[Tagging] Mapping deforestation wikipage proposal

Peter Elderson pelderson at gmail.com
Wed Mar 20 08:45:16 UTC 2019

a. If the object of the research is just to map deforestation, you only
need to map trees. You also need 100% coverage of all tree areas. You do
not need to map "no landcover".

b. If the object is to map deforestation AND what replaces the trees, you
need to map the replacing landcovers as well, and you need 100% coverage of
those. If there is a landcover other than trees but no detail, a general
landcover is needed. If it is done like that, you do not need to map "no

c. If I did a project like this, I would want to map 100% of the target
area, to make sure all areas have been processed. In that case I would want
to map "no landcover" as opposed to "not mapped yet". Alternatively, I
would mark areas with a separate tag as "not yet included in the project".

d. In all cases, other mappers can and will alter the tagging if and when
they see fit.

Vr gr Peter Elderson

Op wo 20 mrt. 2019 om 09:26 schreef Warin <61sundowner at gmail.com>:

> On 20/03/19 18:54, Lorenzo Stucchi wrote:
> > Hi Giovanni,
> >
> > We thinks that it also important understand if the area is without
> vegetation because becomes a cultivated land, an artificial area or the
> trees are just cutted for wood and so some year after they will appear
> again. For this reason we thinks that is interesting to understand also
> what there is in the are without trees.
> >
> An area without trees will not have a tag for trees. An area that is not
> mapped will look like there are no trees.
> Map the trees and you then know both the area of trees and the area
> without trees. You do not need a special tag to say there are no trees.
> PS the OSM key 'natural' applies to both 'natural' and 'unnatural' areas!
> https://wiki.openstreetmap.org/wiki/Key:natural
> key 'natural' OSM definition: "Used to describe natural physical land
> features, including ones that have been modified by humans."
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