JNCC Acoustic Multibeam Echosounder Survey of Selected Sites off the North Coast of Anglesey as part of the Mapping European Seabed Habitats (MESH) Project (3rd Party Data)
During the summer of 2005, JNCC collaborated with partners of the HABMAP project to survey areas of potential Annex 1 habitat (primarily reef) in the Irish Sea. This was to support nature conservation initiatives beyond 12 nm North of Anglesey. This multibeam echosounder survey was carried out alongside single-beam data collection, seabed sampling and towed video imaging. Four areas of seabed covering approximately 140 sq km were surveyed and following data analysis, the area of study was broadly characterised by a complex topography and mixed sediment mosaics. The purpose of this data capture was to obtain MBES coverage of the study areas for further interpretation and analysis in conjunction with other data gathered in the area, for the purpose of identifying Annex 1 subtidal habitats. Confidence in data is high. Data depth corrected for tide using POLPRED software which utilises one or more of Proudman Oceanographic Laboratory's hydrodyamic models. CARIS HIPS / SIPS software used to create surfaces and gridded datasets by experienced surveyors.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- EXT_DS114969
- Alternative Title
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- Arolwg ecoseinydd amlbaladr acwstig o safleoedd penodol oddi ar arfordir gogledd Ynys Mon fel rhan o'r prosiect Mapio Cynefinoedd Gwelyau Mor Ewrop (MESH)
- Metadata Language
- English
- Lineage
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Multibeam echosounder data acquired using Kongsberg Simrad EM1002 hull mounted on the R/V Celtic voyager. Frequency 93kHz (outer +/- 20 degrees) and 98kHz (inner +/- 50 degree swath centered at Nadir) utilising MERLIN software package. Swath ideally kept at max of 68n degrees to cover approximately 4.7 times water depth. Line spacing approximately 200 m giving 15-20% overlap. Three sound velocity drops made during cruise to calibrate to water conditions. Dataset collected as part of a collaborative cruise with JNCC and the Irish Marine Institute, data for the HABMAP project collected during the same cruise.
- Dataset Reference Date (Publication)
- 2012-07-09
Extent
Extent
- Geographic Extent
- SIR YNYS MON - ISLE OF ANGLESEY
))
Vertical Extent
- Medin Extent Keyword
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benthic boundary layer
Vertical Extent
- Minimum value (metres)
- -30
- Maximum value (metres)
- -115
- Vertical CRS
Distribution
Distribution
- Format Type and Description
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Documents
()
- Specification
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[A] xyz data in .txt and .TAB format [B] CARIS HIPS raw data format [C] GeoTiff images
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Documents
()
- Resource Locator
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View Metadata
World Wide Web page
Quality
Data quality
- Quality Scope
- Dataset
- Lineage
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Multibeam echosounder data acquired using Kongsberg Simrad EM1002 hull mounted on the R/V Celtic voyager. Frequency 93kHz (outer +/- 20 degrees) and 98kHz (inner +/- 50 degree swath centered at Nadir) utilising MERLIN software package. Swath ideally kept at max of 68n degrees to cover approximately 4.7 times water depth. Line spacing approximately 200 m giving 15-20% overlap. Three sound velocity drops made during cruise to calibrate to water conditions. Dataset collected as part of a collaborative cruise with JNCC and the Irish Marine Institute, data for the HABMAP project collected during the same cruise.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
- NRW Thesaurus
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- multibeam
- Habitats and Species Directive
- sediments
- reef
- HABMAP
- MESH
- 3rd Party Data
- Third Party Data
- Type
- Theme
Citation
- Date (Publication)
- 2023-12-31
Keywords
- SeaDataNet Parameter Discovery Vocabulary
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- Acoustic backscatter in the water column
- Bathymetry and Elevation
- Type
- Theme
Citation
- Date (Revision)
- 2021-01-06
Spatial Reference System
Content
Content Information
NRW Profile
Custom Elements
- NRW Related Title
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Broad-scale biotope mapping of potential reefs in the Irish sea (north-west of Anglesey)
Constraints
Constraints
Limitations on Public Access and Use
- Restriction type
- Other restrictions
Access Constraints Directive
- Limitations
- no limitations
Access Constraints Text
- Other constraints
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This dataset is wholly owned by Joint Nature Conservancy Committee. NRW may provide access to this dataset on request in some circumstances. However, enquirers are advised to obtain a copy from the owner/originator directly, rather than NRW. NRW may NOT publish or disseminate it in its entirety.
Use Constraints
- Use constraints type
- Other restrictions
- Other constraints
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© JNCC 2008. NRW does NOT grant permission to third parties to re-use or disseminate this dataset. Those seeking such permission should approach the originator directly.
Metadata
Metadata
- File Identifier
- 4f4c4942-4343-5764-6473-313134393639 XML
- Metadata Language
- English
- Parent Identifier
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Multibeam Acoustic Data Index
NRW_DS121633
- Resource type
- Dataset
- Metadata Date
- 2024-05-30T15:37:19.757Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
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1.0