Cartesian with a cell size of 2. Please use the online store for all orders within the USA. The poster size is 42 x 52 inches. Bathymetry in the Gulf of Bothnia was derived from a compilation by Seifert and Kayser. The resulting grid was exported to Intergraph. 
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These grids, along with detailed descriptions of their formats and the techniques employed in their preparation, can be downloaded.
On the continental shelf adjacent to Siberia, soundings were extracted from a suite of navigational charts published by the Russian Federation Navy, and used to develop contours. Initiated inthis undertaking has so far engaged the volunteer efforts of investigators who are affiliated with eleven institutions in eight countries: Suspicious soundings were removed and, where contours showed major discrepancies with soundings, the contours were adjusted manually to agree with trackline data.
This process was repeated until the results were judged to be satisfactory. The poster size is 42 x 52 inches.
Cartesian with a cell size of 2. The locations of these data sets are shown in separate source distribution maps, while data contributors and relevant references are listed in this legend under "Data Contributions".
Outliers, cross-track errors, and the fit obcao isobaths and original observation data were checked. Please use the online store for all orders within the USA.
IBCAO – The International Bathymetric Chart of the Arctic Ocean - Department of Geological Sciences
The goal of IBCAO is to develop a digital data base that contains all available bathymetric data north of 64 degrees North, for use by mapmakers, researchers, and others whose work requires a detailed and acurate knowledge of the depth and the shape of the Arctic seabed. Bathymetry in the Gulf of Bothnia was derived from a ibccao by Seifert and Kayser.
The grid that was used for the construction of the map can be obtained in two forms: The data were then regridded ibczo reinspected for residual discrepancies. The information used in the construction of this database and map consist of: In the central Arctic Ocean, original observations were augmented with contour information derived from a map published by the Russian Federation Navy.
The resulting grid was exported to Intergraph. Initially, the data sets were preprocessed with the GMT block-median filter, after which they were gridded at a cell size of 2. Although extensive, in some areas the database of digital trackline and spot observations contained critical gaps that had to be augmented with information that was only available on paper maps and charts.
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