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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/a0.40.20.70.21.60.43.80.44.80.72.50.2
no gap33.21.532.61.412.91.09.40.67.80.917.50.4
small gap28.91.435.01.416.21.112.00.76.50.818.50.5
medium gap9.40.910.20.98.90.88.50.65.40.78.50.3
large gap8.40.910.80.910.40.912.40.75.80.710.20.4
very large gap0.70.31.50.40.70.30.40.10.20.10.70.1
total81.11.290.90.850.71.546.41.030.51.457.90.5
inside perimetern/a0.0.0.0.0.0.0.50.10.30.20.20.1
no gap0.40.20.0.0.20.11.30.21.90.40.80.1
small gap0.40.20.10.10.20.11.20.21.80.40.80.1
medium gap0.90.30.0.0.30.11.10.20.80.30.70.1
large gap0.20.10.0.0.10.11.20.21.20.40.60.1
very large gap0.0.0.0.0.0.0.10.10.0.0.00.0
total1.80.40.10.10.70.25.40.56.10.83.20.2
outside perimetern/a0.10.10.10.11.30.31.50.33.00.51.20.1
no gap7.30.83.40.512.41.08.10.619.81.39.60.4
small gap6.20.84.20.617.61.114.30.720.51.312.80.4
medium gap2.30.50.30.18.10.89.30.68.60.96.30.3
large gap1.20.30.90.38.70.813.80.711.11.08.40.3
very large gap0.0.0.10.10.50.21.10.20.40.20.60.1
total17.11.29.00.848.61.548.21.063.31.538.90.5
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 #875946/342278
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