[talk-au] Vicmap Hydro and OSM

[Andrew Harvey]

On Tue, 14 Jan 2025 at 08:54, Little Maps <mapslittle at gmail.com> wrote:

> I can’t speak to anyone's future plans, but the Vicmap Hydro dataset has
> not been imported to date. Generally we have only a small subset of the
> creeks (streams) that are in Vicmap Hydro.
>

If anyone is interested in proposing an import, I'm happy to help with
reviewing it.


> I did a lot of work last year joining disconnected waterway sections in
> Victoria, and adding name tags. From memory, nearly all rivers and streams
> mapped in OSM are now joined, so one can plot, for example, all mapped
> creeks that flow into the catchment of a major river, or that flow to the
> coastline, using an overpass turbo query.
>

Have you seen https://waterwaymap.org/#map=6.08/-37.162/144.87 ?


> The accuracy of waterways in osm varies greatly, some are very precise,
> others very vague. Some were traced from the VicMap Hydro Lite layer (I
> can’t remember its precise name), which is appalling. Please don’t use this
> layer. From memory, nearly all sections of named rivers flow in the right
> direction too now. I can’t remember if this is true for smaller creeks.
>

I think because we have some places potentially better than VicMap and
other places worse, and other places missing, at best you could import the
missing sections, then review others and improve geometries where it's
clear VicMap is better.
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