[talk-au] Deserts, mapping and sources
61sundowner at gmail.com
Wed Jan 17 02:11:18 UTC 2018
On 17-Jan-18 12:48 PM, Andrew Davidson wrote:
> On 17/01/18 10:49, Warin wrote:
>> OSMand has started rendering deserts.
>> I note that only the Simpson Desert in OSM so far is Way: Simpson
>> Desert (168949121) ... I cannot find the source for this.
>> It would be nice to map the other deserts that we have too.
> I'm not sure that there is much point in mapping deserts. Someone has
> already helpfully outlined why:
> Deserts are a climatic concept:
A wetland too has a fuzzy boundary, much like a desert.
Deserts are well known .. talk of 'crossing the Simpson Desert' and
most people will have some idea of what your doing and where you are
Not mapping them simply leads to missing information.
> What you should map is what you can see on the ground. So the Simpson
> Desert should be natural=sand, which is what you can see in the aerial
What is on the round in the Simpson Desert varies widely, but in general;
In the swales between the sand dunes most of the time there is light
scrub ... some times you find salt lakes (e.g. just west of Poepells
Corner for instance).
On the wester slope of the sand dunes you find some scattered scrub.
On the eastern side of the sand dunes you find the occasional plant
fighting the sand drifting over it.
I'd be removing mapping of entire desert areas as sand or any other
single land cover just based on the assumption that because it is a
desert it must be covered by x.
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