12. Jun 2018 13:22 by marc.ge...@gmail.com <mailto:marc.ge...@gmail.com>: > How do people in GIS know how many square meter of forest there is in > a country based on OSM-data ? > I would start from something like: total area of area covered by landuse=forest and natural=wood after excluding very small areas. > Is the data suited for that ? Depends on (a) where (b) what kind of accuracy is needed, forest in many regions are unmapped or partially mapped. > How can I find those places with OSM data ? > What you exactly want to find? > I thought I had an answer for all the above questions when > natural=wood, landuse=forest, landcover=trees where used "properly". No, you cant. As there are conflicting tagging methods natural=wood, landuse=forest, landcover=trees are effectively synonymous. See https://wiki.openstreetmap.org/wiki/Forest <https://wiki.openstreetmap.org/wiki/Forest> for details.
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