[talk-au] Why set coast line to nation park or administrative boundaries?

[Little Maps]

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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