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NFI4
forest area
avalanches SilvaProtect · degree of cover (aerial photo, 5 classes)
unit of reference: protection forest region
unit: %
unit of evaluation: accessible forest without shrub forest NFI1/NFI2/NFI3/NFI4
grid: 1.4 x 1.4 km grid
state2009/17
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern Alps Switzerland
avalanches SilvaProtectdegree of cover (aerial photo, 5 classes) %± %± %± %± %± %± %±
n/a0-20%1.40.31.30.60.40.40.90.90.80.50.90.91.20.2
21-40%1.60.33.00.98.11.712.13.09.01.82.01.43.50.3
41-60%5.80.518.81.915.12.225.64.027.62.815.63.611.50.6
61-80%17.50.933.22.325.52.734.54.340.43.126.54.423.40.8
over 80%73.61.043.72.450.93.026.93.922.22.654.94.960.40.8
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeter0-20%0.0.4.12.01.41.40.0.0.0.0.0.1.10.5
21-40%4.03.95.12.25.72.74.41.97.22.83.32.35.11.0
41-60%4.34.217.23.84.22.423.23.927.14.816.44.817.81.8
61-80%21.18.429.34.626.65.334.64.440.45.330.95.932.12.2
over 80%70.69.444.35.062.05.837.74.525.44.749.46.443.92.3
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeter0-20%0.40.41.70.61.90.80.40.40.40.40.70.41.00.2
21-40%0.0.5.01.03.11.14.81.37.21.61.50.63.50.4
41-60%1.50.89.41.48.11.719.12.430.22.86.41.111.70.7
61-80%13.82.130.12.221.42.538.23.036.42.923.21.927.11.0
over 80%84.22.353.82.365.52.937.52.925.82.668.32.156.81.1
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
total0-20%1.30.21.80.41.20.40.40.30.50.30.60.31.10.1
21-40%1.40.34.20.65.60.96.51.18.01.11.70.53.60.3
41-60%5.30.514.31.110.71.321.71.828.71.88.91.112.10.4
61-80%17.10.831.41.523.81.836.52.138.62.024.51.725.50.6
over 80%74.90.948.41.558.81.934.92.124.21.764.31.957.70.6
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 18.06.2020 #863402/329733
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