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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
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 gap33.41.012.71.015.31.36.81.08.71.08.50.918.30.5
small gap32.51.014.91.115.81.49.71.214.91.27.10.919.30.5
medium gap9.90.69.50.97.61.07.81.110.61.15.90.88.90.4
large gap9.80.611.00.910.51.112.01.316.01.26.30.810.60.4
very large gap1.20.20.40.20.70.30.20.20.80.30.20.20.70.1
total86.70.748.61.549.81.836.31.851.01.728.01.457.90.5
inside perimeterno gap0.60.22.90.52.70.61.60.51.60.41.00.31.50.2
small gap0.30.12.70.53.60.77.31.01.90.52.90.62.40.2
medium gap0.20.12.20.41.90.54.40.83.30.61.60.41.80.2
large gap0.00.01.30.32.30.65.20.94.50.72.30.52.00.2
very large gap0.0.0.50.20.10.10.50.30.40.20.0.0.20.1
total1.10.29.60.910.71.119.01.511.61.17.80.97.80.3
outside perimeterno gap4.60.49.60.911.31.28.01.15.80.822.61.49.30.4
small gap5.00.515.31.113.71.314.31.410.51.021.51.411.70.4
medium gap1.40.37.80.86.00.98.21.17.50.98.60.95.50.3
large gap1.10.28.90.97.81.013.11.312.51.111.11.07.40.3
very large gap0.10.10.30.20.60.31.00.41.10.40.40.20.40.1
total12.20.741.81.539.41.844.61.937.41.664.21.634.30.5
totalno gap38.61.025.31.329.31.716.41.516.21.232.11.529.10.6
small gap37.81.032.91.433.11.731.31.827.21.531.41.633.40.6
medium gap11.60.719.51.215.51.320.41.621.41.416.11.216.20.5
large gap10.90.721.21.220.61.530.31.833.01.619.71.320.00.5
very large gap1.20.21.10.31.40.41.60.52.30.50.70.31.30.1
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #887338/353670
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