Holyhead Marina Ultrasound Trial Footage 2020-2021
Video (MP4) taken by a Natural Resources Wales owned Underwater Remotely Operated Vehicle (Chasing Innovation M2) at Holyhead marina. This was part of the baseline survey and monitoring of effectiveness of the ultrasound trial attempted in Holyhead marina to eradicate Didemnum vexillum. Video stills (JPG) were captured from the footage.
The data was collected between October 2020 and January 2021.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS125389
- Alternative Title
-
- Holyhead Marina pontoon video survey supporting the Didemnum vexillum ultrasound eradication trial
- Metadata Language
- English
- Lineage
-
The UROV was deployed and operated from the surface by a suitably qualified pilot. Footage was taken in horizontal transect lines along the 6 operational Holyhead Marina pontoons at depths of 0.5 meters and 1.5 meters. The UROV was operated so that it captured footage of the marine growth attached to the pontoon surfaces and allowed for identification of areas where D. vex was present. At times the pontoon surfaces were obscured by heavy algal cover which affected the analysis of the video footage.
- Dataset Reference Date (Publication)
- 2022-11-09
Extent
Extent
- Geographic Extent
- Irish Sea
))
Vertical Extent
- Medin Extent Keyword
-
infralittoral
Vertical Extent
- Minimum value (metres)
- 0.5
- Maximum value (metres)
- 1.5
- Vertical CRS
Distribution
- Format Type and Description
-
-
Image
(
Unknown
)
- Specification
-
Movie: MP4 video files of the marine life on the pontoons at Holyhead marina before and after the ultrasound trial Image: Still images in PNG format of the marine life on the pontoons at Holyhead marina before and after the ultrasound trial
-
Image
(
Unknown
)
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
-
This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
- Degree
- false
- Lineage
-
The UROV was deployed and operated from the surface by a suitably qualified pilot. Footage was taken in horizontal transect lines along the 6 operational Holyhead Marina pontoons at depths of 0.5 meters and 1.5 meters. The UROV was operated so that it captured footage of the marine growth attached to the pontoon surfaces and allowed for identification of areas where D. vex was present. At times the pontoon surfaces were obscured by heavy algal cover which affected the analysis of the video footage.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
-
NRW Thesaurus
-
- Holyhead marina
- Holyhead
- Invasive Non-Native Species (INNS)
- Didemnum vexillum
- Type
- Theme
Citation
- Date (Publication)
- 2025-01-08
Keywords
-
SeaDataNet Parameter Discovery Vocabulary
- Type
- Theme
Citation
- Date (Publication)
- 2024-06-19
Spatial Reference System
- Code
- NONE
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
-
Access restrictions on this data have not been determined. It may contain sensitive information and therefore may be restricted under legislation. NRW may provide access to this dataset on request, however NRW may not release, publish or disseminate the data or derived products freely without further assessment.
Use Constraints
- Use constraints type
- Other restrictions
- Other constraints
-
© CNC/NRW. Data may only be re-used externally under provision and in line with the terms of a NRW licence following an assessment of the data.
Metadata
Metadata
- File Identifier
- 4f4c4942-4343-5764-6473-313235333839 XML
- Metadata Language
- English
- Resource type
- Dataset
- Metadata Date
- 2026-03-03T14:33:51.785Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
-
1.0