b8143952-421c-4544-8437-58f339253d30 eng utf8 dataset dataset NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom polardatacentre@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact 2015-03-02 ISO 19115 Geographic Information - Metadata ISO 19115:2003(E) European Petroleum Survey Group (EPSG) Geodetic Parameter Registry 2008-11-12 publication European Petroleum Survey Group EPSGadministrator@iogp.org https://www.epsg-registry.org/ EPSG Geodetic Parameter Dataset The EPSG Geodetic Parameter Dataset is a structured dataset of Coordinate Reference Systems and Coordinate Transformations, accessible through this online registry. information publisher urn:ogc:def:crs:EPSG::3031 6.18.3 A bathymetric and topographic compilation of the South Sandwich Island Volcanic Arc 2015-03-02 creation 2015-03-02 revision 2015-03-02 publication 2015-03-02 released None https://doi.org/10.5285/b8143952-421c-4544-8437-58f339253d30 doi GB/NERC/BAS/PDC/00812 https://data.bas.ac.uk/ Please cite this item as: Fretwell, P. (2015). A bathymetric and topographic compilation of the South Sandwich Island Volcanic Arc (Version None) [Data set]. Polar Data Centre; British Antarctic Survey, Natural Environment Research Council; Cambridge, CB3 0ET, UK.. https://doi.org/10.5285/b8143952-421c-4544-8437-58f339253d30 A bathymetric and topographic compilation of the South Sandwich Islands Volcanic Arc (55.1 S - 61.9 S, 24 W - 32 W) constructed in 2014, comprising multiple data sources (see lineage). The data are available as a 200m resolution GeoTIFF grid of elevation data. The bathymetric compilation was constructed in ArcGIS 10.0 using a hierarchical system of data priority, gridded using the Topogrid function and cleaned using both manual and semi-automated methods. This was then merged with terrestrial elevations constructed from cleaned raw ASTER GDEM grids supplemented by coastlines and form-lines taken from archival sketch-maps to produce a full hypsometric elevation model. The dataset was compiled as part of the Geological Long Term Mapping and Survey component of the British Antarctic Survey and forms the basis of a map within the BAS GEOMAP 2 series (see references). No credit. completed Tate, Alexander British Antarctic Survey Researcher author Leat, Philip British Antarctic Survey Researcher author Fretwell, Peter British Antarctic Survey Researcher author Larter, Robert British Antarctic Survey Researcher author Smellie, John University of Leicester Researcher author Martin, Tara CSIRO Oceans and Atmosphere Flagship Researcher author Jokat, Wilfried Alfred Wegener Institute Helmholtz Center for Polar and Marine Research Researcher author Bohrmann, Gerhard MARUM Center for Marine Environmental Sciences Researcher author NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact asNeeded completed EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Bathymetry EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Seamounts EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Trenches EARTH SCIENCE > Oceans > Marine Volcanism > Island Arcs EARTH SCIENCE > Solid Earth > Seismology > Earthquake Occurrences EARTH SCIENCE > Land Surface > Topography theme Global Change Master Directory (GCMD) Science Keywords 2026-01-27 publication 23 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) Greenbelt MD United States of America https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher Elevation Bathymetry and Elevation theme Sea Floor South Sandwich Islands Scotia Sea Southern Ocean Land Surface place Elevation Oceanographic geographical features Geology Land cover theme GEMET - INSPIRE themes, version 1.0 2021-01-06 revision otherRestrictions no limitations to public access otherRestrictions no limitations license Open Government Licence v3.0 otherRestrictions Data released under the Open Government Licence V3.0 : url url crossReference textTable eng utf8 elevation geoscientificInformation oceans -32.0 -24.0 -61.9 -55.1 It is recommended that careful attention be paid to the contents of any data, and that the author be contacted with any questions regarding appropriate use. If you find any errors or omissions, please report them to polardatacentre@bas.ac.uk. NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information distributor bytes 1 https://ramadda.data.bas.ac.uk/repository/entry/show/?entryid=b8143952-421c-4544-8437-58f339253d30 WWW:LINK-1.0-http--link Get Data Download data download dataset Methodology: The bathymetry map was compiled from a variety of different data sources. The primary data are multibeam swath bathymetry collected from scientific cruises undertaken by British Antarctic Survey (BAS), Alfred Wegener Institute (AWI) and Center for Marine and Environmental Sciences (MARUM), University of Bremen. This is supplemented by older data from a BAS towed sonar survey (MR1) and single-beam data collected by previous BAS ships and commercial fishing vessels. Where no data existed from these sources, global compilations from the General Bathymetric Chart of the Oceans (GEBCO) and, below 60 South, the International Bathymetric Chart of the Southern Ocean (IBCSO) were used; both these data sets use satellite altimetry in areas where data are sparse. The new digital elevation model was gridded in a similar way to previous grids (Fretwell et al. 2008, Dickens et al. 2014). Gridded datasets were resampled to 200 m resolution and then converted to point data. These points were then given a quality hierarchy; multibeam swath being the highest, then towed data, singlebeam and finally gridded GEBCO and IBSCO data. The data were then re-gridded using the Topogrid algorithm in ArcGIS using the hierarchy to prioritize the data. The resulting grid was then checked for errors such as spikes and holes. Where identified, these were removed from the point datasets and the data were re-gridded. This iterative process was conducted until a clean combined dataset was produced. On land raw ASTER GDEM grids were cleaned and merged with pre-existing survey data to create new digital elevation models and supplemented by coastlines and form-lines taken from archival sketch-maps to produce a full hypsometric elevation model for each island. The bathymetry and elevation dataset was merged and gridded using ArcGIS 10. Data collection: The bathymetric compilation was constructed in ArcGIS 10.0 using a hierarchical system of data priority, gridded using the Topogrid function and cleaned using both manual and semi-automated methods. This was then merged with terrestrial elevations constructed from cleaned raw ASTER GDEM grids supplemented by coastlines and form-lines taken from archival sketch-maps to produce a full hypsometric elevation model. Data sources and hierarchy 1. BAS multibeam 2. AWI multibeam 3. MARUM multibeam 4. ASTER gdem 5. Coastline vector data 6. BAS MR1 towed 7. Fisheries singlebeam 8. BAS single beam 9. IBSCO gridded data 10. GEBCO gridded data asNeeded completed