Multibeam sonar data for the Western Greenland Exclusive Economic Zone
EM302 bathymetric data subset covering the Greenland EEZ. Two versions of the datasets are available: the first version from the Ocean Mapping Group (2003-2013) and the second version, which integrates 2014. The second version is now under the responsibility of the Marine Geosciences Laboratory (LGM) at Laval University.
Simple
- Date (Revision)
- 2014-07-02T00:00:00
- Edition
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2
- Presentation form
- Digital document
- Purpose
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This bathymetric data collection is part of a core seabed-mapping project within the ArcticNet research program. Underway acoustic mapping of the seabed relief, sediment distribution and shallow subsurface sediments are the prime datasets used to understand the geological processes shaping the seafloor, to assess natural hazards and coastal habitats and to reconstruct the history of past climatic changes.
- Status
- On going
- Point of contact
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Organisation name Individual name Electronic mail address Role ArcticNet
ArcticNet Data Manager
pdc@arcticnet.ula pdc@arcticnet.ulaval.ca
Point of contact
- Maintenance and update frequency
- As needed
- Discipline
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Oceanography
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Bathymetry
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- Theme
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Greenland
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Hydrography
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Bathymetry
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GEMET - INSPIRE themes, version 1.0
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Oceanographic geographical features
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- Use limitation
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Data is available under the terms of the ICES Data Policy. (See: https://ices.dk/data/guidelines-and-policy/Pages/ICES-data-policy.aspx)
- Access constraints
- Other restrictions
- Use constraints
- Other restrictions
- Other constraints
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Data is available under the terms of the ICES Data Policy. (See: https://ices.dk/data/guidelines-and-policy/Pages/ICES-data-policy.aspx)
- Spatial representation type
- Vector
- Denominator
- 6000
- Language
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eng
- Character set
- UTF8
- Topic category
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- Oceans
- Begin date
- 2003-08-15T22:00:00
- End date
- 2014-10-15T00:00:00
- Reference system identifier
- WGS 1984
- OnLine resource
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Protocol Linkage Name WWW:LINK-1.0-http--link
https://www.polardata.ca/pdcsearch/PDCSearch.jsp?doi_id=12059 Polar Data Catalogue
WWW:LINK-1.0-http--link
http://www.polardata.ca/pdcsearch/PDCSearchDOI.jsp?doi_id=11677&doi_name=1 Polar Data Catalogue
- Hierarchy level
- Dataset
- Statement
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The second version of data collected by the CCGS Amundsen (and other platforms) is presented in the form of 14 grid tiles. Each tile covers 1┬║ of latitude and 5┬║ of longitude (5.5 ┬║ for the most western tile) with a resolution of 10 metres. The tiles are in ESRI grid format (.flt and .hdr files and .asc zipped for each tile). Data are gridded at a resolution of 10 metres.
A Lambert Conformal Conic projection (with two standard parallels) is used for the ArcticNet Basemap series of mapsheets. In order to minimize distortion in the areas of most interest, the standard parallels were specifically chosen to follow the two major east-west channels through the Northwest Passage (Parry Channel and Queen Maud/Coronation Gulf). The projection parameters are as follows:
ÔÇó 1st Standard parallel: 70┬░
ÔÇó 2nd Standard parallel: 73┬░
ÔÇó Origin latitude: 70┬░
ÔÇó Origin longitude: -105┬░
ÔÇó False easting: 2,000,000 metres
ÔÇó False northing: 2,000,000 metres
Datums
Horizontal datum: WGS84 (G1150)
Vertical datum: soundings are reduced to mean sea level (MSL) using the WebTide tidal prediction models.
Data_Quality_Information
Attribute_Accuracy: All sounding data was inspected in real-time and in post-processing and then all overlapping data was checked to ensure reliability.
Logical_Consistency_Report: NULL
Completeness_Report: Data is collected 24 hours a day during the entire cruise. Data gaps may exist when the ship was on station as data is only collected while the ship is moving.
Positional_Accuracy:
Horizontal_Positional_Accuracy: 1.0 meter (95% confidence) from CNav RTG GPS
Vertical_Positional_Accuracy: Tidal accuracy estimated at 0.3 m (95% confidence) from Arctic8 tidal model.
Since time is at a premium while underway, there are often cases where long transits are undertaken with little or no sound speed profiles collected. On the other hand, some oceanographic sections sampled by the Amundsen provide very dense sound speed information throughout the watercolumn. In sections where the watercolumn is poorly sampled, the 1/4 ┬░ World Ocean Atlas (2009) climatology is used as a source of sound speed.
Metadata
- File identifier
- 952ef0f2-7987-465c-92a6-a9c038f50afb XML
- Metadata language
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eng
- Character set
- UTF8
- Date stamp
- 2020-01-15T12:09:17
- Metadata standard name
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ISO 19115:2003/19139
- Metadata standard version
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1.0
- Metadata author
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Organisation name Individual name Electronic mail address Role ArcticNet Inc
ArcticNet Data Coordinator
pdc@arcticnet.ula pdc@arcticnet.ulaval.ca
Point of contact