IMAS Metadata Catalogue
Geomorphic Features 2006
The data set provides outlines for the maximum extent of geomorphic units for Australia's Exclusive Economic Zone, including the offshore island territories, but not the Australian Antarctic Territory. These data were compiled as part of Geoscience Australia's integrated digital information system to provide improved accessibility and knowledge relating to the environmental management of Australia's oceans resources. The geomorphic units are to be used as surrogates for benthic habitats and can be best applied to the construction of bioregionalisations of the seabed. The data set also includes the name of units in the attribute table, where known, the source(s) of the names, feature codes and province codes as well as the area and perimeter of each unit. The data are accompanied by Geoscience Australia Record 2003/30. Updated October 2006.
Simple
Identification info
- Alternate title
- Geomorphic Features of the Australian Margin (National Geoscience Dataset)
- Date (Creation)
- 2006-10-01T00:00:00
- Date (Publication)
- 2017-09-29
- Citation identifier
-
http://pid.geoscience.gov.au/dataset/ga/69797
Author
Commonwealth of Australia (Geoscience Australia) - Heap, A.
Author
Commonwealth of Australia (Geoscience Australia) - Harris, P.
Author
Commonwealth of Australia (Geoscience Australia) - Sbaffi, L.
Author
Commonwealth of Australia (Geoscience Australia) - Passlow, V.
Author
Commonwealth of Australia (Geoscience Australia) - Fellows, M.
Author
Commonwealth of Australia (Geoscience Australia) - Daniell, J.
Author
Commonwealth of Australia (Geoscience Australia) - Buchanan, C.
- Status
- Completed
Owner
Commonwealth of Australia (Geoscience Australia)
Custodian
Commonwealth of Australia (Geoscience Australia) - Petroleum and Marine Division Project Data Officer
GPO Box 378
Canberra
Australian Capital Territory
2601
Australia
Spatial resolution
Equivalent scale
- Denominator
- 500000
- Topic category
-
- Geoscientific information
Extent
N
S
E
W
))
- Maintenance and update frequency
- As needed
- Region
-
- AUSTRALIA EXCLUDING EXTERNAL TERRITORIES
- Keywords (Theme)
-
- geosciences
- geomorphology
- marine mapping
- national dataset
- earth sciences
- GCMD Keywords, Version 8.5
- Keywords (Theme)
-
- Benthic geomorphic habitat
- Benthic habitat
Resource specific usage
- Specific usage
- Data supplied for use by the Seamap Australia Project.
- ()
Resource constraints
- Classification
- Unclassified
Resource constraints
- Linkage
-
http://i.creativecommons.org/l/by/4.0/88x31.png
License Graphic
- Title
- Creative Commons Attribution 4.0 International License
- Website
-
http://creativecommons.org/licenses/by/4.0/
License Text
- Other constraints
- Cite data as: Heap A, Harris P, Sbaffi L, Passlow V, Fellows M, Daniell J, Buchanan, C (2006). Geomorphic Features 2006. Geoscience Australia (GA). Data accessed at http://metadata.imas.utas.edu.au/geonetwork/srv/en/metadata.show?uuid=a05f7892-eeab-7506-e044-00144fdd4fa6 on (access date).
- Other constraints
- This dataset is hosted by the Institute for Marine and Antarctic Studies (IMAS), University of Tasmania, on behalf of the Geoscience Australia (GA), Australian Government for the purposes of Seamap Australia (testing a national marine benthic habitat classification scheme).
- Language
- English
- Character encoding
- UTF8
Content Information
- Content type
- Physical measurement
- Name
-
Benthic geomorphic habitat
- Description
- Appended to original data for styling purposes for the Seamap Australia Project.
- Name
-
Benthic habitat
- Name
-
SM_HAB_CLS
Distribution Information
- Distribution format
-
-
ESRI Shapefile
-
ESRI Shapefile
- OnLine resource
-
SHAPE-ZIP
DATA ACCESS - This OGC WFS service returns the data (Geomorphic Features of Australia's margin) in Shapefile format.
- OnLine resource
-
seamap:SeamapAus_NAT_Aus_margin_geomorph_2006
MAP - Geomorphic Features of Australia's margin
- OnLine resource
-
Original metadata record [GA Catalogue]
Data quality info
- Hierarchy level
- Dataset
Report
- Measure description
- Positional accuracy of individual geomorphic features boundaries varies depending on the source data. Due to the scale of the map, and quality of the source, the smallest feature that could be reliably resolved was approximately 10 sq km.
Report
- Measure description
- No attribute for data quality exists at this stage. This attribute will be updated once a reliability map for the source bathymetric data has been generated. The reliability map will be based on the spatial distribution of soundings.
Report
- Measure description
- All bathymetric datasets once reduced to 9 x 250 m grids for the Australia EEZ were examined visually for data consistency. In some circumstances individual datasets were identified as inconsistent within the grid and either left out of the final grid or were corrected. Terms and nomenclature used to describe geomorphic features of the seabed are based on definitions endorsed by the International Hydrographic Organisation (IHO, 2001). Adopting ISO terms ensures a standard nomenclature that is widely recognised. Regional data sets were then compiled as a single national coverage. Tests were also carried out on the data for completeness, correct spatial representation, attribute accuracy, and logical consistency and correctness.
Report
- Measure description
- Coverage: The geomorphic units cover 100% of the Australia Exclusive Economic Zone. The raw data that makes up the bathymetry grid is derived from numerous sources and has been obtained opportunistically hence the actual data coverage is generally patchy and irregular. A data density map for the bathymetry grids has not yet been produced.
Resource lineage
- Statement
- The geomorphic features were captured in 2002 as part of a program run by Geoscience Australia and the National Oceans office to create a spatial inventory of benthic habitats for Australia's marine jurisdiction. The geomorphic features are defined by the International Hydrographic Office (IHO, 2001), and were identified using a 250Â m spatial resolution bathymetry model with reference to previously published geological studies. In most cases, the feature boundaries corresponded to already published boundaries or were defined based on obvious bathymetric features, supplemented by high-resolution seismic reflection and sedimentary data. Where appropriate, the feature boundaries and classifications are consistent with United Nations Law of the Sea boundaries. The identification of shelf valleys and submarine canyons on the continental slope was aided by the use of predicted drainage maps. All the features were identified on the contour and false colour maps and drawn by hand onto transparent compilation maps. When completed, the compilation maps were scanned, georeferenced and the separate polygons were digitised and stored as an ARC/GIS shape file. Care was taken where separate maps sheets joined to ensure that features were correctly identified and retained their identity across the boundaries.
- Hierarchy level
- Dataset
Resource lineage
- Statement
- Classification: A total of 21 separate categories of geomorphic feature were selected for mapping (IHO, 2001). A category for sandwaves and sand banks were also included to capture important geomorphic features on the shelf. Terms and nomenclature used to describe geomorphic features of the seabed are based on definitions endorsed by the International Hydrographic Organisation (IHO, 2001). Further details of these terms and documentation underlying their adoption by IHO may be found at the following internet address: http://www.iho.shom.fr/publicat/free/files/B6efEd3.pdf for complete IHO documentation (IHO, 2001). Due to the often sparse nature of the bathymetric data and the coarse resolution of the maps some features in the geomorphic units map were identified through a literature search and not directly from the bathymetry grids. This was often the case for features such as sandwaves on the shelf, which occur on a scale to small to be resolved within the 250 m bathymetry grid. Verification: Field verification was limited to reviewing published literature of prominent marine features within the Australian EEZ.
- Hierarchy level
- Attribute
Reference System Information
- Reference system identifier
-
WGS84 / EPSG:4326
- Hierarchy level
- Dataset
Platform
Identifier
- Code
- research vessel
Metadata
- Metadata identifier
-
a05f7892-eeab-7506-e044-00144fdd4fa6
- Language
- English
- Character encoding
- UTF8
Point of contact
- Parent metadata
Type of resource
- Resource scope
- Dataset
- Metadata linkage
-
https://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/a05f7892-eeab-7506-e044-00144fdd4fa6
Point of truth URL of this metadata record
- Date info (Creation)
- 2020-09-23T12:25:03
- Date info (Revision)
- 2020-09-23T12:25:03
Metadata standard
- Title
- ISO 19115-3:2018
Overviews
Spatial extent
N
S
E
W
Provided by
Associated resources
Not available