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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 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 gap38.31.123.21.927.12.414.92.514.31.729.83.030.40.8
small gap37.61.131.32.133.32.627.73.230.22.324.72.934.00.8
medium gap11.50.720.71.815.82.023.03.021.72.121.42.715.70.6
large gap11.20.724.01.922.22.333.93.432.62.323.62.818.70.6
very large gap1.40.30.80.41.60.70.50.51.30.60.40.41.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap52.210.430.84.624.85.08.62.514.13.512.63.919.51.8
small gap26.19.228.24.535.35.538.34.416.33.736.75.730.52.1
medium gap17.47.923.34.217.44.423.23.829.04.621.14.922.91.9
large gap4.34.212.83.321.34.727.44.037.44.929.65.424.61.9
very large gap0.0.4.92.21.21.22.41.43.21.80.0.2.50.7
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap37.93.022.52.028.42.717.62.313.71.935.42.026.60.9
small gap40.83.037.02.335.32.832.42.828.22.633.12.034.31.0
medium gap11.72.018.61.914.82.118.82.320.52.313.51.416.20.8
large gap9.11.821.21.920.12.429.42.734.62.717.31.621.60.9
very large gap0.40.40.70.41.40.71.80.83.01.00.70.31.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap38.41.023.61.327.41.714.91.414.01.232.11.628.20.6
small gap37.91.033.41.534.31.832.01.927.71.631.21.633.90.6
medium gap11.60.720.11.315.61.421.11.722.11.516.21.316.50.5
large gap10.90.721.71.321.31.530.51.933.91.619.91.320.20.5
very large gap1.20.21.20.31.50.51.50.52.20.50.60.31.30.1
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #887616/353948
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