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

Identifier
NRW_DS115525
Alternative Title
  • 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

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
Owner
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Originator
  CCW Marine Monitoring Team
Countryside Council for Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW
http://naturalresourceswales.gov.uk/splash?orig=/
 

Extent

Extent

Geographic Extent
GWYNEDD - GWYNEDD
N
W
E
S
Map representing the geographic extent of the dataset


 

Vertical Extent

Medin Extent Keyword
benthic boundary layer
 
 

Distribution

Format Type and Description
  • Database ()

    Specification

    [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

 

Quality

Data quality

Quality Scope
Dataset
Conformity
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
Explanation
Degree
false
Lineage

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

GEMET - INSPIRE themes, version 1.0
Type
Theme

Citation

Date (Publication)
2008-06-01
Code
geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

Keywords

NRW Thesaurus
  • Video survey
  • benthic marine habitats
Type
Theme

Citation

Date (Publication)
2023-12-31
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords

Keywords

SeaDataNet Parameter Discovery Vocabulary
  • Habitat characterisation
  • Habitat extent
  • Seabed photography
  • Zoobenthos taxonomic abundance
Type
Theme

Citation

Date (Revision)
2021-01-06
Code
geonetwork.thesaurus.external.theme.rdf+xml
 

Spatial Reference System

Code
Latitude and Longitude (EPSG::4326)
 

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

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

© 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
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

1.0

pointOfContact
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
 
 

Publishing Body

Access the portal