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NFI4b
number of forest plots
avalanches 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
avalanches SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %±
n/ano gap38.72.434.71.923.32.212.94.610.82.840.66.731.01.1
small gap36.82.438.91.930.62.430.86.228.94.122.35.735.01.2
medium gap11.51.613.91.418.72.127.26.023.93.920.45.515.60.9
large gap12.41.610.71.227.12.427.36.035.64.416.75.117.20.9
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 gap53.813.8.0.032.74.67.53.22.72.710.95.119.92.5
small gap30.912.8.0.026.04.334.35.816.26.135.17.828.22.8
medium gap7.77.4.0.020.23.923.95.232.47.724.37.022.82.6
large gap7.77.4.0.017.33.732.95.843.28.229.87.526.32.7
very large gap.0.0.0.03.81.91.51.55.43.7.0.02.71.0
total100.0..0.0100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap39.85.135.55.522.72.019.23.511.22.934.43.026.21.3
small gap35.55.050.05.733.22.330.44.127.64.236.83.034.51.4
medium gap11.83.45.32.618.71.922.43.725.04.011.52.016.61.1
large gap12.93.59.23.324.22.127.24.033.64.416.62.321.71.2
very large gap.0.0.0.01.20.50.80.82.61.50.80.61.00.3
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 #151262/137642
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