I looked at the separation of park boundaries and coastlines down in
Wilson's Prom a while ago and asked the #oceania discord at the time but
never ended up changing anything. If you look at the legal definition of
many national parks, their boundaries are defined by the high water
mark. Since the coastline tag is also supposed to represent the high
water mark then I would say that they should be snapped together (since
they then represent the same feature - that is, the high water mark).
This would mean that the boundary data already in OSM from the
government basemaps would just be their own mapping of the high water
mark, and probably be less up to date or refined as our own.
The other issue I wasn't sure about was the copyright of the government
maps that declare these national parks as following the high water mark.
You could argue that its a legal fact and therefore can't be copyrighted
but it is also hard to find that information outside of government run
archives. (The parks are usually represented on maps of the area by the
Surveyor General and make references to the high water mark, at least in
Vic).
This is my first time responding on talk-au, lmk if I've messed up any
formatting to link to the original question.
On Tue, 28 Mar 2023, at 10:58 AM, Warin wrote:
Hi
Looks like some are setting natural features to government boundaries.
A recent case along the WA south coast has been going on for some years..
The coast line looks very confused and the National Park boundaries are
being changed to the coast line in reverse of what is stated on the
change sets... (bangs head on wall).
I was altered to it by OSMInspector identifying the National Park
boundary being broken by the 'adjustment' of the 'coastline' ... that
broke the National Park boundary...
The National Park boundary looks, in some places, to be the low tide
mark and then in other places to be the hi tide mark, so it is not
consistent.
I do understand where the two (natural feature and government boundary)
coincide that it is easier to use the same way. But every now and then
someone moves it to conform to the latest imagery of the natural feature
.. thus moving the government boundary .. unintended but there we go. My
only solution si to have them as separate ways .. making it easier to
divorce the new nodes added for the new nature feature addition from the
old government boundary.
Any other ideas???
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