[talk-au] Use of DEM data to generate streams

[Andrew Harvey]

The DCS Spatial Services waiver we obtained at
https://wiki.openstreetmap.org/w/index.php?title=File%3ASpatialServices_NSW_OSM_Waiver_completed.pdf&page=2
specified "Spatial Web Services" which at the time covered


   1. NSW Imagery
   2. NSW Base Map
   3. NSW Points of Interest
   4. NSW Administrative Boundaries
   5. NSW Imagery Date
   6. NSW Address Location Service
   7. NSW Cadastre
   8. NSW Property
   9. NSW Topographic Map
   10. NSW Survey Control Management System (SCIMS)

See the achived page at
https://web.archive.org/web/20201031195357/https://www.spatial.nsw.gov.au/products_and_services/web_services

However now that page lists more datasets as "Web Services"
https://www.spatial.nsw.gov.au/products_and_services/web_services which now
does include
https://portal.spatial.nsw.gov.au/portal/home/item.html?id=85ca688f5e9c43e28363dda4bbf23d42
which is the NSW Elevation and Depth Theme data from ELVIS.

Based on this I'm comfortable that we can use this data under the existing
waiver we have.

What I'd suggest is to document your process for deriving the stream
geometry from the ELVIS data and what you're proposing to import and how.
eg. how do you determine how far upstream to map, how do you determine if
what's in OSM is better already than ELVIS or if ELVIS is better.

On Fri, 10 Jan 2025 at 17:10, Tom Brennan <website at ozultimate.com> wrote:

> Is it permissible to use DEM data from ELVIS to generate a stream layer
> than can then be used to improve the existing streams in OSM?
>
> In NSW, most of the streams have been either copied from the DCS base or
> topo map, or (less common) traced from DCS aerial imagery. The accuracy of
> the original DCS base/topo data (not the tracing!) in some places is fairly
> woeful. The aerial imagery is better, but suffers from canopy cover.
>
> The DEM data is licensed under CC 3.0.
>
> cheers
> Tom
> ----
> Canyoning? try http://ozultimate.com/canyoning
> Bushwalking? try http://bushwalkingnsw.com
>
>
> _______________________________________________
> Talk-au mailing list
> Talk-au at openstreetmap.org
> https://lists.openstreetmap.org/listinfo/talk-au
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/talk-au/attachments/20250111/6a48c4af/attachment.htm>