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NFI4
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
state2009/17
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern Alps Switzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %±
n/ano gap32.91.010.21.011.21.24.00.85.40.86.30.916.90.5
small gap32.51.014.41.115.01.48.21.112.21.24.90.819.00.5
medium gap9.90.610.00.97.41.06.71.110.11.14.00.78.60.4
large gap9.70.611.11.010.71.211.01.316.21.46.00.810.50.4
very large gap1.20.20.40.20.80.40.20.20.60.30.10.10.70.1
total86.20.746.01.645.02.030.11.944.51.821.31.555.60.6
inside perimeterno gap0.20.11.30.41.40.51.00.40.50.32.50.60.90.1
small gap0.20.10.30.21.70.51.50.50.60.32.20.50.80.1
medium gap0.40.10.40.21.30.51.40.51.00.41.10.40.80.1
large gap0.10.10.30.21.20.42.10.60.40.21.40.40.70.1
very large gap0.0.0.0.0.10.10.20.20.10.10.0.0.00.0
total0.90.22.20.55.70.96.21.02.60.67.20.93.20.2
outside perimeterno gap5.30.511.71.014.01.49.41.26.80.923.01.510.20.4
small gap5.20.518.71.217.71.522.01.713.51.324.11.614.00.4
medium gap1.30.210.11.07.31.012.81.411.81.210.61.17.10.3
large gap1.10.210.31.09.71.218.21.619.31.513.31.29.10.4
very large gap0.10.10.80.30.60.31.20.51.60.50.50.30.60.1
total12.90.751.71.649.32.063.71.952.91.871.41.641.10.6
totalno gap38.41.023.21.326.51.714.51.512.71.231.71.728.00.6
small gap37.91.033.41.534.31.931.81.926.21.631.21.733.80.6
medium gap11.60.720.51.316.01.520.91.722.81.615.71.316.50.5
large gap10.90.721.71.321.61.631.21.936.01.820.71.420.30.5
very large gap1.20.21.20.31.60.51.60.52.30.60.60.31.40.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #885932/352264
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