[talk-au] Putting streams into OSM

[Warin]

On 29/5/23 08:11, Joseph Crowell via Talk-au wrote:
>
> Regular area shapes have a node limit that is quickly reached when 
> mapping rivers/lakes.
>
As a guide:

2,000 nodes to a way, 300 members to a relation...

> 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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