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Metadata: 2013, EGS, London Array, Geophysical Export Cable Route Survey
Abstract:
In August 2013 EGS International were commissioned to carry out bathymetric surveys of the London Array Export cable routes. The Bathymetric surveys were to cover the 4 export cables corridor as laid and with a buffer of 25m either side of the outermost cable. The vessel mobilisation was carried out in Ramsgate between 27th and 30th August 2013. The bathymetric survey work was carried out onboard the Wessex Explorer between 27th August and 09th September 2013. The survey equipment was demobilised from the vessel on 9th September 2013 in Ramsgate. Data were collected in ETRS89 Datum with RTK corrections supplied from LAL (Dong London Array) /Dansurvey setup. The VORF model was utilised to reduce data to LAT and for comparative purposes a surface with a fixed offset of 42.1 was also created in order to compare the 2010 and 2013 datasets. Data comparison between the 2010 and 2013 datasets show general movement of sediment in certain areas along the route with the majority of sandwave migration occurring in the outer cable route east of the Kentish flats.
Data holder:
The Crown Estate
| Other details | ||
| Internal code | Internally assigned metadata identifier | 18985 |
| 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. | 2013, EGS, London Array, Geophysical Export Cable Route Survey |
| Alternative title | The purpose of alternative title is to record any additional names by which the dataset may be known. | Geophysical Export Cable Route Survey |
| 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. | 1407c884-1fda-4006-8831-5e72fb775ece |
| Resource Identifier | This is the code assigned by the data owner. | TCE-1012 |
| 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. | series |
| Start date | This describes the date the resource starts. This may only be the year if month and day are not known | 2013-08-27 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2013-09-09 |
| 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. | In August 2013 EGS International were commissioned to carry out bathymetric surveys of the London Array Export cable routes. The Bathymetric surveys were to cover the 4 export cables corridor as laid and with a buffer of 25m either side of the outermost cable. The vessel mobilisation was carried out in Ramsgate between 27th and 30th August 2013. The bathymetric survey work was carried out onboard the Wessex Explorer between 27th August and 09th September 2013. The survey equipment was demobilised from the vessel on 9th September 2013 in Ramsgate. Data were collected in ETRS89 Datum with RTK corrections supplied from LAL (Dong London Array) /Dansurvey setup. The VORF model was utilised to reduce data to LAT and for comparative purposes a surface with a fixed offset of 42.1 was also created in order to compare the 2010 and 2013 datasets. Data comparison between the 2010 and 2013 datasets show general movement of sediment in certain areas along the route with the majority of sandwave migration occurring in the outer cable route east of the Kentish flats. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | This survey represents DONG Deliverable 746. MV Wessex Explorer is permanently mobilised with a suite of hydrographic equipment including a V5 Applanix POS MV 320E, hull-mounted Kongsberg EM3002D Multibeam Echo Sounder (MBES) and a C&C Technologies C-Nav 2050 DGPS. A Leica 1200 GPS was also installed to acquire precise vertical measurements, allowing near-real-time computation and normalisation of the tide element prior-to post-processing of the V5 Applanix POS MV 320E data with POSPac MMS 6.2. On 15th May 2013, Geo-Spatial Survey Solutions conducted a Reference Frame Survey (RFS) of MV Wessex Explorer whilst the vessel was on a hard stand in Gosport shipyard (Hampshire, England). The full RFS survey report is included within this document, as Appendix A. Land survey and photogrammetric techniques were used to establish sensor offset locations & orientations relative to the vessel reference frame (established by the RFS). The horizontal and vertical origin of coordinates, the common reference point (CRP) (x = 0.0000m; y = 0.0000m; z = 0.0000m), was defined as the centre of the indicator on the top of the V5 Applanix Type40 IMU (Figure 3), in close proximity to the vessel’s centre line. The V5 Applanix Type40 IMU was installed away from the MBES transducers in order to provide line-of-sight for the RFS, thereby maximising RFS precision and accuracy. |
| Related keywords | ||
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Acoustic backscatter in the water column |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Sound velocity and travel time in the water column | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Bathymetry and Elevation | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Post-Construction monitoring | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Offshore Cable Corridor | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Elevation | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Oceanographic geographical features | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 51.8 |
| East | The eastern-most limit of the data resource in decimal degrees | 1.7 |
| South | The southern-most limit of the data resource in decimal degrees | 51.4 |
| West | The western-most limit of the data resource in decimal degrees | 1.3 |
| 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 | DONG Energy Power (UK) Ltd | |
| Position name | Data Manager | |
| receplon@dongenergy.co.uk | ||
| 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 | The Crown Estate | |
| Phone | +44 020 7851 5000 | |
| enquiries@thecrownestate.co.uk | ||
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | EGS (International) Ltd | |
| Phone | +44 1420 489 329 | |
| info@egssurvey.co.uk | ||
| Role | The distributor is the person or organisation that distributes the resource. | distributor |
| Organisation name | The Crown Estate | |
| Phone | +44 020 7851 5000 | |
| enquiries@thecrownestate.co.uk | ||
| Role | The owner is the person or organisation that owns the resource. | owner |
| Organisation name | RWE Renewables UK Swindon Limited | |
| support@rwe.com | ||
| Resource locators | ||
| Locator URL | Web address (URL) that links to the resource | https://www.marinedataexchange.co.uk/details/TCE-1012/summary |
| Web address (URL) that links to the resource | https://www.marinedataexchange.co.uk | |
| 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 | There will be no limitations when published on the Marine Data Exchange | |
| 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. | Data Must be used in accordance to the Marine Data Exchange's Terms of Use: https://www.marinedataexchange.co.uk/content/info/terms-of-use |
| 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. | 2022-05-23 |
| Harvest date | The date which this record has been (re)harvested from the provider. | 2026-04-19 |
| Metadata date | The date when the content of this metadata record was last updated. | 2026-03-31 |
| 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 |