Authors / CoAuthors
Unknown
Abstract
The data set provides outlines for the maximum extent of the Primary Bathymetric Units (geomorphic provinces) of Australia's Exclusive Economic Zone for regions beyond the shelf break (i.e., slope, rise, abyssal plain/deep ocean floor), including the offshore island territories but not the Australian Antarctic Territory. The slope is 4,059,760 km2 (45.02% of the EEZ), rise 97,070 km2 (1.08%), and abyssal plain/deep ocean floor 2,884,590 km2 (31.99%). These data were compiled in 2004 as part of the draft national benthic marine bioregionalisation which is designed to provide improved knowledge of Australia's seabed. The Primary Bathymetric Units represent regional-scale bathymetric features and faunal distributions. The dataset includes the names of units in the attribute table as well as the area and perimeter of each unit.
Product Type
dataset
eCat Id
77170
Contact for the resource
Custodian
Point of contact
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Keywords
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- GIS Dataset
- ( Theme )
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- marine
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_Internal
Publication Date
2013-08-21T00:00:00
Creation Date
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Status
Purpose
Maintenance Information
asNeeded
Topic Category
geoscientificInformation
Series Information
Lineage
The Primary Bathymetric Units were originally captured as geomorphic provinces in 2002 as part of a program run by Geoscience Australia and the National Oceans Office to create a spatial inventory of large-scale benthic biogeographical regions for Australia's Exclusive Economic Zone (Harris et al., 2005). The Primary Bathymetric Units are thus defined by the International Hydrographic Office (IHO, 2002), and were identified using a 250 m spatial resolution bathymetry model with reference to previously published geological studies. In most places, the boundaries between the geomorphic provinces corresponded to already published boundaries or were defined by morphology or by seismic reflection and sedimentary data. The Primary Bathymetric Units were identified on contour and false colour maps and drawn by hand onto transparent compilation maps. When completed, the compilation maps were scanned, geo-referenced and the separate polygons were digitised and stored as an ARC/GIS shape file. Care was taken where separate sheets joined to ensure that the units were correctly identified and retained their identity across the sheet boundaries.
Parent Information
Extents
[-55.0, -9.0, 90.0, 175.0]
Reference System
Spatial Resolution
Service Information
Associations
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Source Information
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