible values of TYPEVALE attributes:

NFC: conglomerate: sediments in which 50 -100% of the particles are larger than 20 mm.

NFCG: conglomerate and gravel: sediments with a conglomerate matrix and 15 - 50% gravel.

NFGC: gravel and conglomerate: sediments with a gravel matrix and 15 - 50% conglomerate.

NFCV: muddy conglomerate.

NFG: gravel: sediments of which 50 -100% of the particles are between 20 and 2 mm. NFGS: sandy gravel: sediments with a gravel matrix and 15 - 50% sand.

NFSG: gravelly sand: sediments with a sand matrix and 15 - 50% gravel.

NFGV: muddy gravel.

NFS: sand: sediments in which 50 -100% of the particles are between 2 and 0.5 mm.

NFSF: fine sand: sediments in which 50 -100% of the particles are between 0.5 and 0.05 mm.

NFSV: muddy sand: sand in which between 5 and 20% of the particles are smaller than 0.05 mm.

NFSFV: muddy fine sand: fine sand in which between 5 and 20% of the particles are smaller than 0.05 mm.

NFVS: sandy mud: sand in which between 20 and 50% of the particles are smaller than 0.05 mm.

NFV: mud: sediments in which 50 -100% of the particles are smaller than 0.05 mm.

NFRock: rocks: rocks.

NFSi: silts.

NFASi: silty clay.

NFSiA: clay silts.

NFSSi: sands and silts.

NFSFSi: fine sands and silts.

NFM: Marl.

Distribution format

SHP
(
inapplicable
)
GML
(
3.2
)

Distributor

Shom

OnLine resource

Shom Geoportal

OnLine resource: NATURES_FOND_150_BDD_4326_WMSV
Access point

OnLine resource: NATURES_FOND_150_BDD_4326_WFS:ndf_150_2016_3857
Access point wfs

OnLine resource: Download service

OnLine resource

Shom marketplace to download data

Hierarchy level: Dataset

Conformance result

Date ( Publication ): 2010-11-23

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

Pass: true

Conformance result

Date ( Publication ): 2013-12-10

Explanation: Information sur la conformité de la ressource à une spécification (INSPIRE).

Pass: true

Statement: The product was prepared using the sediment data listed, converted and integrated in the Shom Sediment Database (BDSS). The solution provides a summary of data from the surveys completed in various eras using a range of systems: lead plummet with tallow acquired by the hydrography service (1820 - 1950); particle size analysis of sediment samples obtained by dredging, using a container, coring and bore holes (since 1890); MBES (MultiBeam EchoSounder) acoustic imaging and side sonar (since 1985); classification of seabeds by processing the acoustic signal from the single beam echosounder (since 1992); seismic reflection (since 1975); morphological analysis based on bathymetric data (since 1820). The surveys were carried out by Shom, BRGM (French Geological Survey), IFREMER, the universities of Lille 1, Rouen, Caen, Brest, La Rochelle, Bordeaux I and Corte, IntechMer, the Biological Station of Roscoff, the Conseil Général (Departmental Council) of Charente-Maritime, the Departmental Division of Equipment of Charente-Maritime, the Environment Office of Corsica, and the Independent ports of Bordeaux and Marseille. Shom oversaw the compilation of works.