Note: this dataset decsription is metadata (data about data) which describes the actual dataset in accordance with the ANZLIC Metadata Profile: An Australian/New Zealand Profile of AS/NZS ISO 19115:2005, Geographic information - Metadata.
Abstract:IBRA regions represent a landscape based approach to classifying the land surface of Australia from a range of continental data on environmental attributes. The dataset is derived from data and information provided from State and Territory Nature Conservation agencies regionalisations and aggregated to 80 biogeographic regions for Australia. These biogeographic regions have been delineated, each reflecting a unifying set of major environmental influences which shape the occurrence of flora and fauna and their interaction with the physical environment.
IBRA Version 4.1 is regarded as the best available GIS representation of the original IBRA Version 4.0 map presented in Thackway and Cresswell (1995). This product is occasionally referenced, for example, in the Determinations Threatened Species under the New South Wales (NSW) Threatened Species Conservation Act (1995).
PLEASE NOTE: IBRA 4.1 has been superseded by subsequent versions. For later IBRA versions or a full Australia wide coverage of IBRA 4.1 go to http://www.environment.gov.au/parks/nrs/science/bioregion-framework/ibra/index.html
Purpose:
Jurisdiction:NSW, Australia
Custodian organisation:Office of Environment and Heritage (OEH)
Lineage:The IBRA boundaries have varied mapping accuracy from a scale of 1:250 000 to 1:3 000 000. The compilation scale is 1:3 000 000 and should not be used for mapping finer than this scale. These data contain the biogeographic regions of Australia which were jointly defined by the State, Territory and Commonwealth nature conservation agencies. Some regions are at the scale of sub-regions or environmental provinces.
The minimum mapping unit is 2km x 2km
The coverage includes the AUSLIG 1:100 000 coastline with islands greater than approximately 2km x 2km and State and Territory borders.
For further information see: R Thackway and I D Cresswell, 1995 (Eds). "An Interim Biogeographic Regionalisation for Australia: a framework for establishing the national system of reserves, Version 4.0.", Australian Nature Conservation Agency, Canberra.
Scope:
Completeness commission:All polygons are correctly labelled.
Completeness omission:All polygons are correctly labelled.
Logical consistency - conceptual consistency:All polygons are correctly labelled
Logical consistency - topological consistency:
Positional accuracy:The minimum mapping unit is 2km x 2km
Generally in southern States and Territories it is accurate to 1:250,000
Attribute accuracy:The attributes include:
CONT_CODE: continental code from 1 - 80
REG: Region initials (generally 3 letters)
CONT_NAME: Region name in full. Polygons with no CONT_CODE are small islands.
ST_NAME: State name
ST_NUM: State number
RES_CODE: Reservation status
BIAS_CODE: bias
1 = Nil = All environments or land systems are represented in proportion to their occurrence
2 = Low = Most land systems are represented, but not in proportion to their occurrence
3 = Moderate = The land systems missed include some of the extensive ecosystems that characterise the region
4 = High = Entire sub-regions, or many of the extensive ecosystems that characterise the region, are missed
5 = No reserves = No reserves present within the IBRA region
AEZ_REG: ?
OLD_PRIORI: ?
MEAN: ?
ECO_INTEGR: Condition codes
A = Modified ecosystems dominant, ie. only small areas of indigenous ecosystems remain
L = Indigenous ecosystems present but coexisting with pastoral / timber industries
M = Indigenous ecosystems dominant with no widespread degrading land use, however processes of disturbance (feral pests, fire, tourism, etc) present
H = Indigenous ecosystems dominant with no known risk
ECO_INTE_1: Condition codes (as per above) converted to a number. M = 1, A = 2, L = 3
CMM: Conservation Management Measures. 1 = Land purchase (including purchase of pastoral leases), 2 = Voluntary Agreements (Heritage Agreements, Covenants, Regional Forestry Agreements, inter-governmental agreements), 3 = Planning instruments (eg. Changing various types of Crown Reserves such as Vacant Crown Land, and Recreation Reserves to nature conservation vesting and purposes)
CMM2: Alternate Conservation Management Measures. 1 = Land purchase (including purchase of pastoral leases), 2 = Voluntary Agreements (Heritage Agreements, Covenants, Regional Forestry Agreements, inter-governmental agreements), 3 = Planning instruments (eg. Changing various types of Crown Reserves such as Vacant Crown Land, and Recreation Reserves to nature conservation vesting and purposes)
CMM3: ?
COND: ?
ECO_GAPS: ?
ECO_DEG: ?
NEW_PRIO97: Priorities for filling the gaps in the NRS
1 = Priority 1 = No reserves or low reservation status; ni reserves and/or high bias, and; threatened by current land use management activities
2 = Priority 2 = low to moderate reservation status; high to moderate bias, and; threatened by current land use management activities
3 = Priority 3 = moderate to high reservation status; moderate to low bias, and; threatened by current land use management activities
Source: R Thackway and I D Cresswell, 1995 (Eds). "An Interim Biogeographic Regionalisation for Australia: a framework for establishing the national system of reserves, Version 4.0.", Australian Nature Conservation Agency, Canberra.
Metadata standard name:ANZLIC Metadata Profile: An Australian/New Zealand Profile of AS/NZS ISO 19115:2005, Geographic information - Metadata Metadata standard version:1.1