[Tagging] Mapping deforestation

Sergio Manzi smz at smz.it
Mon Mar 11 23:42:54 UTC 2019

Thanks for the numbers, for explaining and for the link, Christoph. Apreciated!


On 2019-03-12 00:19, Christoph Hormann wrote:
> On Monday 11 March 2019, Peter Elderson wrote:
>> Sorry, 2000.
> IIRC the saying is "two wrongs does not make a right".
> Original use of tags with the landcover key, that is mappers creating a 
> new geometry with a landcover tag, is as follows (based on data from 
> 2019-02-28):
> 72848 ways/relations (more of half of these created in organized mapping 
> with tagging not being the free choice of the mapper)
> 1310 different users
> 494 of which have used the key exactly once (this, i.e. that about 1/3 
> to half of the genuine active users of a tag have only used it once is 
> pretty standard but still this has to be kept in mind when 
> contemplating such numbers)
> The reason why taginfo reports only the number of users who have last 
> touched features with this key is not because this is particularly 
> meaningful information but because this can be counted quite easily 
> when processing a planet file (which is what taginfo does on a daily 
> basis) while numbers on active users (i.e. who maps features with a tag 
> or who adds a tag to features) can only be determined from the history.
> I can highly recommend Frederik's talk on the matter of OSM statistics 
> which discusses this in detail:
> https://www.youtube.com/watch?v=Kx0KuvkbvfQ

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