Across Wales Drop-Down Video Monitoring: Additional North Llyn Ground Truthing (2012)
Drop down video ground-truthing of additional Modiolus bed discovered partially outside the Special Area of Conservation (SAC). This follows on from previous ground-truthing carried out in 2011 (project 313). Analysis and Marine Recorder entry to be undertaken later in the year under Data Capture call-off contract. The purpose of this data capture was to conduct a ground truthing exercise through which the extent and quality of Modiolus mussel beds could be assessed in an area of the coast of the Llyn Peninsula, North Wales.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS115525
- Alternative Title
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- 2012 CCW Towed Video Survey of North Llyn Modiolus (Additional Area) MRCCW3170000000A
- 2012 DDV ground truthing of Additional Modiolus Bed off North Llyn
- Gwaith monitro fideo tanddwr ledled Cymru 2012: Tystiolaeth ychwanegol ar gyfer Gogledd Llŷn
- Metadata Language
- English
- Lineage
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This follows on from previous ground-truthing carried out in 2011 (project 313): Across Wales drop-down video monitoring, 2012: North Llyn ground truthing. Drop-down video is useful for gathering large volumes of data across wide areas of seabed and often to depths beyond which diver observations can be safely made. Detailed methods and site location are described in CCW Marine Monitoring report 24a. Amendments to the previous methods include the addition of a HD video camera system manufactured by C-Technics in place of the SD camera previously used. A Cannon EOS 400D digital SLR was also used in a housing manufactured by Rovtech systems. Photographic stills were taken every 11 seconds along the tows to assist with species and habitat validation. GIS vessel tracks exported from Boat GPS. GIS Start and end points and field notes also supplied.
- Dataset Reference Date (Publication)
- 2012-06-26
Temporal Extent
- Begin date
- 2012-06-25
- End date
- 2012-06-26
- Topic category
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- Biota
Extent
Extent
- Geographic Extent
- GWYNEDD - GWYNEDD
))
Vertical Extent
- Medin Extent Keyword
- benthic boundary layer
Distribution
- Format Type and Description
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Database
()
- Specification
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[A] Video files Streamed direct from camera in .asf format [B] Still images take direct from the sledge camera in jps format [C] Spreadsheet data (field notes - Start and Stop lat/longs and times from the video and field notes about the video taken opn board the boat [D] GIS data in MapInfo .tab file format (start and end points and vessel tracks for each station) [E] Field notes held in field note book and filed locally (typed up in C) [F] Marine Recorder data entry spreadsheets [G] Marine Recorder Survey - MRCCW3170000000A
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Database
()
Quality
Data quality
- Quality Scope
- Dataset
- Lineage
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This follows on from previous ground-truthing carried out in 2011 (project 313): Across Wales drop-down video monitoring, 2012: North Llyn ground truthing. Drop-down video is useful for gathering large volumes of data across wide areas of seabed and often to depths beyond which diver observations can be safely made. Detailed methods and site location are described in CCW Marine Monitoring report 24a. Amendments to the previous methods include the addition of a HD video camera system manufactured by C-Technics in place of the SD camera previously used. A Cannon EOS 400D digital SLR was also used in a housing manufactured by Rovtech systems. Photographic stills were taken every 11 seconds along the tows to assist with species and habitat validation. GIS vessel tracks exported from Boat GPS. GIS Start and end points and field notes also supplied.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
- NRW Thesaurus
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- Video survey
- benthic marine habitats
- Type
- Theme
Citation
- Date (Publication)
- 2023-12-31
Keywords
- SeaDataNet Parameter Discovery Vocabulary
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- Habitat characterisation
- Habitat extent
- Seabed photography
- Zoobenthos taxonomic abundance
- Type
- Theme
Citation
- Date (Revision)
- 2021-01-06
Spatial Reference System
Content
Content Information
NRW Profile
Custom Elements
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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There are no access restrictions on this data. NRW may release, publish or disseminate it freely.
Use Constraints
- Use constraints type
- Other restrictions
- Other constraints
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© CNC/NRW 2012. Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and copyright of the owners. It is the recipient's responsibility to ensure the data is fit for the intended purpose.
Metadata
Metadata
- File Identifier
- 4f4c4942-4343-5764-6473-313135353235 XML
- Metadata Language
- English
- Parent Identifier
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Natural Resources Wales (NRW) Marine Benthic Species and Habitat Collation Held in Marine Recorder
NRW_DS114501
- Resource type
- Dataset
- Metadata Date
- 2024-12-09T12:38:06.368Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
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1.0