[Tagging] Mapping deforestation

[Mateusz Konieczny]

Mar 11, 2019, 10:28 PM by marc_marc_irc at hotmail.com:

> Le 11.03.19 à 21:36, Mateusz Konieczny a écrit :
>
>> Mar 11, 2019, 8:58 PM by >> marc_marc_irc at hotmail.com <mailto:marc_marc_irc at hotmail.com>>> :
>>
>>  Le 11.03.19 à 19:27, Christoph Hormann a écrit :
>>
>>  we map positively what verifiably exists
>>
>>
>>  with different imagery, it is possible to verify:
>>  - that an old one shows trees: old:landcover=trees
>>  - that a more recent one shows no trees. landcover=xyz landuse=farmland
>>
>> We do not map what was in the past and disappeared.
>>
>
> who is we ? check taginfo for ex 288k old_name or some lifecycle prefix
> if some users keep old name, I see no issue to keep the old cover in 
> addition to the new one.
>
old_name is OK - it is for name that is older/outdated but still in use among
some people

The only case where it is a bit OK is for recently changed features
(note="cycleway tagged here is not yet visible on aerial images"
or note-"house visible on aerial images is demolished as of 2019-03").
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