[talk-au] Lakes around Mungo National Park

[Warin]

On 22/2/22 18:55, Warin wrote:
>
>
> On 22/2/22 09:20, Graeme Fitzpatrick wrote:
>>
>>
>>
>> On Mon, 21 Feb 2022 at 17:30, Warin <61sundowner at gmail.com> wrote:
>>
>>
>>     DCS Topo Legend
>>     https://raw.githubusercontent.com/mholling/nswtopo-legends/master/nsw.png
>>
>>
>> Personally, I think the dry-lake proposal has a lot going for it - 
>> maybe we should just start using it? A comment on it's talk page also 
>> suggested natural=salt_pan, which isn't bad either.
>>
>> I also notice on the Topo index that they show both wet & dry swamps 
>> - dry swamp may also be an option
>
>
> Except the Topo map does not map as a wet land/ swamp...
>
> To me a lake would have to have some depth of water in it, not just 
> soggy soil .. so I against 'lake' if it never has a water surface now, 
> even though they were lakes in the distant path.
>
> Satellite imagery is not consistent across the 'lake' area .. would 
> end up being a matrix of surface types.
>
>
> "A playa is a dry, vegetation-free, flat area at the lowest part of an 
> undrained desert basin. It is a location where ephemeral lakes form 
> during wet periods, and is underlain by stratified clay, silt, and 
> sand, and commonly, soluble salts."
>
>
> So it is not a playa as defined above by the US Geo Science people...
>
> A 'dry_lake' as defined on the osm wiki "An area of flat, dried-up 
> land that is almost always dry, but rarely fills with water creating a 
> very shallow lake."
>
>
> Humm well it does not define 'rare' so I suppose it is as close as 
> were are going to get.
>
>
> As a square peg for a place of round holes  :P
>
> natural/landform=dry_lake -3 uses of this in OSM .. so it will not 
> render.
>
> was:water=lake
>
> name=Lake Mungo
>
>
> As a matrix of surface types then a multipolugon with each surface 
> type as a member ...
>
>

 From http://www.visitmungo.com.au/plants

Looks like the 'lake beds' are mainly shrubs (bluebush and saltbush) 
with grasslands on the wetter areas..


Possible ignore grass  and a stretch of things to get


natural=shrub

landform=dry_lake

was:water=lake

name=Mungo Lake


and similar for the rest of these???

I'll have a look tomorrow at the various images to see if I can detect 
differences.

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