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What are standard ABS geographies?
Understand the ABS geographic boundaries used in Placemaker, including SA1, SA2, SA3, SA4, LGA and GCC, and how they affect data aggregation.
The Australian Bureau of Statistics (ABS) uses a consistent set of standard geographic areas to report data across Australia. These areas are defined in the Australian Statistical Geography Standard (ASGS), and Placemaker uses them to display and aggregate forecast data. Understanding them helps you read forecast results at the right level.
Key Concepts
The Australian Statistical Geography Standard (ASGS)
The ASGS is the ABS framework that divides Australia into a nested hierarchy of standard areas. The boundaries stay consistent and stable between releases, so you can compare data for one area against another and track it over time. The ABS updates the ASGS every five years, aligned with the census.
The ABS geographic hierarchy
ABS geographies nest within each other from the smallest to the largest:
| Geography | Full name | Typical population | Notes |
|---|---|---|---|
| SA1 | Statistical Area Level 1 | 200 – 800 | Smallest ABS statistical unit. Designed for Census data release and fine-grained spatial analysis. |
| SA2 | Statistical Area Level 2 | 3,000 – 25,000 | Core unit for analysing communities. Represents suburbs or groups of suburbs. |
| SA3 | Statistical Area Level 3 | 30,000 – 130,000 | Groups of SA2s representing regional areas or functional regions. |
| SA4 | Statistical Area Level 4 | 100,000 – 500,000 | Large regions aligned to labour markets. |
| LGA | Local Government Area | Varies | Administrative areas defined by local councils. |
| GCC | Greater Capital City Statistical Area | Varies | Defines the functional extent of each capital city. |
| SAL | Suburbs and Localities | Varies | Official suburb/locality boundaries. |
SA1 as the primary unit in Placemaker
Placemaker displays forecast data at SA1, SA2, SA3, SA4, SAL, LGA, GCCSA and State level. SA1 areas represent the smallest communities for planning, so you can build up a catchment that meets your needs.
Why geography matters for catchments
When you create a catchment in Placemaker, the platform intersects your catchment boundary with the underlying SA1 areas. Placemaker then aggregates population and dwelling forecast data for the SA1 areas that fall within or overlap the catchment.
How This Applies in Placemaker
The map in Placemaker displays SA1 boundaries. Clicking on an SA1 area shows its forecast data. Catchment insights aggregate data across the SA1 areas within the catchment boundary.
Frequently Asked Questions
Q: Can I see data at the suburb level?
A: Yes. You can view forecast data at Suburbs and Localities (SAL) level on the map. SA2 areas also broadly correspond to suburbs, though they aren't identical.
Q: Can I view data by LGA?
A: Yes. Placemaker supports SA3, LGA, Suburbs and Localities (SAL) and Greater Capital City Statistical Areas (GCCSA), in addition to SA1, SA2, SA4 and state.
Q: Why use ABS geographies instead of suburbs or council areas?
A: ABS geographies stay consistent and stable across the country, which makes data comparable between areas and over time. Suburbs and local government areas can change and vary widely in size. Many ABS geographies still align closely with suburbs and local areas.
Q: Where do ABS boundaries come from, and do they change?
A: The ABS defines and maintains the boundaries as part of the Australian Statistical Geography Standard (ASGS). The ABS reviews them every five years, aligned with the census, so most boundaries stay stable between reviews.