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NFI3
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 NFI3/NFI4
grid: 1.4 x 1.4 km grid
state2004/06
production region
JuraPlateauPre-AlpsAlpsSouthern Alps Switzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %±
n/ano gap59.41.762.71.539.02.139.11.651.13.351.50.8
small gap16.81.313.51.121.51.816.71.312.82.216.30.6
medium gap10.41.19.90.917.11.617.81.316.92.513.60.6
large gap12.81.211.31.020.21.725.21.518.22.517.00.6
very large gap0.50.32.60.52.10.61.10.41.00.71.60.2
total100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap31.210.6100.0.65.516.536.24.645.66.740.13.5
small gap21.89.60.0.10.810.315.83.512.74.515.22.6
medium gap41.911.30.0.0.0.24.14.116.75.122.53.0
large gap5.14.90.0.23.714.821.23.921.45.519.72.9
very large gap0.0.0.0.0.0.2.71.63.52.52.61.1
total100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap62.23.761.04.841.72.123.01.346.02.036.91.0
small gap15.72.820.44.021.01.723.81.319.81.721.50.8
medium gap11.12.45.92.319.31.720.71.213.31.417.40.8
large gap11.12.412.73.316.11.629.91.419.31.622.30.8
very large gap0.0.0.0.1.90.62.60.51.50.51.90.3
total100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap59.41.562.51.440.61.530.71.047.31.745.30.6
small gap16.71.214.11.021.11.220.30.917.51.318.30.5
medium gap11.11.09.60.918.11.219.60.914.41.215.40.5
large gap12.41.011.40.918.21.227.41.019.21.319.20.5
very large gap0.40.22.30.42.00.42.00.31.50.41.70.2
total100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #887312/353644
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