Mar 11, 2019, 8:58 PM by marc_marc_...@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.
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