The Belcher Glacier seabed mapping program was carried out over a 12-hour period in September 2006 and consisted of: 1) imaging of deeper parts of the inlet using the EM300 30 kHz multibeam sonar on the CCGS Amundsen icebreaker; and 2) detailed mapping adjacent to the tidewater front using the 300 kHz multibeam launch CSL Heron. Data files from this mapping project are archived in ASCII, ESRI, and GTIF formats."

Accoustic data was generated using an EM300 (2003-2008) and EM302 (2008-2017) multibeam sonar system onboard the CCGS Amundsen during ArcticNet Cruises. This bathymetric dataset covers the Canadian Arctic and includes all bathymetric data collected from CCGS Amundsen. The dataset consists of high-resolution bathymetry and acoustic backscatter imagery collected 24 hours a day, whenever the ship was in transit or during dedicated survey time. Standard collection settings used dual-ping, FM pulse, auto depth mode, angular coverage of +/- 60 degrees and high density equidistant beam forming. The SIS software was used to collect the data. From 2003-2013, near realtime cleaning of data outliers was done using the Ocean Mapping Group's Swathed toolkit after conversion to OMG binary format. After 2014, the data cleaning was done using CARIS HIPS&SIPS software. Data was exported in Generic Sensor Format (.gsf). IMU data was parsed by SIS from a POSMv 320 v.4. RTG GPS data from the CNAV 3050 GNSS receiver was used to correct and improve the position output from the POSMV via a RTCM correction protocol. Soundspeed information was either from CTD Rosette casts, MVP300 data or simulated from the World Ocean Atlas 2009 database. Data are gridded at a resolution of 10 metres. Grid files available are in binary floating point file (.flt). The grids will be available shortly on the Université Laval library's geospatial center website (www.geoindex-plus.bibl.ulaval.ca/). Note: 2003-2013 data was collected and processed by the OMG of University of New Brunswick (www.omg.unb.ca/Projects). 2014-2017 data was collected and processed by the Marine Geoscience Laboratory at Université Laval (www.lgm.ggr.ulaval.ca/index.php/projets/amundsen/). The 2018 data was collected and processed by Amundsen Science (http://www.amundsen.ulaval.ca). In 2018, Amundsen Science included the multibeam bathymetry data into the Amundsen Science Data Collection.

Multibeam echosounder data near Qikiqtarjuaq were collected by the CCGS Amundsen in 2007 and by the RV Nuliajuk from 2012-2015. Data collected between 2007 and 2014 were processed by the Ocean Mapping Group at the University of New Brunswick (http://www.omg.unb.ca/) and were retrieved from their data sharing interface (http://www.omg.unb.ca/Projects/Arctic/SE_Baffin/). Data collected in 2015 were processed by the Fisheries and Marine Institute at Memorial University of Newfoundland (https://www.mi.mun.ca/) and were obtained directly from them. These datasets were clipped to only include the area near Qikiqtarjuaq relevant to the benthic habitat mapping project lead by the Memorial University Marine Habitat Mapping Group. Individual datasets were mosaicked to create single continuous bathymetry (m) and backscatter (dB) raster layers at 5 m resolution. Mapping activities were funded by ArcticNet and the Government of Nunavut, Department of Environment, Fisheries and Sealing Division to support benthic habitat mapping for marine ecosystem management in this area.

The multibeam bathymetry data is acquired with a multibeam sonar Kongsberg EM302. For complete acquisition and processing description, see the Polar data Catalogue Metadata CCIN 12586 and 12732. Additionnal post-processing and data cleaning of the bathymetry was performed using the CARIS HIPS&SIPS 9.0 and BASE Editor 4.1. Sub-bottom profiles showing seabed stratigraphy were acquired with a Knudsen 320-BR sub-bottom profiles, operated at a frequency of 3.5 kHz. The profiles were processed using the Natural Resources Canada software suite. Ten (10) sediment cores from various locations are stored in the Laboratoire de Géoscience marine's (LGM) core archive. Each core was logged with a CT-scan. Further analysis will be performed in the next months/years.

The data set includes images of seafloor topography of the Canadian Beaufort Sea, rendered in both grey-scale and colour-shaded false sun-illumination collected by the Geological Survey of Canada (Atlantic and Pacific) through the support of several organizations. The images are derived from soundings from a hull-mounted multibeam sonar system. Two research vessels were involved in its collection. The Canadian Coast Guard vessel CCGS Amundsen conducted 3 successive research-oriented field surveys, from 2009 to 2011 using a Knudsen EM302 multibeam instrument. Between September 10th and October 10th, 2013, the Korean Oceanographic Polar Research Institute (KOPRI) research icebreaker Araon surveyed with an EM122 system. The Amundsen data represent an integration of the 3 successive field surveys, data collection was a part of collaboration between oil and gas industry partners (Imperial Oil Resources/British Petroleum), the GSC-A, and ArcticNet. Collaborators from the University of New Brunswick's Ocean Mapping Group have operated the Amundsen's compliment of geophysical equipment for the past several years, extending into the 2011 Expedition. The GSC-A conducted initial and post analysis of the acquired data. The KOPRI dataset stems from collaboration with the GSC-P. Vertical sound speed profiles were obtained from CTD casting stations and these velocities were applied to the acquisition system for correct depth calculations. Geologic features in the image include large and smaller submarine landslides with associated cliffs, faults, translational blocks, retrogressive failure, debrites and evacuation chutes. Sediment cover and areas devoid of cover together with cross-cutting relationships indicate a range in age and process. Other features include mud volcanoes indicating past and recent efflux of mud and fluids to the seabed on the upper slope, iceberg, sea-ice and floating glacier-driven seabed scour, influence by currents and/or past sea-level which limited and locally removed shelf-break glacial and post-glacial muds, incision of shelf-break canyons with differential sediment infill, seabed current-influenced distribution of recent muds derived ultimately from the Mackenzie River, influence on recent distribution of shelf-break muds by the Beaufort Jet, and finally structural disturbance of outermost shelf muds, probably related to degradation of permafrost and fluid migrations, forming mounds, collapses and associated basins.

Accoustic data was generated from the multibeam Kongsberg Simrad EM300 (2003-2008) and EM302 (2008-2016) multibeam sonar system onboard the CCGS Amundsen during ArcticNet Cruises. This bathymetric data subset covers the Canadian Arctic and includes all CCGS Amundsen's data. The datasets consist of high-resolution bathymetry and acoustic backscatter imagery collected 24 hours a day, whenever the ship was in transit or had dedicated survey time. Standard collection settings used dual-ping, FM pulse, auto depth mode, angular coverage of +/- 60 degrees and high density equidistant beam forming. The SIS software was used to collect the data. From 2003-2013, near realtime cleaning of data outliers was done using the Ocean Mapping Group's Swathed toolkit after conversion to OMG binary format. After 2014, the data cleaning was done in the CARIS HIPS&SIPS software. Data was exported in Generic Sensor Format (.gsf). IMU data was parsed by SIS from a POSMv 320 v.4. RTG GPS data from the CNAV 3050 GNSS receiver was used to correct and improve the position output from the POSMV via a RTCM correction protocol. Soundspeed information was either from CTD Rosette casts, MVP300 data or simulated from the World Ocean Atlas 2009 database. Data are gridded at a resolution of 10 metres. Grid files available are in binary floating point file (.flt). The grids will be available shortly on the Université Laval library's geospatial center website (www.geoindex-plus.bibl.ulaval.ca/). Note: The OMG of University of New Brunswick were responsible for 2003-2013 data (www.omg.unb.ca/Projects). From 2014, responsibility switched to the Marine Geoscience Laboratory At Université Laval (www.lgm.ggr.ulaval.ca/index.php/projets/amundsen/).