Objectives of the Bathymetry Challenge are to:
- Identify sea basin water depth with certainty, where possible;
- Identify areas where water depths are not able to be identified with certainty, due either to a lack of bathymetric data or to the low quality of data available; and
- Identify priority areas for further surveying to ensure safer vessel navigation, for both existing and future navigational needs.
Activities include the gathering and integration of available datasets and mapping coverages, including bathymetric and shipping data from European and national databases; EMODnet portals; SeaDataNet; Copernicus marine service; ACCESS; ICES; NOAA National Geophysical Data Center; Marine Cadastre; Geographic Information Network of Alaska; Bureau of Ocean Energy Management; USGS Alaska Geospatial Data Committee; US Coast Guard; National Weather Service; and European Marine Observation and Data Network.
A desktop internet search was completed to determine the availability of Geographic Information Systems (GIS) for bathymetric data available for the Arctic. Research found that high resolution processed data was quite limited in the public domain. However, the National Oceanic and Atmospheric Administration (NOAA) and associated agencies do provide a large variety of Web Map Services (WMS) that allow the user to pinpoint available unprocessed surveys for areas of interest. Two datasets were found compiled by UNH/CCOM-JJHC, Law of the Sea data that have processed NOAA multibeam bathymetric surveys.
Data reviewed thus far identifies provide information on water depths for the areas indicated in the GIS mapping generated by this data. In a number of areas this data has been processed for viewing in WMS format, other areas remain unprocessed for viewing in WMS but are indicated in the GIS mapping produced for this Challenge. Several datasets provide a comprehensive bathymetric basemap for the Arctic; however, these data have various limitations based on the intended purpose: for example, the IBCAO has a 500-meter spacing, which is too sparse for navigational use in many instances. These datasets may be useful for both mapping and more generalized analysis.
Data provided in WMS format
- NOAA Marine Trackline Data showing all survey transects
- NOAA Multibeam Bathymetry Surveys
- NOAA Ocean Services (NOS) Hydrographic Surveys
- Global Relief Model (ETOPO1)
- Digital Elevation Model Footprints
- Global Relief Model (GEBCO008), Shaded Relief Visualization
Data provided by UNH/CCOM
- The data location was provided for this not available in WMS.
- Arctic Multibeam Compilation (v1.0)
A new high-resolution multibeam bathymetry compilation for the Canada Basin and Chukchi Borderland in the Arctic Ocean - United States Arctic Multibeam Compilation (USAMBC Version 1.0). This compilation is created from multibeam data available through public repositories, preserving their native resolution and allowing for more detailed interpretation of sea floor morphology than currently possible with other large-scale compilations. Much of the new data was collected through dedicated mapping cruises in support of the United States effort to map extended continental shelf regions beyond the 200 nm Exclusive Economic Zone. Data quality was evaluated using nadir beam crossover error statistics, and compiled into a high-resolution grid through a weighted vertical stacking algorithm. Both the gridded compilation and an easily-distributed PDF is freely available through the University of New Hampshire's Center for Coastal and Ocean Mapping (http://ccom.unh.edu/theme/law-sea).
These datasets provide information on where water depth information exists for the study area, and where information is as of yet not available. While sufficient for general research and interest, the data is insufficiently granular to be used for navigation. Continuing efforts of this Challenge are assembling available navigational track information for analysis in relation to the known water depths to identify priority areas for further surveying to ensure safer vessel navigation.
Photo: Martine van den Heuvel-Greve