|
| Data set name | Celtic Voyager Bathymetry CV20_02 Aran Grounds 14m WGS84 Globe DTM |
| Discipline | |
| Parameter groups | |
| Discovery parameter | |
| GEMET-INSPIRE themes | Oceanographic geographical features |
| Abstract | Description of measurements/samples, purpose for which they were collected, and the platforms/instrumentation and methods in collection RV Celtic Voyager 2020 Leg 2 North Atlantic Ocean Aran Grounds 14m Globe DTM WGS 1984 projection Lowest Astronomical Tide (LAT). The GSI has been permitted to utilise the UKHO VORF (Vertical Offshore Reference Frame) sea surface model. This model allows the use of ‘GPS tides’ and the GSI has gridded this model to a 1km resolution around Ireland to 15km offshore for reducing all soundings to Lowest Astronomical Tide - LAT (VORF). By utilising ‘GPS tides’ there is no requirement to adjust for draft or squat as the water level is modelled over the seabed as measured to the WGS84 ellipsoid. This area was surveyed as part of the ongoing INFOMAR project (formerly Irish National Seabed Survey), a joint seabed mapping project between the Geological Survey Ireland and the Marine Institute. Survey work was conducted to standards and recommendations set out by INFOMAR, the International Hydrographic Organisation (IHO), the United Kingdom Hydrographic Office (UKHO) and the UK’s Maritime and Coastguard Agency (MCA). Please note the following: Data acquired prior to March 2011 were levelled to Lowest Astronomical Tide (LAT) using shifts derived from Proudman Oceanographic tidal model. Tidal height was derived using a network of offshore and onshore tide gauges. As such data are on average 0.54m deeper than the more recent UKHO Vertical Offshore Reference Frame (VORF) levelled data. We are currently updating the older datasets. Statement on the level of data processed and quality control, limitations on reliability INFOMAR bathymetry products generated to meet International Hydrographic Organization (IHO) standards to ensure gridded data positional accuracy in the horizontal (XY) and vertical (Z) frame. Arrangement of data Data has been processed and arranged into a GLOBE DTM grid using XYZ data. Spatial and temporal resolution of data within the dataset Image resolution is a 14m DTM grid. Length of time series Image created from data collected between 2020-08-29 and 2020-09-22 Amount of data expressed in number of stations, sites, observations, cores, months of recordings, miles of track or other units as appropriate Bathymetry image meets GLOBE DTM standard. Data provided under Creative Commons licence access and use conditions. Users of this data should provide the following attribution statement "Contains Irish Public Sector Data (Geological Survey Ireland; Marine Institute) licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) licence" |
| Related EDMED dataset | INFOMAR (Seabed Survey) Bathymetry around Ireland |
| Data format | |
| Data size | 94.800 MB
|
| Data set creation date | 20230914 |
|
| Map | |
| GML id | ms01 |
| GML objects | | Name | Description |
|---|
| CV20_02_AranGrounds | Aran Grounds |
|
| Datum | World Geodetic System 84 |
| Measuring area type | surface |
| Depth reference | Lowest Astronomical Tide |
| Minimum instrument depth (m) | -108.38 |
| Maximum instrument depth (m) | -91.28 |
| Sea regions | |
| Location qualification | Both (Landward + beyond the 12 NM boundary) |
| Ices areas | Celtic Seas |
| MSFD areas | North East Atlantic Ocean |
| Ospar areas | Celtic Seas |
|
| Start date | 20200829 |
| Start time | 00:00:00 |
| End date | 20200922 |
| End time | 23:59:59 |
| Temporal resolution | 1 |
| Temporal resolution | Minutes |
|
| Instrument/gear category | |
| Horizontal resolution | 14 |
| Horizontal resolution | Metres |
| Vertical resolution | 14 |
| Vertical resolution | Metres |
| Platform type | |
| Cruise name | CV20_02 |
| Alternative cruise name | CV20_02 |
| Cruise start date | 20200829 |
|
| Data originator | Marine Institute |
| Data custodian | Geological Survey Ireland |
|
| Data Distributor | Geological Survey Ireland |
| Database reference | BY_CV20_02_AranGrounds_14m_WGS84.dtm.nc
|
| Access/ordering of data | web data access with registration |
| Access restriction | |
|
| Quality info | | Name | Date | Comment |
|---|
| COMMISSION REGULATION (EC) No 1205/2008 of 3 December 2008 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards metadata | 2008-12-04 | See the referenced specification | | 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 | 2010-12-08 | See the referenced specification | | QI_Purpose | 2022-01-05 | Hydrographic survey or compatible with hydrographic standards | | QI_Horizontal | 2022-01-05 | smaller than 20m | | QI_Vertical | 2022-01-05 | MBES high frequency (larger than 100kHz) |
|
| Lineage | The data centres apply standard data quality control procedures on all data that the centres manage. Ask the data centre for details. |
|
| CDI-record id | 3559562 |
| Version | 0 |
| CDI-record initial import date | 2023-09-18 22:17:26.970 |
| CDI-record last update | 2023-09-18 22:17:29.477 |
| Point of contact | Geological Survey Ireland |