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NFI4b
number of forest plots
rockfall SilvaProtect · area of largest gap (aerial photo, 5 classes)
unit of reference: biogeographical region
unit: %
unit of evaluation: accessible forest without shrub forest NFI1/NFI2/NFI3/NFI4
grid: grid NFI4 2009-2013
state 2009/13
biogeographical region
JuraPlateauNorthern AlpsWestern Central-AlpsEastern Central-AlpsSouthern AlpsSwitzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %±
n/ano gap38.72.434.91.923.32.212.94.610.82.840.66.731.11.1
small gap36.82.438.81.930.62.430.86.228.94.122.35.735.01.2
medium gap11.51.613.81.418.72.127.26.023.93.920.45.515.60.9
large gap12.41.610.81.227.12.427.36.035.64.416.75.117.30.9
very large gap0.70.41.70.50.30.31.81.80.80.8.0.01.00.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap22.213.9.0.047.48.112.56.733.319.334.48.832.54.5
small gap22.413.950.035.426.37.124.98.833.319.327.58.326.84.3
medium gap33.315.750.035.47.94.424.98.816.715.217.27.017.53.7
large gap22.213.9.0.015.85.937.79.916.715.220.87.622.24.0
very large gap.0.0.0.02.62.6.0.0.0.0.0.00.90.9
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap43.35.035.15.422.91.915.52.88.22.331.02.924.31.2
small gap36.14.950.75.732.22.132.73.624.53.637.63.034.01.3
medium gap9.32.95.22.519.91.822.63.227.23.712.72.117.81.1
large gap11.33.29.13.323.41.928.03.536.74.018.02.422.61.2
very large gap.0.0.0.01.60.61.20.83.41.50.80.61.40.3
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap39.22.134.81.824.11.414.62.39.91.832.82.528.30.8
small gap36.42.140.11.831.31.631.53.026.62.734.32.634.30.9
medium gap11.41.412.91.318.91.323.92.725.52.614.31.916.60.7
large gap12.41.410.61.124.51.428.82.935.82.918.02.119.60.7
very large gap0.60.31.50.51.10.41.20.72.20.90.60.41.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151257/137637
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