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

[Warin]

On 28/3/23 20:46, Frederik Ramm wrote:
> Hi,
>
> I would advise caution with this.
>
> Government bodies will typically hold their own GIS data for park 
> boundaries or administrative boundaries, and the GIS data they have 
> will never fully align with the coastline.
>
> However, it is not our job to be an agent for publishing government 
> data. We have to look further and ask for the actual situation.
>
> If the national park boundary is mostly along the coastline


The problem arises that OSM uses the high tide mark for the coastline 
... there is the possibility that National Parks use the low tide mark - 
so they cover anything washed up on the beach.

The official government data looks to me to use the low tide mark. I 
have sent an inquiry to the National Parks people in the state of interest.


As for the administrative boundaries .. the present official view is 
that local councils cannot now sell 'land' between the high tide and low 
tide, however they have in the past.

What the state of this 'land' between high and low tide is now I'm not 
certain of.