Date (Creation)

2015-03-02

Date (Revision)

2015-03-02

Date (Publication)

2015-03-02

Date (released)

2015-03-02

Edition

None

Unique resource identifier

https://doi.org/10.5285/b8143952-421c-4544-8437-58f339253d30

Codespace

doi

Unique resource identifier

GB/NERC/BAS/PDC/00812

Codespace

https://data.bas.ac.uk/

Other citation details

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

Credit

No credit.

Status

Completed

Point of contact

Organisation name	Individual name	Electronic mail address	Role
British Antarctic Survey	Tate, Alexander		Author
British Antarctic Survey	Leat, Philip		Author
British Antarctic Survey	Fretwell, Peter		Author
British Antarctic Survey	Larter, Robert		Author
University of Leicester	Smellie, John		Author
CSIRO Oceans and Atmosphere Flagship	Martin, Tara		Author
Alfred Wegener Institute Helmholtz Center for Polar and Marine Research	Jokat, Wilfried		Author
MARUM Center for Marine Environmental Sciences	Bohrmann, Gerhard		Author
NERC EDS UK Polar Data Centre		PDCServiceDesk@bas.ac.uk	Point of contact

Maintenance and update frequency

As needed

Maintenance note

Completed

Global Change Master Directory (GCMD) Science Keywords

• 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

• Elevation

• Bathymetry and Elevation

Place

• Sea Floor

• South Sandwich Islands

• Scotia Sea Southern Ocean

• Land Surface

GEMET - INSPIRE themes, version 1.0

• Elevation
• Oceanographic geographical features
• Geology
• Land cover

Access constraints

Other restrictions

Other constraints

no limitations to public access

Access constraints

Other restrictions

Other constraints

no limitations

Use constraints

License

Other constraints

Open Government Licence v3.0

Use constraints

Other restrictions

Other constraints

Data released under the Open Government Licence V3.0 :

Unique resource identifier

url

Codespace

url

Association Type

Cross reference

Spatial representation type

Text, table

Language

English

Character set

UTF8

Topic category

• Elevation
• Geoscientific information
• Oceans

Supplemental Information

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.

Title

European Petroleum Survey Group (EPSG) Geodetic Parameter Registry

Date (Publication)

2008-11-12

Cited responsible party

Organisation name	Individual name	Electronic mail address	Role
European Petroleum Survey Group		EPSGadministrator@iogp.org	Publisher

Unique resource identifier

urn:ogc:def:crs:EPSG::3031

Version

6.18.3

Hierarchy level

Dataset

Statement

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

Metadata

File identifier

b8143952-421c-4544-8437-58f339253d30 XML

Metadata language

English

Character set

UTF8

Hierarchy level

Dataset

Hierarchy level name

dataset

Date stamp

2015-03-02

Metadata standard name

ISO 19115 Geographic Information - Metadata

Metadata standard version

ISO 19115:2003(E)

Metadata author

Organisation name	Individual name	Electronic mail address	Role
NERC EDS UK Polar Data Centre		polardatacentre@bas.ac.uk	Point of contact