4bd20a2b-df7d-46a2-acdf-5104c82ff4c7 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 2020-10-22 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 High resolution vector contours for Antarctica - VERSION 7.3 2020-10-22 creation 2020-10-22 revision 2020-10-22 publication 2020-10-22 released 7.3 https://doi.org/10.5285/4bd20a2b-df7d-46a2-acdf-5104c82ff4c7 doi GB/NERC/BAS/PDC/01425 https://data.bas.ac.uk/ Please cite this item as: Gerrish, L. (2020). High resolution vector contours for Antarctica - VERSION 7.3 (Version 7.3) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/4bd20a2b-df7d-46a2-acdf-5104c82ff4c7 A continuous contour dataset at 100 m intervals for all land south of 60degS, excluding the Balleny Islands. The vertical datum of the contours is EGM2008. Contours are extracted primarily from the PGC Reference Elevation Model of Antarctica (REMA) v1.1 with certain islands filled from Copernicus WorldDEM. Further small areas are interpreted from satellite imagery, and Peter I Oy contours are from the Norwegian Polar Institute. Sources of individual line segments are contained in the attribute table and full compilation information is given in the lineage statement. Note: contours overlap the coastline in small areas, due to resolution of the data used in creation of the lines, and potential errors in coastline and/or contour data. Certain areas are known to contain erroneous data due to faults in the original DEM data. No credit. completed Gerrish, Laura British Antarctic Survey 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 > Land Surface > Topography > Contours 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 Antarctic Digital Database Elevation Topographic mapping theme Antarctica place Land cover theme GEMET - INSPIRE themes, version 1.0 2021-01-06 revision otherRestrictions no limitations to public access otherRestrictions no limitations license Creative Commons Attribution 4.0 International otherRestrictions This information is licensed under the Creative Commons Attribution 4.0 International Licence (CC BY 4.0). To view this licence, visit Please cite this item as: 'Gerrish, L., Fretwell, P., & Cooper, P. (2020). High resolution vector contours for Antarctica (7.3) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/571C967C-D007-45B3-B327-64D11CB496F4'. If using for a graphic or if short on space, please cite as 'data from the SCAR Antarctic Digital Database, accessed [year]' url url crossReference doi doi crossReference doi doi crossReference textTable eng utf8 environment geoscientificInformation -180.0 180.0 -90.0 -60.0 1993-01-01 2020-10-30 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 application/geopackage+sqlite3 application/xml bytes 1390411776 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=4bd20a2b-df7d-46a2-acdf-5104c82ff4c7 WWW:LINK-1.0-http--link Get Data Download data download bytes 1390411776 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=4bd20a2b-df7d-46a2-acdf-5104c82ff4c7 WWW:LINK-1.0-http--link Get Data Download data download dataset Methodology: All processing described here was performed in ArcGIS Pro version 2.6. A composite Digital Elevation Model (DEM) was created comprising of three datasets from the Reference Elevation Model of Antarctica v1.1: REMA_100m_peninsula_dem_filled, REMA_100m_dem and REMA_200m_dem_filled. These DEMs were first converted from ellipsoidal height to height above EGM2008 geoid and then mosaicked together in respective order at 100 m spatial resolution. This 100 m DEM was smoothed by performing Focal Statistics using a 3x3 cell size. 100 m contours were extracted and all contours with a height 1m were deleted, as well as erroneous offshore contours. All contour dangles were identified and then fixed to create a continuous dataset. They were fixed either by interpreting the correct line from satellite imagery or from Copernicus WorldDEM 90m contours. Such lines are attributed with interpreted in the source field and should be treated with caution. In other locations where the contours significantly overlapped the coastline, contours were redrawn/interpreted to not go offshore. In certain locations, primarily some islands on the Antarctic Peninsula, REMA data was insufficient to produce contours. In these places, contours were produced from the 'Copernicus WorldDEM 90m' DEM and smoothed by 300 m using a PAEK smoothing algorithm. Contours for Peter I Oy were incorporated from the Norwegian Polar Institute Data at 100 m intervals. The source of every line is written in the attribute table. All contours were merged together and lines 150 m in length were deleted. Further lines 1500 m were deleted in non-mountainous regions, so as to avoid deleting small mountain peak contours but to still simplify the main dataset. These regions were interpreted manually using the hillshade of the DEM used to produce the contours. asNeeded completed