[Imports] Forest Cover Data

SomeoneElse lists at mail.atownsend.org.uk
Mon Oct 20 09:53:04 UTC 2014


On 20/10/2014 10:12, Pavel Machek wrote:
> Hi!
>
>>> I just stumbled over
>>> http://earthenginepartners.appspot.com/science-2013-global-forest
>>>
>>> More info under
>>> http://earthenginepartners.appspot.com/science-2013-global-forest/dow
>>> nload.html
>> Independent from the license the tree cover data is not suited for
>> import into OSM for multiple reasons:
>>
>> - the data shows percentage of tree cover which is something OSM does
>> not map.  OSM does only distinguish between forest/wood and no
> It should be pretty safe to say that anything with >75% tree cover is
> forest/wood.
>

My back garden begs to differ!

Seriously, for the reasons already mentioned it doesn't make sense to 
import this, but it does sound like it would be very useful as a way of 
QAing already imported forest / non-forest data.  It'd only be useful 
for _large_ forest areas though and only as a second opinion - looking 
locally there are more than a few "false positives" and "false 
negatives" (showing forest loss when there wasn't any, and missing some 
forest extent / forest gain).  Also the data (in Derbyshire, England) 
seems to be offset to the south by a couple of tens of meters.

Cheers,

Andy






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