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1216.0 - Australian Standard Geographical Classification (ASGC), 2001  
Previous ISSUE Released at 11:30 AM (CANBERRA TIME) 28/09/2001   
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PURPOSE

The LGA Structure shows the relationship between LGAs and SLAs. This relationship can be one LGA to one SLA or one LGA to many SLAs.

The LGA Structure is maintained as a separate structure from the Main Structure because:

  • unlike spatial units in the Main Structure, LGAs do not cover the whole of Australia; and
  • unlike SLAs which aggregate to form SSDs and SDs, some LGAs do not wholly fit within an SSD and an SD (e.g. Gold Coast City in Queensland).

THE STRUCTURE

Incorporated areas only

The LGA Structure covers only incorporated areas of Australia. Incorporated areas are legally designated areas over which incorporated local governments have responsibility. The major areas of Australia not covered by incorporated bodies are the northern parts of South Australia, most of the Northern Territory and all of the Australian Capital Territory and the Other Territories.

The LGA Structure has four levels of hierarchy in Population Census years, comprising in ascending order: CDs-SLAs-LGAs-S/Ts (Incorporated Areas). In non-census years, with CDs undefined, it has only three levels of hierarchy. The spatial units in each level relate to the spatial units in other levels through aggregation or disaggregation. For example, CDs aggregate to SLAs while SLAs are disaggregates of LGAs. The spatial units within each level collectively cover only the ‘incorporated’ areas of Australia.

LGAs included in the structure

LGAs are proclaimed by various State government authorities and are gazetted throughout the year. Presently, LGAs are used as the base on which SLAs are defined for the ASGC. Because this definition process takes time, LGAs gazetted during the year leading up to an ASGC edition cannot always be processed in time for inclusion in that edition. For instance, complex LGA changes which result in complicated redesign of SLAs, or changes gazetted too close to the effective date of 1 July of an ASGC edition, may sometimes have to be included in a later edition.

Table

The current LGA Structure, down to SLA level, is shown in the table - Alphabetic List of LGAs and SLAs within States/Territories - in Chapter 13.

Example:

S/T
SD
SSD
LGA
SLA
LGA/SLA name
1
0850
Blayney (A)
1
40
05
0851
Blayney (A) - Pt A
1
40
10
0852
Blayney (A) - Pt B

Note that there is no SD or SSD code for the LGA because LGAs are not part of the Main Structure. This table also shows SLAs which cover unincorporated areas and are therefore not part of the LGA Structure.

Example:

S/T
SD
SSD
LGA
SLA
LGA/SLA name
1
60
10
8809
Unincorp. Far West



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