Worldwide seabed sediment map - pack

The “World Seabed Sediment Map” product contains geo-referenced digital data, describing the nature of the sediment encountered in different seas and oceans of the world. The objects are all surface areas and the description of an object includes in particular the nature of the sediment including rock-type bottoms.

Citation proposal
Shom (2021) . Worldwide seabed sediment map - pack. https://services.data.shom.fr:/geonetwork/srv/api/records/HOM_GEOL_SEDIM_MONDIALE_PACK.xml

Simple

Date ( Publication ): 2021-05-06

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

Author

Shom

13 rue du Chatellier

BREST

29200

France

Keywords ( Theme )

sedimentology
marine sediment
seabed map

GEMET - INSPIRE themes, version 1.0 ( Theme )

Sea regions

Use limitation: Public license Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)

Use limitation: Do not use for navigation

Use limitation: Public license Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)

Access constraints: License

Use constraints: Other restrictions

Other constraints: Public license Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)

Access constraints: Other restrictions

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

Classification: Unclassified

Spatial representation type: Vector

Denominator: 500000

Metadata language: fre French

Character set: utf8 UTF8

Topic category

Oceans

Supplemental Information

* Sediment: An assembly of coarse or fine clastic or biogenic particles transported by one or several means.

* Conglomerate: Sediments in which 50 -100% of the particles are larger than 20 mm.

* Gravel conglomerate: Sediments with a conglomerate matrix and 15 - 50% gravel.

* Gravel: Sediments in which 50 -100% of the particles are between 20 and 2 mm.

* Gravelly sand: A sand matrix comprising 15 - 50% gravel.

* Sand: Sediments in which 50 -100% of the particles are between 2 and 0.5 mm.

* Muddy sand: Sand in which between 5 and 20% of the particles are smaller than 0.05 mm.

* Fine sand: Sediments in which 50 -100% of the particles are between 0.5 and 0.05 mm.

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

* Silt: Sediments composed of 50 to 100% detrital or biogenic particles between 0.01 and 0.05mm.

* Clay: Sediments composed of 50 to 100% detrital or biogenic particles finer than 0.01mm.

* Mud: Sediments in which 20 -100% of the particles are smaller than 0.05 mm.

Distribution format

SHP
(
inapplicable
)
GML
(
3.2
)

Distributor

Shom

OnLine resource

Shom Geoportal

OnLine resource: SEDIM_MONDIALE_BDD_4326_WMSV
Access point

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 information used for the development of this product is based on the nature map of the ocean floor published by UNESCO in 1972 and digitized by the Shom in 1995. The purpose of this initial rather coarse map was to provide basic information on to the nature of the seabed and mainly concerned the deep sea. It was gradually improved by the Shom which incorporated more precise maps produced by the Shom, digitized sedimentary maps or summary documents published by various organizations. These maps were previously edited and put into the format of the classification of the nature of the sediments established by the Shom. This version of the world map includes the maps listed in appendix 7.3. These maps were only integrated into the world map when the following conditions were met: - their quality and the interest of their content authorized their integration and validation in the Shom Sedimentological Database (BDSS); - their scale is less than or equal to 1 / 100,000. The product was developed from sedimentary maps identified, digitized and integrated into the BDSS from 1992 to 2020. Some of these maps are synthesis of maps which are themselves derived from the synthesis of very diverse sedimentary data. Many of these compilations were produced by the Shom. The compilation of all these maps in a single document required redefinitions of the overlap zones which were carried out from the data of the morphology and the knowledge of the regional sedimentology (bibliographic and cartographic data).