At present, two international initiatives are compiling polar bathymetric data for use in construction of seafloor topography. These are the ocean mapping groups on the International Bathymetric Chart of the Arctic Ocean (IBCAO) and the International Bathymetric Chart of the Southern Ocean (IBCSO). The IBCSO group focuses on the buildup of an updated digital bathymetric database for the entire Southern Ocean with additional data derived from radar satellite imagery, altimetry, magnetic, and gravity. Data sets are provided by a great number of facilities and data centers. Data management and data processing is conducted by use of proprietary Geographic Information Systems (GIS). This approach assures interoperability for data exchange and allows production of cartographic paper products and digital web maps.