[talk-au] Mapping tree cover

[Adam Horan]

I think you're asking the same question as Andrew, but you possibly have
different viewpoints or opinions on it.

I see the map as a painting that's becoming more detailed and accurate as
time progresses. In the beginning the map was blank, and people added large
areas of landcover just to get something down. Mappers took conveniences
like marking a national park as all desert or all trees.

However now that all the basics have been done mappers are adding more
detailed, accurate information and using more sophisticated tagging schemes.

I think it's entirely right that we map what's on the ground. If there's a
20m gap in the trees for a road, or significant fire break, or there's been
clearing, then people should map that in detail if they have time and
inclination.

Also the trees tend not to respect administrative boundaries, it's almost
like they don't know they're there... Tree cover extends beyond the
National Parks in a continuous run, and similarly there are clearings,
lakes, meadows, moorlands within the parks.

However the first step in mapping this detail is to remove the blanket
landcover from the admin boundary.

Adam


On Fri, 8 Oct 2021 at 09:22, EON4wd <info at eon4wd.com.au> wrote:

> Hi,
>
> Further to Andrew Parkers question about forested areas.
>
> I am also a casual user for uploading data and I also create my own maps
> from the data.
>
> My interest is in 4wd tracks.
>
> The Grampians has had the ‘landcover – tree’ ‘areas’ changed which in my
> opinion is now not correct.
>
> See
>
> https://www.openstreetmap.org/edit#map=16/-37.1268/142.3867
>
> The Grampians is a National park and is covered in trees.
>
> There are a number of rocks and rocky outcrops (lots actually) and a few
> lakes and roads plus some swamp and rock quarries, but generally speaking
> it is completely covered in trees, everywhere, including the rocky outcrops.
>
> I suspect that some well meaning person has mapped what they could see via
> a satellite image after a fire went though.
>
> Question, How can I identify this person so that I can contact them to be
> able to find out what they are thinking?
>
> Traditionally, the whole area is mapped as tree cover and then other
> features are added on top, such as the lakes and roads.
>
> Also towards the SA border there are other treed areas that have been very
> carefully traced out. Yet traditionally the whole area is set with the
> fence lines and tracks then marked on top.
>
> Not necessarily wrong, but tracing the exact line of where the trees
> finish and the road side has been cleared, is not really helpful. Or is it?
>
>
>
> Thanks
>
> Ian Winter
>
>
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>
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