Main Structure and Greater Capital City Statistical Areas

The Main Structure of the Australian Statistical Geography Standard (ASGS) is developed by the ABS to release and analyse a broad range of social, demographic and economic statistics. It is also widely used by other organisations. The structure is broadly based on the concept of a functional area within which many people commute or travel to access services.

The structure has seven hierarchical levels listed below in descending order:

• Australia (AUS)
• States and Territories (S/T)
• Statistical Areas Level 4 (SA4)
• Statistical Areas Level 3 (SA3)
• Statistical Areas Level 2 (SA2)
• Statistical Areas Level 1 (SA1)
• Mesh Blocks (MB)

Each level directly aggregates to the level above. For example, SA1s are aggregates of Mesh Blocks and they in turn aggregate to SA2s. This principle continues up through the remaining levels of the hierarchy. At each hierarchical level, all of Geographic Australia is covered without gaps or overlaps.

The Greater Capital City Statistical Areas (GCCSA) Structure is also designed to represent functional areas of each of the 8 state and territory capital cities.

For ASGS Edition 4, the number of records within each geography by state and territory, and Australia wide, is shown below.