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NFI4
forest area
degree of transportation system density by method of timber harvest
unit of reference: protection forest region
unit: %
unit of evaluation: protection forest perimeter SilvaProtect: access. forest without shrub forest NFI3/NFI4
grid: 1.4 x 1.4 km grid
state2009/17
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern Alps Switzerland
degree of transportation system density by method of timber harvest %± %± %± %± %± %± %±
n/a0.70.50.20.20.0.0.0.0.0.0.40.20.20.1
high road infrastructure, ground based51.22.915.81.617.12.04.31.04.21.03.40.713.60.7
medium road infrastructure, ground based27.52.612.51.411.31.64.41.03.60.91.90.69.00.6
low road infrastructure, ground based5.21.39.41.38.61.511.21.614.51.88.31.19.60.6
high road infrastructure, supported by cable or helicopter13.52.033.52.034.12.524.72.116.51.913.41.422.70.8
medium road infrastructure, supported by cable or helicopter2.10.819.21.720.12.125.62.226.32.228.81.921.70.8
low road infrastructure, supported by cable or helicopter0.0.9.51.38.81.529.82.334.92.443.92.023.30.8
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 11.07.2020 #845442/311773
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