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NFI3
number of forest plots
avalanches SilvaProtect · area of largest gap (aerial photo, 5 classes)
unit of reference: production region
unit: %
unit of evaluation: accessible forest without shrub forest NFI1/NFI2/NFI3/NFI4
grid: grid NFI4 2009-2013
state 2004/06
production region
JuraPlateauPre-AlpsAlpsSouthern AlpsSwitzerland
avalanches SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %±
n/ano gap60.22.361.02.040.23.025.22.546.97.050.51.2
small gap16.11.814.51.422.22.620.92.315.75.117.40.9
medium gap9.71.410.91.318.82.421.72.421.65.814.10.9
large gap13.31.611.31.316.92.331.12.711.84.516.30.9
very large gap0.70.42.40.61.90.81.00.64.02.81.60.3
total100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap53.913.8.0.037.18.227.43.425.87.429.92.9
small gap23.011.7.0.028.67.619.43.020.06.821.02.5
medium gap.0.0.0.011.45.428.63.425.77.424.32.7
large gap23.111.7.0.020.06.822.33.125.87.422.52.6
very large gap.0.0.0.02.92.82.31.12.92.82.30.9
total100.0..0.0100.0.100.0.100.0.100.0.
outside perimeterno gap54.65.358.07.041.53.024.52.147.33.238.21.5
small gap19.34.224.16.120.62.523.12.020.32.521.51.2
medium gap15.93.96.03.419.12.420.72.013.22.117.51.1
large gap10.23.212.04.616.52.329.12.218.72.521.21.2
very large gap.0.0.0.02.20.92.60.80.40.41.60.4
total100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap59.12.160.71.940.72.125.31.445.02.744.30.9
small gap16.81.615.21.421.81.721.71.419.62.219.20.7
medium gap10.41.310.61.218.51.622.61.415.82.016.20.7
large gap13.11.511.31.316.91.628.51.518.42.118.60.7
very large gap0.60.32.20.62.10.62.00.51.20.61.70.2
total100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151188/137568
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