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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: 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/an/a0.60.26.21.06.31.211.52.03.90.915.72.14.30.3
no gap38.21.124.61.828.82.316.52.316.41.725.62.530.20.7
small gap37.21.128.81.929.62.323.62.628.02.121.32.432.00.7
medium gap11.40.718.41.714.21.818.92.420.01.917.72.214.70.6
large gap11.20.721.21.719.72.029.22.830.22.119.02.317.60.6
very large gap1.30.30.70.41.30.60.40.41.50.60.70.51.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimetern/a4.14.02.91.63.62.03.11.53.91.91.41.43.10.8
no gap50.110.229.64.524.34.78.42.413.33.312.43.918.81.7
small gap25.18.927.14.332.75.237.14.315.43.536.15.729.22.0
medium gap16.77.622.44.017.44.222.53.727.34.320.84.822.11.8
large gap4.14.013.33.321.04.526.63.937.14.729.25.424.41.9
very large gap0.0.4.72.11.11.12.31.33.01.70.0.2.30.7
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimetern/a0.40.41.80.67.01.52.10.83.51.05.10.93.50.4
no gap37.93.022.52.026.72.517.62.215.11.933.51.926.00.9
small gap40.73.035.82.332.42.631.42.727.02.431.81.933.01.0
medium gap11.62.018.21.814.22.018.02.219.32.112.71.415.60.8
large gap9.01.821.01.918.42.228.92.632.42.516.41.520.70.8
very large gap0.40.40.70.41.30.62.10.82.80.90.60.31.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totaln/a0.60.24.10.66.30.95.90.93.70.68.10.93.90.2
no gap38.31.024.21.327.51.615.41.415.61.229.51.427.90.5
small gap37.51.031.51.431.01.629.51.726.21.528.91.532.10.6
medium gap11.50.718.71.214.51.319.21.520.61.314.81.115.60.4
large gap10.80.720.41.219.31.428.51.731.81.518.11.219.20.5
very large gap1.20.21.10.31.30.41.50.52.20.50.60.21.30.1
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #876005/342337
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