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NFI4
number of forest plots
avalanches SilvaProtect · area of largest gap (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
avalanches SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %±
n/ano gap33.11.010.21.011.21.24.00.85.40.86.30.917.00.5
small gap32.61.014.41.115.01.48.21.112.21.24.90.819.00.5
medium gap10.00.610.00.97.41.06.71.110.11.14.00.78.60.4
large gap9.70.611.11.010.71.211.01.316.21.46.00.810.50.4
very large gap1.20.20.40.20.80.40.20.20.60.30.10.10.70.1
total86.60.746.01.645.02.030.11.944.51.821.31.555.80.6
inside perimeterno gap0.60.23.10.62.80.61.80.51.70.51.20.41.60.2
small gap0.30.12.80.54.10.87.61.12.10.53.30.62.50.2
medium gap0.20.12.40.52.00.65.00.94.00.71.90.51.90.2
large gap0.00.01.30.42.30.65.91.05.10.82.60.62.00.2
very large gap0.0.0.50.20.10.10.50.30.40.30.0.0.20.1
total1.10.210.10.911.41.320.81.613.31.39.01.08.30.3
outside perimeterno gap4.60.59.91.012.61.38.61.25.70.924.31.59.50.4
small gap5.00.516.21.215.21.415.91.511.91.223.11.512.30.4
medium gap1.40.38.20.96.61.09.21.28.81.09.71.15.90.3
large gap1.10.29.30.98.61.114.41.514.61.312.11.27.80.3
very large gap0.10.10.30.20.60.30.90.41.30.40.50.30.50.1
total12.20.743.91.643.51.949.02.142.21.869.71.635.90.6
totalno gap38.41.023.21.326.51.714.51.512.71.231.71.728.00.6
small gap37.91.033.41.534.31.931.81.926.21.631.21.733.80.6
medium gap11.60.720.51.316.01.520.91.722.81.615.71.316.50.5
large gap10.90.721.71.321.61.631.21.936.01.820.71.420.30.5
very large gap1.20.21.20.31.60.51.60.52.30.60.60.31.40.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #875980/342312
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