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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: accessible forest without shrub forest NFI3/NFI4
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/ano gap40.81.736.11.522.81.916.11.429.53.630.30.8
small gap36.01.739.01.533.92.127.61.722.93.334.10.8
medium gap11.81.111.31.019.21.722.01.619.03.115.50.6
large gap10.61.111.81.022.51.833.41.828.13.518.90.7
very large gap0.90.31.70.41.60.60.80.30.60.61.30.2
total100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap20.59.20.0.25.515.527.04.334.16.528.23.3
small gap21.49.5100.0.25.815.723.84.131.06.326.23.2
medium gap47.711.50.0.35.916.922.64.114.74.823.33.1
large gap10.47.00.0.12.812.023.74.120.15.420.83.0
very large gap0.0.0.0.0.0.2.81.60.0.1.60.9
total100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap42.53.838.74.826.21.916.21.132.22.024.90.9
small gap36.63.746.74.937.42.131.01.433.72.034.11.0
medium gap13.92.62.91.717.41.620.31.214.81.517.20.8
large gap7.12.010.53.017.91.630.11.418.61.722.30.8
very large gap0.0.1.11.01.10.52.30.50.70.41.50.2
total100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap40.71.636.31.424.51.316.80.931.71.728.00.6
small gap35.81.539.81.435.61.529.31.031.21.733.90.6
medium gap12.81.110.60.918.41.221.10.915.71.316.40.5
large gap10.00.911.70.920.11.231.01.120.71.420.30.5
very large gap0.70.31.70.41.30.41.80.30.60.31.40.2
total100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #875966/342298
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