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NFI4b
number of forest plots
rockfall 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 2009/13
production region
JuraPlateauPre-AlpsAlpsSouthern AlpsSwitzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %±
n/ano gap41.12.434.22.024.52.714.52.041.06.931.21.1
small gap35.82.339.32.033.02.929.12.623.66.035.01.2
medium gap10.61.513.71.419.52.523.02.417.75.415.60.9
large gap11.81.611.01.322.62.632.82.717.75.417.20.9
very large gap0.70.41.90.60.40.40.70.5.0.01.00.2
total100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap22.213.9.0.025.015.334.46.134.48.832.34.5
small gap22.113.8100.0.25.015.326.25.627.58.326.84.3
medium gap33.415.7.0.037.517.113.14.317.27.017.73.7
large gap22.213.9.0.012.511.724.75.520.87.622.24.0
very large gap.0.0.0.0.0.01.61.6.0.00.90.9
total100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap41.55.134.06.724.42.516.81.631.52.924.31.2
small gap38.35.052.07.134.82.829.42.037.43.034.01.3
medium gap9.63.06.03.419.42.322.11.812.52.117.81.1
large gap10.63.28.03.820.72.329.32.017.92.422.51.2
very large gap.0.0.0.00.70.52.40.70.80.61.40.3
total100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap40.92.134.21.924.51.817.21.333.22.628.40.8
small gap36.02.140.41.933.82.029.11.534.52.634.30.9
medium gap10.81.313.01.319.71.721.81.413.71.916.60.7
large gap11.81.410.71.221.51.730.11.518.12.119.60.7
very large gap0.60.31.70.50.50.31.80.40.60.41.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151259/137639
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