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

[Tom Brennan]

On 14/01/2025 11:00 pm, Andrew Harvey wrote:
> On Tue, 14 Jan 2025 at 22:24, Tom Brennan <website at ozultimate.com> wrote:
>> One field that I have in my data that doesn't have an equivalent in OSM is
>> a relevance/importance field. 
> 
> I think that's something the downstream data consumers can calculate from
> the OSM data rather than tags we add to OSM. This is how
> https://waterwaymap.org/#map=9.87/-33.6952/150.5121 does their stream
> thickness rendering.

Fair enough - there is some Rust code that looks like it does the heavy lifting there.

It does also highlight a couple of spots where I obviously stuffed up the named stream import... :)

>> If I develop it further, then I'll add some more documentation. At the
>> moment, I am just exporting the layer as GeoJSON and dragging it into ID.
>> There are videos and tutorials on various things you can do with the DEM
>> data at:
>> https://maps.ozultimate.com/wiki/nsw_lidar
> 
> Nice documentation there.

Thanks, there seem to be a lot of people in the bushwalking community using this or similar approaches for finding passes, canyons etc.

cheers
Tom
----
Canyoning? try http://ozultimate.com/canyoning
Bushwalking? try http://bushwalkingnsw.com