[talk-au] Unincorporated areas added from Local Government National Report map

[Andrew Harvey]

On Thu, 24 Oct 2024 at 21:55, cleary <osm at 97k.com> wrote:

> When OpenStreetMap was initially given permission to use limited NSW
> Government spatial data, it included Local Government Area administrative
> boundaries and, as far as I can ascertain, that permission remains.  The
> website was formerly lpi.nsw.gov.au and became spatial.nsw.gov.au but I
> think we still have permission for the specified datasets as noted in the
> OSM contributors page
> https://wiki.openstreetmap.org/wiki/Contributors#New_South_Wales_Government_data


> I have just been looking for the URL for the LGA dataset and didn't see
> it. However I did find the NSW Spatial Services link to Arcgis map of LGAs:
>
> https://www.arcgis.com/home/webmap/viewer.html?url=https%3A%2F%2Fportal.spatial.nsw.gov.au%2Fserver%2Frest%2Fservices%2FNSW_Administrative_Boundaries_Theme%2FFeatureServer%2F8&source=sd


The CC BY waiver we have covers "Spatial Web Services licensed CC BY 4.0",
which at the time was for a set of REST web services listed at
https://www.spatial.nsw.gov.au/products_and_services/web_services, the
contents of that page changed slightly and now includes the  NSW
Foundational Spatial Data Framework (FSDF) data themes through the Spatial
Collaboration Portal.

So my view is that CC BY licensed foundation spatial data via the Spatial
Collaboration Portal is covered by our waiver and we can continue to use it.

The URL
https://www.arcgis.com/home/webmap/viewer.html?url=https%3A%2F%2Fportal.spatial.nsw.gov.au%2Fserver%2Frest%2Fservices%2FNSW_Administrative_Boundaries_Theme%2FFeatureServer%2F8&source=sd
is
a map viewer for the service at
https://portal.spatial.nsw.gov.au/server/rest/services/NSW_Administrative_Boundaries_Theme/FeatureServer/8
which is covered, so you can use the LGA boundaries layer on that map
viewer.

Or you can download the LGA layers directly using
https://github.com/openaddresses/pyesridump

esri2geojson
https://portal.spatial.nsw.gov.au/server/rest/services/NSW_Administrative_Boundaries_Theme/FeatureServer/8
LGA.geojson

or you can use the "Export data" feature from
https://portal.spatial.nsw.gov.au/portal/home/item.html?id=3e1edb6861524b5490c74db81e42433a



> I don't think we can use this map as a source for copying data but it is
> worth looking to see what data we might be seeking to access. It includes
> "Unincorporated - Sydney Harbour Area" and "Unincorporated - Botany Bay
> Area".  The Sydney Harbour Area includes much of Parramatta and Lane Cove
> Rivers as well as various bays such as Homebush Bay and Canada Bay. OSM
> currently shows the limits of LGAs administered by councils but does not
> show the Unincorporated Sydney Harbour area.
>
> The recent mapping showing islands in the harbour as Unincorporated Sydney
> Harbour appears to be incorrect as the harbour itself is part of the area
> as well as the islands within the harbour.
>

I agree. If we want an Unincorporated Sydney Harbour area in OSM then
https://www.openstreetmap.org/relation/18183667 should just become the
whole harbour boundary including the islands and not a bunch of small areas
like it currently is.

Although I'm conscious that the source data we are using here is just one
representation of the situation and it doesn't always mean we should have
the same representation in OSM. In this case though I can't see any reason
to not include the water areas.

It also looks like the Sydney Harbour area is using a particular high tide
mark for the boundary, and I'd favour aligning it to the harbour boundary
we have in OSM, by using the existing ways as the relation outers.
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