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| Data set name | Celtic Voyager Bathymetry CV_13_02 AREA 1 Cork WGS84 14M Globe DTM |
| Discipline | |
| Parameter groups | |
| Discovery parameter | |
| GEMET-INSPIRE themes | Oceanographic geographical features |
| Abstract | 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 of Ireland and the Marine Institute. The Marine Institute vessel, the R.V. Celtic Voyager was used as the survey platform. The scientific aims of the surveys were to: (i) Undertake a Multibeam Echo Sounder (MBES) hydrographic survey to International Hydrographic Organisation (IHO) Order 1a standard. (ii) Produce bathymetry, shaded relief and backscatter mosaic products to provide depth, seabed features and seabed hardness information. (iii) Acquire Sub Bottom Profiler (SBP) data of the shallow (up to 30 metres) sub seabed to determine the existence of buried objects and ascertain the sub-seabed character. (iv) Acquire magnetometer data to investigate the sub seabed geology and provide information on manmade seafloor debris. (v) Undertake detailed surveys of any wrecks or shoals discovered and provide standard template H-Forms of these to the United Kingdom Hydrographic Office (UKHO). A Kongsberg hull mounted EM3002 high resolution MBES was used for swathe acoustic acquisition. The system operates at 293 and 307 kHz with 508 soundings per ping at a maximum angular coverage of 70° (for this survey) per head. It has a maximum ping rate of 40 Hz. Positioning was provided by C-Nav 3050 DGNSS and these data were integrated with inertial measurement units by a Seatex Motion Reference Unit (MRU) to give real time heading, heave, pitch and roll, position and velocity of the MBES system. An EA400 hull mounted SBES provided further depth information along ships profile. The EA400 is a dual frequency system with both 38 kHz and 200 kHz capability. The 38 kHz frequency was switched off throughout as it interfered with the MBES. MRU data was directly fed into the SBES. A Sonar Equipment Services hull mounted pinger source 2x2 transducer array SBP operating at 3.5 kHz was used for shallow sub-surface data acquisition. QINSy was used as the navigation and line planning software. QINSy can visualise and QA data-feeds from key acquisition systems. Position information for SVP data, groundtruthing data, equipment deployment, wreck investigations etc. is recorded in, and may be output from this software. A Valeport MIDAS SVX2 Combined CTD (Conductivity Temperature Depth)/SVP instrument and a YSI CastAwayTM CTD were used to obtain sound velocity for the echosounders. MBES and SBES data were processed onboard using Caris Hips & Sips. C-Nav DGNSS provided the primary navigation. The C-Nav 3050 is a dynamic DGNSS Precise Point Positioning (PPS) system providing accuracy of <0.1 metre horizontally and 0.2 metre vertically. It provides 66 channel tracking, including multi-constellation support for GPS, GLONASS and Galileo. C-Nav provided the primary navigation feed for the MBES, SBES, SBP and magnetometer sensors. C-Nav also provided a reliable GPS tide correction after post processing in Terrapos software. Seapath 200 provided the secondary navigation. Water depths have been reduced to chart datum (VORF LAT). The Hydrographic component of this survey has been conducted to IHO Order 1 Multibeam standards. Please reference the INFOMAR projects when the data is used in publications & presentations. Visit http://www.infomar.ie for more information. All of this data & reports (CV_13_02_RPT.doc) can be downloaded free of charge in a variety of formats from https://jetstream.gsi.ie/iwdds/map.jsp |
| Related EDMED dataset | INFOMAR Seabed Survey Multibeam Surveyed Area around Ireland |
| Data format | |
| Data size | 149.000 MB
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| Data set creation date | 20171017 |
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| Map | |
| GML id | ms01 |
| GML objects | | Name | Description |
|---|
| Boundary | Boundary |
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| Datum | World Geodetic System 84 |
| Measuring area type | surface |
| Minimum instrument depth (m) | 16.73 |
| Maximum instrument depth (m) | 111.12 |
| Sea regions | |
| Location qualification | Landward side of the 12 NM boundary |
| MSFD areas | North East Atlantic Ocean |
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| Start date | 20130711 |
| Start time | 00:00:00 |
| End date | 20130807 |
| End time | 00:00:00 |
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| Instrument/gear category | |
| Platform type | |
| Cruise name | CV_13_02 |
| Alternative cruise name | CV_13_02 |
| Cruise start date | 20130711 |
| Cruise Summary Report (CSR) | INFOMAR Seabed Survey - Celtic Voyager(45CV) |
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| Data originator | Geological Survey Ireland |
| Data custodian | Geological Survey Ireland |
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| Data Distributor | Geological Survey Ireland |
| Database reference | GSI’s data can be downloaded free of charge in various formats from https://jetstream.gsi.ie/iwdds/
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| Access/ordering of data | web data access with registration |
| Access restriction | |
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| 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 | 2017-10-02 | Hydrographic survey or compatible with hydrographic standards | | QI_Vertical | 2017-10-02 | MBES high frequency (larger than 100kHz) | | QI_Horizontal | 2017-10-02 | smaller than 20m |
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| Lineage | The data centres apply standard data quality control procedures on all data that the centres manage. Ask the data centre for details. |
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| CDI-record id | 2270143 |
| Version | 0 |
| CDI-record initial import date | 2015-06-16 17:15:33.020 |
| CDI-record last update | 2017-10-19 20:55:04.937 |
| Point of contact | Geological Survey Ireland |