[talk-au] Coast line NSW Hawkesbury

[Warin]

Hi,


The present coastline for the Hawkesbury goes from Box Head to Barrenjoey.

See https://www.openstreetmap.org/way/557825041

This is also use to define 'Broken Bay', both relations are correct in 
OSM terms.


I have just corrected a shared segment for this way ... so my attention 
was attracted to where it should be.

The PSMA boundaries run Box Head to West head then to Barrenjoey. I 
think may be done so to have some legal thing applied to water craft 
leaving Pittwater?

But a transport NSW document does state "Broken Bay entrance from 
Barrenjoey Head to Box Head" which would suggest that the present 
version is correct at least in a general sense if not precisely.

https://www.transport.nsw.gov.au/system/files/media/documents/2022/hawkesbury-pittwater-brisbane-water-regional-boating-plan.pdf

Note The coastline does not render in this area. The coastline carries 
the name 'Mainland Australia'. There is probably a choice here - I think 
OSM says something abut running from one headland to another, the issue 
hear is there are 3 'headlands'.