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NFI3
number of forest plots
rockfall 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: terrestrial grid NFI3
state 2004/06
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern AlpsSwitzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %±
n/ano gap60.11.131.52.140.12.723.32.923.32.234.43.547.50.8
small gap15.90.823.51.919.32.225.73.018.32.017.92.818.10.6
medium gap9.80.720.31.813.81.922.32.922.12.221.93.114.10.6
large gap11.90.721.91.823.62.326.73.133.62.524.33.217.90.6
very large gap2.30.32.80.73.21.02.01.02.70.91.50.92.40.3
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap33.410.350.09.543.67.928.97.440.910.539.86.239.43.4
small gap23.79.314.36.610.34.926.37.19.16.120.75.118.02.6
medium gap38.110.63.63.515.45.831.57.527.39.514.04.319.72.7
large gap4.84.728.68.525.67.013.35.518.28.222.35.320.02.8
very large gap.0.03.63.55.13.5.0.04.54.43.22.22.81.1
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap60.72.832.11.942.02.623.82.112.91.642.12.034.80.9
small gap18.22.224.01.717.62.028.92.225.02.122.51.723.00.8
medium gap9.71.718.91.616.41.922.12.023.62.114.01.417.60.7
large gap11.01.821.21.720.52.124.32.135.02.320.01.622.30.8
very large gap0.30.33.80.83.51.01.00.53.50.91.50.52.40.3
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap60.01.032.31.441.21.823.91.718.31.440.31.742.00.6
small gap16.30.823.51.318.01.427.81.821.61.421.41.420.10.5
medium gap10.00.619.21.215.11.322.71.623.01.515.71.215.70.4
large gap11.70.721.71.222.21.524.41.733.91.721.11.419.80.5
very large gap2.00.33.30.53.50.71.20.43.20.61.60.42.40.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151107/137487
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