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Metadata: Findings of drop down video and stills imagery from an area of drumlins off Northwest Anglesey, July 2019
Abstract:
This data contains the raw products of a seabed survey of an area of drumlins off north west Anglesey. The images and video was taken by a Natural Resources Wales owned drop down camera system to provide a better understanding of the seabed structure and biological communities at the survey sites and to investigate the presence of non-native species. The data contains Video (.asf) (and still images (.JPG) The data was collected on the 11th July 2019. The a copy of the MR snapshot produced after data analysis by the contractor is also supplied here. The analysis of the video and stills imagery followed guidelines provided by NRW, Marine EcoSol’s in-house standard operating procedures, and JNCC/NMBAQC recommendations. The video camera showed a swath of seabed approximately 0.3m wide, while still images showed an area estimated as about 0.13m2. All images were reviewed using appropriate high-quality imaging equipment capable of playing and displaying full HD video at 1920p x 1080p resolution. The video and set of stills from each tow were reviewed prior to detailed assessment and recording, and the boundaries between biotopes or biotope complexes noted by recording the time and positional coordinates at which major changes in seabed and habitat type occurred. The species and substratum in each habitat ‘sample’ (tow section) was then recorded, and biotopes assigned. Discrete habitat tow sections or ‘samples’ as defined above were determined using a combination of video and stills images. The lower quality video imagery was then linked to the ‘sample’ in terms of data recording using the time stamp on the video playback. Higher quality stills images were used to identify and quantify substrates and taxa, with abundances pooled to assess the abundance of the taxa over each sample.
Data holder:
Natural Resources Wales (NRW)
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| Other details | ||
| Internal code | Internally assigned metadata identifier | 8888 |
| Title | The title is used to provide a brief and precise description of the dataset such as 'Date', 'Originating organisation/programme', 'Location' and 'Type of survey'. All acronyms and abbreviations should be reproduced in full. | Findings of drop down video and stills imagery from an area of drumlins off Northwest Anglesey, July 2019 |
| File Identifier | The File Identifier is a code, preferably a GUID, that is globally unique and remains with the same metadata record even if the record is edited or transferred between portals or tools. | NRW_DS125640 |
| Resource Identifier | This is the code assigned by the data owner. | 4f4c4942-4343-5764-6473-313235363430 |
| Resource type | The resource type will likely be a dataset but could also be a series (collection of datasets with a common specification) or a service. | dataset |
| Start date | This describes the date the resource starts. This may only be the year if month and day are not known | 2019-07-11 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2019-07-11 |
| Frequency of updates | This describes the frequency with which the resource is modified or updated i.e. a monitoring programme that samples once per year has a frequency that is described as 'annually'. | notPlanned |
| Abstract | The abstract provides a clear and brief statement of the content of the resource. | This data contains the raw products of a seabed survey of an area of drumlins off north west Anglesey. The images and video was taken by a Natural Resources Wales owned drop down camera system to provide a better understanding of the seabed structure and biological communities at the survey sites and to investigate the presence of non-native species. The data contains Video (.asf) (and still images (.JPG) The data was collected on the 11th July 2019. The a copy of the MR snapshot produced after data analysis by the contractor is also supplied here. The analysis of the video and stills imagery followed guidelines provided by NRW, Marine EcoSol’s in-house standard operating procedures, and JNCC/NMBAQC recommendations. The video camera showed a swath of seabed approximately 0.3m wide, while still images showed an area estimated as about 0.13m2. All images were reviewed using appropriate high-quality imaging equipment capable of playing and displaying full HD video at 1920p x 1080p resolution. The video and set of stills from each tow were reviewed prior to detailed assessment and recording, and the boundaries between biotopes or biotope complexes noted by recording the time and positional coordinates at which major changes in seabed and habitat type occurred. The species and substratum in each habitat ‘sample’ (tow section) was then recorded, and biotopes assigned. Discrete habitat tow sections or ‘samples’ as defined above were determined using a combination of video and stills images. The lower quality video imagery was then linked to the ‘sample’ in terms of data recording using the time stamp on the video playback. Higher quality stills images were used to identify and quantify substrates and taxa, with abundances pooled to assess the abundance of the taxa over each sample. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | The images and video was taken by a Natural Resources Wales owned high definition camera drop down camera system from the survey vessel Mersey Guardian. It was deployed at a total of nine locations situated between 5km and 20km off the north west coast of Anglesey in an area of drumlin fields. Individual tows ranged from 319m to 864m in length most being between 500m and 700m. Depths ranged from 43m to 65m. Over two hours of video footage were collected together with 998 usable still images. Tow speeds ranged from 0.2knots up to 2.6knots, the faster speeds resulting in poor quality video imagery. In general stills image quality was good. All data were entered into Marine Recorder v5.7 under the Marine Recorder survey name ‘2019 Draft NRW Northwest Anglesey Drumlin Survey’. Each tow was a survey event, each habitat section a ‘sample’. |
| Additional information | This describes relevant references to the data e.g. reports, articles, websites plus other useful information not captured elsewhere. | Baldock, L., Morris-Webb, L. 2020. Report on findings of drop down video and stills imagery from an area of drumlins off Northwest Anglesey, July 2019. NRW Evidence Report No: 401, 26pp, Natural Resources Wales, Bangor. |
| Related keywords | ||
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Habitats and biotopes |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Drumlins | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | towed video | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Seabed photography | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Habitat extent | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Habitat characterisation | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 53.4301 |
| East | The eastern-most limit of the data resource in decimal degrees | -4.0394 |
| South | The southern-most limit of the data resource in decimal degrees | 53.1262 |
| West | The western-most limit of the data resource in decimal degrees | -4.7004 |
| Regional sea | circalittoral | |
| Irish Sea | ||
| Responsible organisations | ||
| Role | The point of contact is person or organisation with responsibility for the creation and maintenance of the metadata for the resource. | pointOfContact |
| Organisation name | Natural Resources Wales (NRW) | |
| Delivery point | Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales | |
| enquiries@naturalresourceswales.gov.uk | ||
| URL | http://naturalresources.wales/?lang=en | |
| Role | The owner is the person or organisation that owns the resource. | owner |
| Organisation name | Natural Resources Wales (NRW) | |
| Delivery point | Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales | |
| enquiries@naturalresourceswales.gov.uk | ||
| URL | http://naturalresources.wales/?lang=en | |
| Role | The custodian is the person or organisation that accepts responsibility for the resource and ensures appropriate care and maintenance. If a dataset has been lodged with a Data Archive Centre for maintenance then this organisation is be entered here. | custodian |
| Organisation name | Natural Resources Wales (NRW) | |
| Delivery point | Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales | |
| enquiries@naturalresourceswales.gov.uk | ||
| URL | http://naturalresources.wales/?lang=en | |
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | Natural Resources Wales (NRW) | |
| Delivery point | Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales | |
| enquiries@naturalresourceswales.gov.uk | ||
| URL | http://naturalresources.wales/?lang=en | |
| Role | The distributor is the person or organisation that distributes the resource. | distributor |
| Organisation name | Natural Resources Wales (NRW) | |
| Delivery point | Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales | |
| enquiries@naturalresourceswales.gov.uk | ||
| URL | http://naturalresources.wales/?lang=en | |
| Dataset constraints | ||
| 20.1 Limitations on Public Access - Access constraints | This states `otherRestrictions` from ISO vocabulary RestrictionCode and is an INSPIRE/GEMINI requirement. | otherRestrictions |
| 20.2 Limitations on Public Access - Other constraints | This states any limitations on access to the data. Multiple occurences are allowed here. One entry shall be from the INSPIRE Metadata registry and the other free text should be part of the resource `Have specific limitations`. | There are no access restrictions on this data. NRW may release, publish or disseminate it freely. |
| no limitations | ||
| 21.1 Conditions for Access and Use - Use constraints | This states `otherRestrictions` from ISO vocabulary RestrictionCode and is an INSPIRE/GEMINI requirement. | otherRestrictions |
| 21.2 Conditions for Access and Use - Other constraints | This states any constraints on use of the data. Multiple conditions can be recorded for different parts of the data resource. If no conditions apply, then `No condtions apply` is recorded. This uses free text. | © CNC/NRW Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and NRW's copyright. It is the recipient's responsibility to ensur |
| This states any constraints on use of the data. Multiple conditions can be recorded for different parts of the data resource. If no conditions apply, then `No condtions apply` is recorded. This uses free text. | Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved. | |
| https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ | ||
| Available data formats | ||
| Data format | Format in which digital data can be provided for transfer | Image |
| Format in which digital data can be provided for transfer | Movie | |
| Format in which digital data can be provided for transfer | Documents | |
| Version info | ||
| Date of publication | The publication date of the resource or if previously unpublished the date that the resource was made publicly available via the MEDIN network. | 2023-07-03 |
| Harvest date | The date which this record has been (re)harvested from the provider. | 2026-04-12 |
| Metadata date | The date when the content of this metadata record was last updated. | 2026-03-03 |
| Metadata standard name | The name of the metadata standard used to create this metadata | MEDIN |
| Metadata standard version | The version of the MEDIN Discovery Metadata Standard used to create the metadata record | 3.1.2 |