Slightly different issue… but the accuracy of governmental admin boundaries can
vary a lot depending where you are in Aus. In regional NSW, allotment
boundaries (and associated park, state forest and local gov boundaries) as
shown on the NSW gov base map (and as often used in OSM) are often inaccurate
by 20-50 m and sometimes lots more. This inaccuracy is clearly stated on the
Six Maps FAQ page (see Q 6&7).
https://www.spatial.nsw.gov.au/__data/assets/pdf_file/0005/216383/SIXMapsFAQ.pdf
Basically, this statewide dataset is not intended to be used at the high zoom
levels that we can use in OSM. Personally, I’d echo Frederick and Andrew’s view
that we may be seeking a false sense of exactitude by focusing on small
apparent differences between statewide datasets and natural features. Cheers Ian
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