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NFI3
number of forest plots
rockfall SilvaProtect · area of largest gap (aerial photo, 5 classes)
unit of reference: protection forest region
unit: %
unit of evaluation: accessible forest without shrub forest NFI3/NFI4
grid: 1.4 x 1.4 km grid
state2004/06
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern Alps Switzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %±
n/ano gap52.81.115.91.219.01.56.61.010.71.27.51.027.10.5
small gap12.90.710.21.08.61.17.61.18.21.03.60.79.60.4
medium gap8.80.69.40.96.61.07.11.19.61.14.90.88.10.4
large gap10.30.79.60.99.91.28.41.215.41.35.10.89.90.4
very large gap1.50.30.80.30.90.40.40.30.60.30.30.20.90.1
total86.20.746.01.645.02.030.11.944.51.821.31.555.60.6
inside perimeterno gap0.30.11.20.32.60.61.70.50.80.33.20.61.30.1
small gap0.20.10.40.20.50.31.50.50.30.20.90.40.50.1
medium gap0.40.10.10.10.90.42.00.60.80.31.20.40.70.1
large gap0.00.00.50.21.60.50.90.40.50.31.60.50.60.1
very large gap0.0.0.10.10.20.20.0.0.10.10.30.20.10.0
total0.90.22.20.55.70.96.21.02.60.67.20.93.20.2
outside perimeterno gap7.90.617.61.221.31.615.91.56.80.931.01.714.70.4
small gap2.20.311.81.07.71.018.31.612.51.214.91.39.00.4
medium gap1.20.210.11.08.61.113.51.412.61.29.91.17.30.3
large gap1.50.311.01.09.91.215.41.519.81.514.41.39.40.4
very large gap0.0.1.30.41.90.50.60.31.30.41.20.40.80.1
total12.90.751.71.649.32.063.71.952.91.871.41.641.10.6
totalno gap61.11.034.71.542.81.924.21.818.31.441.71.743.10.6
small gap15.30.822.41.316.71.527.41.921.01.519.41.419.10.5
medium gap10.30.719.61.316.11.422.71.723.01.616.11.316.10.5
large gap11.90.721.11.321.41.624.71.835.71.821.11.519.90.5
very large gap1.50.32.20.53.00.70.90.42.00.51.70.51.80.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #885924/352256
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