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Metadata: Drop-Down Video North Wales Survey 2012
Abstract:
Drop down video survey of seabed off the north coast of Pen Llyn and in Tremadog Bay, North Wales, carried out by Countryside Council for Wales (CCW) in 2012. The dataset comprises of 26 video tows each of approximately 10 minutes in length with a set of still images that are taken approximately every 10 seconds along the length of the tow. Videos and stills subsequently analysed by Coastal Assessment, Liaison and Monitoring, under contract to CCW, to describe habitats, species and biotopes. The purpose of this data capture was to improve CCW's seabed habitat maps in those areas. 4 sites off the north coast of Pen Llyn, between Porth Dinllaen and Porth Colman, and 22 sites distributed around the northern half of Tremadog Bay.
Data holder:
Natural Resources Wales (NRW)
Click on the red button for resource contact details:
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| Other details | ||
| Internal code | Internally assigned metadata identifier | 8836 |
| 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. | Drop-Down Video North Wales Survey 2012 |
| Alternative title | The purpose of alternative title is to record any additional names by which the dataset may be known. | CCW Drop Down Video North Wales Survey 2012, 2012 CCW Drop Down Video North Wales Survey MRCCW31600000009 |
| 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_DS115296 |
| Resource Identifier | This is the code assigned by the data owner. | 4f4c4942-4343-5764-6473-313135323936 |
| 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 | 2012-06-27 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2012-07-05 |
| 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. | Drop down video survey of seabed off the north coast of Pen Llyn and in Tremadog Bay, North Wales, carried out by Countryside Council for Wales (CCW) in 2012. The dataset comprises of 26 video tows each of approximately 10 minutes in length with a set of still images that are taken approximately every 10 seconds along the length of the tow. Videos and stills subsequently analysed by Coastal Assessment, Liaison and Monitoring, under contract to CCW, to describe habitats, species and biotopes. The purpose of this data capture was to improve CCW's seabed habitat maps in those areas. 4 sites off the north coast of Pen Llyn, between Porth Dinllaen and Porth Colman, and 22 sites distributed around the northern half of Tremadog Bay. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Drop down video survey was conducted from Countryside Council for Wales' (CCW) survey boat Pedryn, an 11.7 m Delta cabined RIB. The CCW camera system is C-Vision HD with a C-vision mantis HD camera video recorder, a 200 m umbilical cable, a video camera in a waterproof housing mounted on a metal frame sled with two HID lights mounted on either side of the camera. In addition, a laser scaling device comprising two parallel laser beams, 10 cm apart, provide an indication of size and scale. The auto stills camera is a Seacam Digital still camera (18 mega pixel CMOS chip) with dual Seabeam underwater Strobe lamps. The surface control unit overlays realtime data such as time, date, depth of camera and position of vessel on the captured video which are recorded to the miniDV recorder. The camera was towed for approximately ten minutes at each location, recording continuous video plus still images every 10 seconds. The sled was towed at 0.5-1.0 knot (ideally) across the seabed either by drifting with the currents or using the drive of the vessel. A manual log was kept of the position and depth at the start and end of transect plus details of substratum type and main taxa observed on the screen during the tow. Video and stills were subsequently analysed by a experienced marine biological surveyor to record information on habitat character, conspicuous species and their abundance (SACFOR scale), and to assign biotopes from the national biotope classification. Analysis included a QA process to validate and verify the recorded data. |
| 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 | benthic marine habitats | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Video survey | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Zoobenthos taxonomic abundance | |
| 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 characterisation | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 53.12958294 |
| East | The eastern-most limit of the data resource in decimal degrees | -4.10794866 |
| South | The southern-most limit of the data resource in decimal degrees | 52.72562274 |
| West | The western-most limit of the data resource in decimal degrees | -4.91833423 |
| Regional sea | benthic boundary layer | |
| GWYNEDD - GWYNEDD | ||
| 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 | Countryside Council for Wales (CCW) | |
| Delivery point | Countryside Council for Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW | |
| enquiries@naturalresourceswales.gov.uk | ||
| URL | http://naturalresourceswales.gov.uk/splash?orig=/ | |
| 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 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. |
| 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 | Movie |
| Format in which digital data can be provided for transfer | Image | |
| Format in which digital data can be provided for transfer | Delimited (MS Excel) | |
| Format in which digital data can be provided for transfer | Documents | |
| Format in which digital data can be provided for transfer | Geographic Information System (MapInfo) | |
| Format in which digital data can be provided for transfer | Database (Marine Recorder) | |
| 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. | 2012-11-30 |
| 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 |