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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
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 gap33.31.011.81.013.01.35.50.96.70.96.70.917.60.5
small gap32.51.014.81.114.51.48.91.212.21.25.70.818.90.5
medium gap10.00.69.70.97.31.07.21.09.81.14.70.78.60.4
large gap9.80.610.70.910.71.211.51.316.31.36.30.810.60.4
very large gap1.20.20.40.20.80.30.20.20.80.30.20.20.70.1
total86.70.747.31.546.31.933.21.845.81.823.71.556.50.6
inside perimeterno gap0.60.23.00.52.80.61.70.51.60.41.10.41.60.2
small gap0.30.12.80.53.90.77.41.02.00.53.10.62.40.2
medium gap0.20.12.30.52.10.64.70.83.70.71.80.51.90.2
large gap0.00.01.40.42.40.65.50.95.10.82.50.52.00.2
very large gap0.0.0.50.20.10.10.50.30.40.20.0.0.20.1
total1.10.29.90.911.31.219.81.612.81.28.51.08.10.3
outside perimeterno gap4.60.49.80.912.21.38.41.16.10.923.81.59.50.4
small gap5.00.515.61.114.71.315.11.411.61.222.61.512.10.4
medium gap1.40.38.00.86.51.08.61.18.41.09.21.05.80.3
large gap1.10.29.20.98.31.113.91.414.01.311.71.17.60.3
very large gap0.10.10.30.20.60.31.00.41.20.40.50.20.50.1
total12.20.742.81.542.41.947.12.041.41.867.81.635.40.6
totalno gap38.51.024.51.328.01.715.61.514.41.331.61.628.70.6
small gap37.81.033.11.533.21.831.41.925.81.631.41.633.50.6
medium gap11.60.720.01.215.91.420.51.621.91.515.71.316.30.5
large gap10.90.721.21.221.41.630.91.935.51.720.51.420.30.5
very large gap1.20.21.20.31.50.51.70.52.40.60.70.31.40.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #875981/342313
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