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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: forest
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%1.30.21.00.30.60.30.90.40.90.31.70.41.10.1
21-40%1.70.33.20.56.10.86.81.07.00.84.30.64.10.2
41-60%5.40.511.10.99.31.012.01.214.41.27.30.89.00.3
61-80%15.50.815.41.113.91.210.81.218.01.37.80.914.00.4
over 80%62.81.019.01.220.01.48.11.010.71.09.50.929.80.5
total86.70.749.71.549.81.838.61.851.11.630.51.458.10.5
inside perimeter0-20%0.0.0.40.20.10.10.0.0.10.10.0.0.10.0
21-40%0.00.00.40.20.50.30.90.40.80.30.30.20.40.1
41-60%0.00.01.60.40.50.24.50.83.60.61.50.41.50.1
61-80%0.20.12.70.52.90.66.30.94.40.72.30.52.50.2
over 80%0.80.24.40.66.40.96.80.92.70.53.20.63.30.2
total1.10.29.50.910.41.118.51.411.61.17.30.87.80.3
outside perimeter0-20%0.00.00.80.30.60.30.60.30.40.20.80.30.50.1
21-40%0.0.2.00.41.30.42.70.63.40.62.10.51.50.2
41-60%0.20.14.20.64.40.78.31.111.21.05.90.74.50.3
61-80%1.60.312.11.08.41.016.01.413.11.114.71.19.20.3
over 80%10.30.621.71.225.01.515.21.39.20.938.61.518.40.4
total12.10.740.91.539.71.742.91.937.31.662.21.534.20.5
total0-20%1.30.22.20.41.40.41.50.51.40.42.50.51.70.2
21-40%1.80.35.60.77.90.910.41.211.31.06.80.86.10.3
41-60%5.60.516.91.114.21.224.81.629.21.514.71.115.00.4
61-80%17.40.830.21.425.21.533.11.835.51.624.81.425.70.5
over 80%73.90.945.11.451.31.630.21.722.61.351.31.551.60.5
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 18.06.2020 #863345/329676
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