North Atlantic Seafloor Bathymetry Grid From Halifax To Tromsø

100-meter resolution bathymetric grid data mapping the North Atlantic seafloor along a transect from Halifax, Canada to Tromsø, Norway. The survey was conducted by the CCGS Louis S. St-Laurent using a Kongsberg EM122 multibeam echosounder, achieving IHO Order 1a vertical accuracy standards. Data was produced as part of the Atlantic Ocean Research Alliance's fifth project under the Galway Statement.

Use Cases

• Model seafloor terrain and slope using the 100 m resolution bathymetry grid for habitat mapping.
• Analyze bathymetric data corrected with in-situ sound velocity profiles for oceanographic research.
• Apply the IHO Order 1a accuracy standard (Total Vertical Uncertainty < 26m) to validate survey data against overlapping datasets.
• Use the BAG (Bathymetric Attributed Grid) format for 3D visualization and nautical charting applications.

Strengths

• Achieves IHO Order 1a survey standards with a Total Vertical Uncertainty (TVU) verified to be less than 26 meters.
• High-resolution geographic grid data with a 100 m x 100 m pixel resolution.
• Data collection involved precise positioning using a Trimble GNSS receiver and an Applanix POS/MV v5 inertial system.

Limitations

• Tidal corrections were set to zero due to poorly known tides in the survey area, which may introduce minor vertical error in shallow regions.
• Primary data format is BAG, which may require specialized GIS or hydrographic software for full analysis.

Provenance

Source

Fisheries and Oceans Canada, as part of a collaboration between Canada, the United States, and the European Union under the Atlantic Ocean Research Alliance.

Collection Method

Multibeam echosounder (Kongsberg EM122) survey from the CCGS Louis S. St-Laurent icebreaker, with applied in-situ sound velocity profiles and WGS84 horizontal datum.

Time Range

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Freshness

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Geography

North Atlantic seafloor along a transect from Halifax, Canada to Tromsø, Norway.