EMODnet product catalogue
ANNEX I habitat for Bassurelle Sandbank Site of Community Importance (SCI)
An ArcGIS polygon shapefile of the potential extent of Annex I sandbank habitat identified at Bassurelle Sandbank SCI was created using the data collected and processed as described below.
EUNIS class assignments from the particle size data were used in conjunction with the interpreted still images to inform the semi-automated process of map production using object-based image analysis (OBIA), implemented in the software package eCognition v8.8.1. The OBIA was used to map habitats. It was not possible to use this technique for the mapping of Annex I habitats (specifically the sandbank feature at Bassurelle Sandbank SCI). Instead, an expert driven process of slope analysis in ArcGIS 9.3.1 and 3D visual interpretation using the Fledermaus v7 software package was used to identify the potential extent of the bank feature.
Simple
- Alternate title
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GB001327
- Date (Creation)
- 2014-01-28
- Date (Publication)
- 2018-04-25
- Citation identifier
- EMODnetSeabedHabitats / GB001327
- Point of contact
-
Organisation name Individual name Electronic mail address Role JNCC
Owner
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GEMET - INSPIRE themes, version 1.0
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-
Habitats and biotopes
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http://inspire.ec.europa.eu/codelist/ReferenceHabitatTypeSchemeValue
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Habitats directive
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- Use limitation
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┬® JNCC. Data may be re-used under the terms of the Open Government Licence v3.
- Use limitation
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geossAttribution
- Access constraints
- Other restrictions
- Other constraints
-
no limitation
- Spatial representation type
- Vector
- Denominator
- 100000
- Language
- English
- Topic category
-
- Environment
- Oceans
))
- Begin date
- 2013-03-18
- End date
- 2013-04-01
- Supplemental Information
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Barrio Froján, C., Jenkins, C. & McIlwaine, P. 2017. CEND 03/13: Offshore seabed survey
of Bassurelle Sandbank cSAC/SCI. JNCC/Cefas Partnership Report Series No. 15.
JNCC, Peterborough.
- Reference system identifier
- EPSG / WGS 84 (EPSG:4326) / 7.9
- Topology level
- Geometry only
- Distribution format
-
Name Version ESRI Shapefile
1.0
- OnLine resource
-
Protocol Linkage Name OGC:WMS
https://ows.emodnet-seabedhabitats.eu/geoserver/emodnet_view_maplibrary/wms? gb001327
OGC:WFS
https://ows.emodnet-seabedhabitats.eu/geoserver/emodnet_open_maplibrary/wfs? gb001327
WWW:LINK-1.0-http--link
https://files.emodnet-seabedhabitats.eu/data/EMODnetSBHsurvey_GB001327.zip EMODnet Seabed Habitats download
- Hierarchy level
- Dataset
Conformance result
- Title
-
Corrigendum to INSPIRE Metadata Regulation published in the Official Journal of the European Union, L 328, page 83
- Date (Publication)
- 2009-12-15
- Explanation
-
See the referenced specification
- Pass
- Yes
Conformance result
- Title
-
Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services
- Date (Publication)
- 2010-12-08
- Explanation
-
See the referenced specification
- Pass
- Yes
- Statement
-
2.2.1 Sidescan sonar
An Edgetech FS-4200 dual frequency (300/600 kHz) sidescan sonar was used in combination with the Edgetech Discovery software for data recording. Data were recorded in XTF format. The position of the sidescan was calculated using a layback calculation using the shipÔÇÖs position as reference.
2.2.2 Multibeam echosounder
Multibeam bathymetry and backscatter data were acquired using the Kongsberg EM2040 system operated at 200 kHz and deployed on the drop keel of RV Cefas Endeavour. Variations of sound velocity with water depth were determined using a CTD (conductivity-temperature-depth) probe with a sound velocity profile (SVP) measurement taken at least once every 24h; SVP data acquired were applied during multibeam data acquisition.
2.3 Benthic sample and seabed imagery acquisition
Ground-truthing stations were sampled using a HamCam (a mini Hamon grab fitted with an underwater video camera) and a towed sledge fitted with a digital underwater video camera capable of taking still photographs. A Jennings 2 m scientific beam trawl was also deployed at selected locations to collect qualitative information on the epifaunal assemblage.
On recovery of the HamCam at each station, the sediment sample was decanted into a suitable container. The whole sample was photographed and the volume measured and recorded. A representative sub-sample of sediment (c. 0.5 litres) was taken for particle size analysis (PSA). The remaining sample was sieved over a 5 mm and 1 mm mesh sieve. Photographs were taken of the material retained on both sieves (see Whomersley, 2013). The retained fractions were combined in a suitable container before being fixed with buffered 4% formalin solution.
The camera sledge system comprised of a video camera, laser-scaling device, underwater lights and a flash unit. During deployment, a note was made of the length of tow cable paid out to allow an estimate to be made of the distance of the sledge behind the vessel. USBL positioning was also used to log the position of the camera sledge on the seabed during each deployment. Video tows lasted c. 10 minutes, with a still photograph taken at approximately one minute intervals, or opportunistically if a feature of interest was observed.
Where deployed, the Jennings 2 m beam trawl was towed at c. 1.5 knots for c. 5 minutes. On recovery, the catch was placed over a 5 mm mesh sieve and all retained taxa were identified, enumerated and weighed.
Metadata
- File identifier
- 288a4373-c0f4-43b9-8a51-d6a7e2ba5c86 XML
- Metadata language
- English
- Character set
- MD_CharacterSetCode_utf8
- Hierarchy level
- Dataset
- Date stamp
- 2021-12-09T16:40:43
- Metadata standard name
-
ISO19115
- Metadata standard version
-
2003/Cor.1:2006
- Metadata author
-
Organisation name Individual name Electronic mail address Role JNCC
Point of contact
)))
