Mesh Blocks are a new micro level of statistical geography for Australia. They were first published in draft form in September 2005. In July 2006 they became the smallest unit of the ASGC. Mesh Blocks are about four or five times smaller than CDs but do not necessarily aggregate to CD. They do aggregate precisely to SLAs. The minimum number of dwellings in each Mesh Block will be between 20 and 50 except where a Mesh Block is deliberately designed to have zero population.
Mesh Blocks will be small so that they can aggregate reasonably accurately to many different geographical regions, administrative, management and political boundaries. Thus, by coding statistics to Mesh Blocks, it will be possible to produce summary statistics for a whole range of geographical regions not currently represented in statistical geography. For further information see Information Paper: Draft Mesh Blocks, Australia, 2005 (cat. no. 1209.0.55.001).