[talk-au] PSMA Administrative Boundaries

[cleary]

In regard to admin boundaries sharing the coastline, I think that would also be incorrect but I am less confident of my view on this.

I did update some administrative boundaries in South Australia using the SA Government Data and those boundaries did not coincide with the coastline (see the coastline around Streaky Bay, Ceduna, Fowlers Bay and near the Nullarbor).  The coastline in OSM needs a lot of work - I have looked at parts of WA and SA but found it very difficult to use the satellite imagery correctly to refine the map of the coastline in areas where there are extensive mudflats or large tidal flows and even rocky areas just under/above the waterline. But I suggest it is safest, and more accurate, to map the administrative boundaries and the coastline separately.