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NFI4
forest area
rockfall SilvaProtect · degree of cover (aerial photo, 5 classes)
unit of reference: protection forest region
unit: 1000 ha
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)1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
n/a0-20%5.1201.0450.21000.8501.0450.6588.715
21-40%7.0174.1225.8185.4197.2164.12233.68
41-60%21.8919.0109.91410.21418.4107.41686.85
61-80%64.8530.4815.11110.31323.697.316151.53
over 80%265.8238.2726.487.61513.21212.612363.92
total364.5192.7457.4534.3763.5532.07644.51
inside perimeter0-20%0.0.0.0.0.21000.0.0.0.0.21000.471
21-40%0.21000.0.0.4710.4710.21000.4711.635
41-60%0.0.0.4710.4701.6351.0451.0454.421
61-80%1.0451.4381.4383.5231.2411.4389.814
over 80%2.7272.8284.9201.5351.4387.81621.110
total3.9224.5217.3167.0163.82310.81337.37
outside perimeter0-20%0.21002.5281.0440.4710.4710.8505.319
21-40%0.0.5.5192.4283.7236.5173.32421.410
41-60%1.24111.4136.21814.81122.6910.31366.55
61-80%7.31631.3714.31125.6827.8827.08133.44
over 80%45.6653.5538.9628.1718.2965.74250.02
total54.36104.2362.8472.5375.64107.13476.61
total0-20%5.3193.5241.4371.2411.4381.63514.412
21-40%7.2169.6148.6159.51413.9117.81556.66
41-60%23.1930.8716.51026.6842.1618.710157.73
61-80%73.0563.1530.8739.4652.6535.77294.72
over 80%314.2194.5370.2337.1632.8786.13634.91
total422.81201.41127.52113.82142.82150.021158.41
© WSL, Swiss National Forest Inventory, 18.06.2020 #862005/328336
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