[talk-au] Putting streams into OSM

[Joseph Crowell]

Regular area shapes have a node limit that is quickly reached when 
mapping rivers/lakes.

Islands/islelets are also not properly cut out when they are created 
within a water body.

The solution to both of these issues is creating a multipolygon with 
relations.

On a side note, this is a nightmare to work with within iD and one of 
the main reasons people switch to another editor.

Regards,

Joseph Crowell

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On 26/05/2023 5:42 pm, Tom Brennan wrote:
> On 26/05/2023 1:54 pm, Josh Marshall wrote:
> > But I’ve also made relations for all of our local streams and creeks;
> > go to the Newcastle area and search for Ironbark or Cottage Creek for
> >  instance… it used to just return a single hit on one small section
> > for almost every creek. My interest here is because much of the area
> > was uninhabitable swamp until there was a huge effort to put in some
> > monster drains in the 1890s. And yet it will still occasionally flood
> > and people complain about council not doing anyway…
>
> Just asking out of interest - what's the reason for using relations? 
> Or is it specifically for the search that you mentioned?
>
> > Do note, the DCS map can be quite wrong in places… I’m pretty sure a
> > lot of it was done once and then never updated.
>
> Yes, I don't like the current DCS stream layer - streams going up and 
> over ridges in some places!
>
> I understand that DCS is in the process of bringing the stream data up 
> to date post the LIDAR scans of all of NSW. But it sounds like it is 
> bogged down in some non-technical issues (ie nothing related to the 
> actual dataset). So no idea when it will be released!
>
> I'd be interested if anyone knows anything definite about the data - 
> my info is hearsay.
>
> cheers
> Tom
> ----
> Canyoning? try http://ozultimate.com/canyoning
> Bushwalking? try http://bushwalkingnsw.com
>
>
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