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NFI4
number of forest plots
rockfall SilvaProtect · area of largest gap (aerial photo, 5 classes)
unit of reference: production region
unit: %
unit of evaluation: forest
grid: 1.4 x 1.4 km grid
state2009/17
production region
JuraPlateauPre-AlpsAlpsSouthern Alps Switzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %±
n/an/a0.50.20.70.33.10.78.20.815.72.14.30.3
no gap40.91.735.91.525.51.820.21.225.62.530.10.7
small gap35.71.738.51.532.01.925.91.321.32.432.00.7
medium gap11.61.111.21.017.51.618.21.217.72.214.70.6
large gap10.41.111.91.020.51.626.71.319.02.317.60.6
very large gap0.90.31.70.41.40.50.80.30.70.51.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.
inside perimetern/a0.0.0.0.0.0.8.72.55.02.86.51.7
no gap20.59.20.0.25.515.523.53.831.36.025.43.0
small gap21.49.5100.0.25.815.722.43.730.16.025.03.0
medium gap47.711.50.0.35.916.920.63.613.54.521.52.8
large gap10.47.00.0.12.812.022.43.720.15.220.22.8
very large gap0.0.0.0.0.0.2.41.30.0.1.40.8
total100.0.100.0.100.0.100.0.100.0.100.0.
outside perimetern/a0.50.51.01.02.60.73.20.54.70.83.10.3
no gap42.63.838.04.725.51.816.71.131.21.924.70.8
small gap36.23.646.84.936.12.029.81.432.41.932.90.9
medium gap13.72.62.91.616.71.619.31.213.51.416.30.7
large gap7.02.010.33.018.01.628.71.317.51.521.50.8
very large gap0.0.1.01.01.10.42.30.40.60.31.40.2
total100.0.100.0.100.0.100.0.100.0.100.0.
totaln/a0.50.20.80.32.80.55.80.58.10.93.90.2
no gap40.81.536.01.425.51.318.70.829.51.427.90.5
small gap35.51.539.31.433.91.427.60.928.91.532.10.6
medium gap12.61.010.50.917.31.118.90.814.81.115.60.4
large gap9.80.911.80.919.21.127.50.918.11.219.20.5
very large gap0.70.31.60.41.30.31.60.30.60.21.30.1
total100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #875971/342303
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