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NFI4
forest area
rockfall SilvaProtect · degree of cover (aerial photo, 5 classes)
unit of reference: protection forest region
unit: %
unit of evaluation: accessible 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
rockfall SilvaProtectdegree of cover (aerial photo, 5 classes) %± %± %± %± %± %± %±
n/a0-20%1.40.31.10.50.40.32.41.21.60.71.91.11.40.2
21-40%1.90.34.41.010.21.815.72.811.31.812.92.65.20.4
41-60%6.00.520.41.817.32.229.73.529.02.523.23.313.50.6
61-80%17.80.932.82.226.32.630.13.537.22.722.73.323.50.7
over 80%72.91.041.22.245.92.822.13.120.82.239.43.856.50.8
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeter0-20%0.0.0.0.2.72.70.0.0.0.1.81.81.00.7
21-40%4.84.70.0.5.63.86.14.25.35.23.62.54.31.5
41-60%0.0.9.06.15.43.722.47.026.710.29.23.911.72.4
61-80%24.89.630.19.619.46.650.28.431.010.613.04.626.43.2
over 80%70.410.260.910.366.97.821.26.736.911.172.56.156.53.6
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeter0-20%0.40.42.40.71.60.70.60.40.60.40.70.41.10.2
21-40%0.0.5.31.03.81.15.11.28.61.43.10.74.50.4
41-60%2.20.910.91.39.91.720.42.130.02.39.61.214.00.7
61-80%13.42.130.12.022.82.435.32.536.82.425.21.828.00.9
over 80%83.92.251.42.162.02.638.72.524.02.161.32.052.51.0
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
total0-20%1.30.21.70.41.10.41.10.41.00.41.10.41.20.1
21-40%1.70.34.80.76.81.08.31.19.81.15.20.84.90.3
41-60%5.50.515.31.113.01.323.31.829.51.712.51.213.60.4
61-80%17.30.831.31.524.21.734.62.036.81.823.81.525.40.6
over 80%74.30.946.91.555.01.832.61.923.01.557.41.754.80.6
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 18.06.2020 #861448/327779
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