Statistical Areas Level 1

Statistical Areas Level 1 (SA1s) are geographic areas built from whole Mesh Blocks. Whole SA1s aggregate to form Statistical Areas Level 2 (SA2s). SA1s are designed to maximise the geographic detail available for Census of Population and Housing data. However, limited Census of Population and Housing data may also be available at the Mesh Block level for ASGS Edition 3.\r\n\r\nThere are 61,845 SA1 regions covering the whole of Australia without gaps or overlaps. This includes 34 non-spatial special purpose codes including a new Outside Australia code. These non-spatial SA1s represent populations that are difficult to define geographically such as people who are in transit or have no fixed address. Examples include the Migratory and No Usual Address SA1s.\r\n\r\nSA1s are also used as the building blocks for some ASGS geographies, including the Indigenous Structure, Significant Urban Areas, Urban Centres and Localities, Section of State Structure, and the Remoteness Structure.\r\n\r\nIn WGS84 CRS.