Gregory's Server@Dangerous_beans @xssfox It’s strictly many to one, and has been for 20 years or so. There are two caveats though which may mean technical documents have to permit many to many to cater for a) not all postcodes are geographic - ie they can be allocated to PO boxe suites or large mail receivers and some may want to record their geo location and b) one political exception (Locality of Melbourne has 2 geo postcodes 3000 and 3004)
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 @Dangerous_beans @xssfox Locality is a formally defined construct that represents a geographically bounded area. Localities are maintained by the varies State lands Authorities and they define the address of all land parcels contained within. Australia Post define geographic postcodes in terms of the Localities they serve, and they adopt the boundaries precisely.  @railmaps @xssfox ah, it's state level. i can't find a list to check, the free publication on auspost isn't much use here @Dangerous_beans @xssfox It’s possible. Localities come from a lands management and surveying background, not from a stats background. Geoscience Australia do act as a national umbrella group for all the State lands data, and the States do coordinate and standardise pretty well with each other on this. This might be useful https://www.ga.gov.au/scientific-topics/national-location-information/nationalmap |
@railmaps @xssfox what do we mean by locality here? it might be something i haven't worked with (i've mostly done geographical stuff for demographics, so a lot of ABS data)