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NFI3
number of forest plots
protection forest perimeter SilvaProtect · area of largest gap (aerial photo, 5 classes)
unit of reference: economic region
unit: %
unit of evaluation: accessible forest without shrub forest NFI1/NFI2/NFI3/NFI4
grid: grid NFI4 2009-2013
state 2004/06
protection forest perimeter SilvaProtect
outside of perimeterinside perimetertotal
economic regionarea of largest gap (aerial photo, 5 classes) %± %± %±
Western Jurano gap57.62.753.95.356.82.4
small gap17.42.120.34.318.01.9
medium gap11.31.712.43.511.51.6
large gap13.11.913.53.613.21.7
very large gap0.60.4.0.00.50.3
total100.0.100.0.100.0.
Eastern Jurano gap68.54.657.113.267.24.3
small gap11.43.121.411.012.63.1
medium gap4.82.121.411.06.72.3
large gap14.33.4.0.012.63.1
very large gap1.01.0.0.00.80.8
total100.0.100.0.100.0.
Western Plateauno gap62.94.833.713.759.94.6
small gap14.63.541.014.217.43.5
medium gap6.82.58.48.17.02.4
large gap10.73.116.910.911.43.0
very large gap4.92.1.0.04.41.9
total100.0.100.0.100.0.
Central Plateauno gap59.33.563.610.359.73.3
small gap14.02.513.67.314.02.3
medium gap9.52.19.16.19.52.0
large gap16.12.613.67.315.92.5
very large gap1.00.7.0.00.90.6
total100.0.100.0.100.0.
Eastern Plateauno gap61.52.964.711.661.72.8
small gap14.82.123.510.315.32.0
medium gap13.42.0.0.012.71.9
large gap7.91.611.87.88.11.6
very large gap2.40.9.0.02.30.9
total100.0.100.0.100.0.
Western Pre-Alpsno gap27.86.939.65.935.04.5
small gap23.36.517.74.619.93.8
medium gap16.35.720.64.919.03.7
large gap27.96.917.74.621.73.9
very large gap4.73.24.42.54.52.0
total100.0.100.0.100.0.
Central Pre-Alpsno gap37.04.234.94.236.03.0
small gap22.23.626.43.924.22.6
medium gap23.03.618.63.420.82.5
large gap17.03.220.23.518.62.4
very large gap0.70.7.0.00.40.4
total100.0.100.0.100.0.
Eastern Pre-Alpsno gap51.85.549.14.850.33.6
small gap21.74.518.23.719.72.9
medium gap13.23.716.43.515.02.6
large gap10.83.412.73.211.92.3
very large gap2.41.73.61.83.11.3
total100.0.100.0.100.0.
Northwestern Alpsno gap34.06.730.14.531.43.8
small gap22.05.920.44.020.93.3
medium gap18.05.416.53.717.03.0
large gap26.06.228.14.427.43.6
very large gap.0.04.92.13.31.4
total100.0.100.0.100.0.
Central Alpsno gap33.49.146.18.240.76.2
small gap18.47.516.26.117.14.7
medium gap11.36.216.26.114.14.4
large gap33.19.121.66.826.55.5
very large gap3.73.6.0.01.61.6
total100.0.100.0.100.0.
Northeastern Alpsno gap45.510.736.26.338.75.5
small gap13.67.310.44.011.33.5
medium gap9.16.215.54.813.73.9
large gap31.810.029.36.030.05.1
very large gap.0.08.63.76.22.7
total100.0.100.0.100.0.
Southwestern Alpsno gap27.85.726.03.026.42.7
small gap23.05.425.93.025.32.6
medium gap24.75.527.83.127.12.7
large gap22.95.419.82.720.52.4
very large gap1.61.60.50.50.70.5
total100.0.100.0.100.0.
Southeastern Alpsno gap16.53.115.02.615.62.0
small gap21.43.423.23.022.42.3
medium gap25.53.624.73.125.12.4
large gap35.94.035.03.435.42.6
very large gap0.70.72.11.01.50.7
total100.0.100.0.100.0.
Southern Alpsno gap46.97.044.72.945.02.7
small gap15.75.120.32.419.62.2
medium gap21.65.814.72.115.82.0
large gap11.84.519.62.418.42.1
very large gap4.02.80.70.51.20.6
total100.0.100.0.100.0.
Switzerlandno gap50.61.236.51.344.20.9
small gap17.30.921.51.119.20.7
medium gap14.10.918.81.116.20.7
large gap16.30.921.51.118.60.7
very large gap1.70.31.80.41.70.2
total100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151161/137541
NFI3
number of forest plots
rockfall SilvaProtect · area of largest gap (aerial photo, 5 classes)
unit of reference: economic region
unit: %
unit of evaluation: accessible forest without shrub forest NFI1/NFI2/NFI3/NFI4
grid: grid NFI4 2009-2013
state 2004/06
rockfall SilvaProtect
n/ainside perimeteroutside perimetertotal
economic regionarea of largest gap (aerial photo, 5 classes) %± %± %± %±
Western Jurano gap57.62.737.317.155.55.556.82.4
small gap17.42.125.415.519.74.418.01.9
medium gap11.31.724.915.311.23.511.51.6
large gap13.11.912.411.713.63.813.21.7
very large gap0.60.4.0.0.0.00.50.3
total100.0.100.0.100.0.100.0.
Eastern Jurano gap68.54.6.0.061.513.567.24.3
small gap11.43.1.0.023.111.712.63.1
medium gap4.82.1100.0.15.410.06.72.3
large gap14.33.4.0.0.0.012.63.1
very large gap1.01.0.0.0.0.00.80.8
total100.0.100.0.100.0.100.0.
Western Plateauno gap62.94.8.0.033.713.759.94.6
small gap14.63.5.0.041.014.217.43.5
medium gap6.82.5.0.08.48.17.02.4
large gap10.73.1.0.016.910.911.43.0
very large gap4.92.1.0.0.0.04.41.9
total100.0..0.0100.0.100.0.
Central Plateauno gap59.33.5100.0.61.910.659.73.3
small gap14.02.5.0.014.37.714.02.3
medium gap9.52.1.0.09.56.49.52.0
large gap16.12.6.0.014.37.715.92.5
very large gap1.00.7.0.0.0.00.90.6
total100.0.100.0.100.0.100.0.
Eastern Plateauno gap61.52.9.0.064.711.661.72.8
small gap14.82.1.0.023.510.315.32.0
medium gap13.42.0.0.0.0.012.71.9
large gap7.91.6.0.011.87.88.11.6
very large gap2.40.9.0.0.0.02.30.9
total100.0..0.0100.0.100.0.
Western Pre-Alpsno gap27.86.9.0.040.26.035.04.5
small gap23.36.5100.0.16.54.519.93.8
medium gap16.35.7.0.020.95.019.03.7
large gap27.96.9.0.017.94.721.73.9
very large gap4.73.2.0.04.52.54.52.0
total100.0.100.0.100.0.100.0.
Central Pre-Alpsno gap37.04.250.025.034.44.236.03.0
small gap22.23.6.0.027.24.024.22.6
medium gap23.03.6.0.019.23.520.82.5
large gap17.03.250.025.019.23.518.62.4
very large gap0.70.7.0.0.0.00.40.4
total100.0.100.0.100.0.100.0.
Eastern Pre-Alpsno gap51.85.5100.0.47.74.850.33.6
small gap21.74.5.0.018.73.819.72.9
medium gap13.23.7.0.016.83.615.02.6
large gap10.83.4.0.013.13.311.92.3
very large gap2.41.7.0.03.71.83.11.3
total100.0.100.0.100.0.100.0.
Northwestern Alpsno gap34.06.758.314.326.44.631.43.8
small gap22.05.916.710.820.94.320.93.3
medium gap18.05.4.0.018.74.117.03.0
large gap26.06.216.710.829.74.827.43.6
very large gap.0.08.38.04.42.23.31.4
total100.0.100.0.100.0.100.0.
Central Alpsno gap33.49.160.015.540.99.540.76.2
small gap18.47.520.012.714.86.817.14.7
medium gap11.36.210.09.518.57.514.14.4
large gap33.19.110.09.525.88.526.55.5
very large gap3.73.6.0.0.0.01.61.6
total100.0.100.0.100.0.100.0.
Northeastern Alpsno gap45.510.744.416.634.76.838.75.5
small gap13.67.311.110.510.24.311.33.5
medium gap9.16.211.110.516.35.313.73.9
large gap31.810.022.213.930.66.630.05.1
very large gap.0.011.110.58.23.96.22.7
total100.0.100.0.100.0.100.0.
Southwestern Alpsno gap27.85.720.88.326.63.226.42.7
small gap23.05.424.98.826.13.225.32.6
medium gap24.75.537.49.926.63.227.12.7
large gap22.95.416.97.720.22.920.52.4
very large gap1.61.6.0.00.50.50.70.5
total100.0.100.0.100.0.100.0.
Southeastern Alpsno gap16.53.133.319.314.42.615.62.0
small gap21.43.4.0.023.93.122.42.3
medium gap25.53.650.020.423.93.125.12.4
large gap35.94.016.715.235.63.535.42.6
very large gap0.70.7.0.02.11.11.50.7
total100.0.100.0.100.0.100.0.
Southern Alpsno gap46.97.041.39.145.13.145.02.7
small gap15.75.117.27.020.62.519.62.2
medium gap21.65.817.27.014.42.215.82.0
large gap11.84.524.28.019.12.518.42.1
very large gap4.02.8.0.00.80.51.20.6
total100.0.100.0.100.0.100.0.
Switzerlandno gap50.61.241.64.736.01.344.20.9
small gap17.30.917.63.721.81.219.20.7
medium gap14.10.920.33.918.61.116.20.7
large gap16.30.918.63.821.81.218.60.7
very large gap1.70.31.91.31.80.41.70.2
total100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151162/137542
NFI3
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 2004/06
biogeographical region
JuraPlateauNorthern AlpsWestern Central-AlpsEastern Central-AlpsSouthern AlpsSwitzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %±
n/ano gap55.82.463.21.936.62.629.06.116.53.446.16.850.51.2
small gap17.91.913.61.421.92.221.95.620.73.714.84.817.30.9
medium gap10.71.510.51.218.62.123.85.824.73.922.35.714.20.9
large gap14.61.710.61.220.82.223.65.738.14.413.04.616.40.9
very large gap1.00.52.00.62.00.81.81.8.0.03.82.61.70.3
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap33.315.7100.0.55.38.120.88.333.319.341.39.141.84.7
small gap22.413.9.0.015.85.924.98.8.0.017.27.017.53.7
medium gap33.315.7.0.05.33.637.49.950.020.417.27.020.23.8
large gap11.110.5.0.018.46.316.97.716.715.224.28.018.63.8
very large gap.0.0.0.05.33.6.0.0.0.0.0.01.91.3
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap56.75.061.05.633.52.125.63.414.32.944.43.136.01.3
small gap18.63.916.94.320.91.826.83.426.53.620.32.521.81.2
medium gap12.43.36.52.819.31.827.43.423.83.515.02.218.61.1
large gap12.43.314.34.023.41.919.63.133.33.919.62.521.81.2
very large gap.0.01.31.33.00.80.60.62.01.20.80.51.80.4
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap55.62.263.11.835.71.625.92.815.72.244.42.744.20.9
small gap18.11.713.91.321.11.425.52.823.42.619.22.119.20.7
medium gap11.41.410.01.118.41.327.52.824.82.616.32.016.20.7
large gap14.11.511.01.222.11.420.22.635.02.918.92.118.70.7
very large gap0.80.41.90.52.70.50.80.61.10.61.20.61.70.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151182/137562
NFI3
number of forest plots
rockfall SilvaProtect · area of largest gap (aerial photo, 5 classes)
unit of reference: canton
unit: %
unit of evaluation: accessible forest without shrub forest NFI1/NFI2/NFI3/NFI4
grid: grid NFI4 2009-2013
state 2004/06
rockfall SilvaProtect
n/ainside perimeteroutside perimetertotal
cantonarea of largest gap (aerial photo, 5 classes) %± %± %± %±
AGno gap63.64.4.0.033.327.362.84.4
small gap11.02.9.0.033.327.311.62.9
medium gap9.32.7.0.0.0.09.12.6
large gap13.63.2.0.033.327.314.03.2
very large gap2.51.5.0.0.0.02.51.4
total100.0..0.0100.0.100.0.
AIno gap80.018.4.0.050.016.160.013.0
small gap.0.0.0.030.014.920.010.6
medium gap.0.0.0.0.0.0.0.0
large gap20.018.4.0.020.013.020.010.6
very large gap.0.0.0.0.0.0.0.0
total100.0..0.0100.0.100.0.
ARno gap53.313.1.0.040.015.848.010.1
small gap33.312.4.0.020.012.928.09.1
medium gap6.76.6.0.030.014.816.07.5
large gap6.76.6.0.010.09.78.05.5
very large gap.0.0.0.0.0.0.0.0
total100.0..0.0100.0.100.0.
BEno gap48.33.143.612.436.03.442.82.3
small gap16.12.325.310.922.72.919.21.8
medium gap16.92.36.26.014.32.515.41.7
large gap18.42.424.910.824.63.021.31.9
very large gap0.40.4.0.02.51.11.30.5
total100.0.100.0.100.0.100.0.
BL/BSno gap64.77.9.0.055.616.761.67.2
small gap10.95.2.0.011.110.610.74.6
medium gap5.43.8100.0.22.214.010.74.6
large gap19.06.5.0.011.110.617.15.5
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
FRno gap50.76.2.0.046.67.549.04.8
small gap9.23.6.0.017.85.712.73.2
medium gap13.94.3.0.017.85.715.53.5
large gap20.05.0.0.013.35.117.33.6
very large gap6.23.0.0.04.43.15.52.2
total100.0..0.0100.0.100.0.
GEno gap100.0..0.0.0.0100.0.
small gap.0.0.0.0.0.0.0.0
medium gap.0.0.0.0.0.0.0.0
large gap.0.0.0.0.0.0.0.0
very large gap.0.0.0.0.0.0.0.0
total100.0..0.0.0.0100.0.
GLno gap53.313.042.918.942.111.446.37.9
small gap6.76.514.313.310.57.19.84.7
medium gap6.76.514.313.310.57.19.84.7
large gap33.312.328.617.231.610.831.77.3
very large gap.0.0.0.05.35.22.42.4
total100.0.100.0.100.0.100.0.
GRno gap15.92.926.611.416.12.416.41.8
small gap21.13.36.66.422.92.721.62.0
medium gap27.43.633.212.225.02.826.22.2
large gap34.43.833.512.234.33.134.32.4
very large gap1.30.9.0.01.70.81.50.6
total100.0.100.0.100.0.100.0.
JUno gap66.86.266.727.340.79.558.75.2
small gap13.94.633.327.425.98.518.34.2
medium gap7.03.4.0.018.57.510.43.3
large gap12.34.4.0.014.86.912.73.6
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
LUno gap47.84.9.0.031.810.045.04.5
small gap26.14.3.0.018.28.324.73.9
medium gap10.63.0.0.040.910.515.93.3
large gap15.53.6.0.09.16.214.43.1
very large gap.0.0.0.0.0.0.0.0
total100.0..0.0100.0.100.0.
NEno gap50.76.0.0.092.96.757.65.4
small gap23.85.1.0.07.16.921.14.4
medium gap18.24.6.0.0.0.015.23.9
large gap5.62.7.0.0.0.04.72.3
very large gap1.71.7.0.0.0.01.41.4
total100.0..0.0100.0.100.0.
NWno gap40.015.8100.0.16.715.535.311.8
small gap20.012.9.0.050.020.829.411.3
medium gap20.012.9.0.0.0.011.88.0
large gap20.012.9.0.033.319.623.510.5
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
OWno gap32.19.450.035.729.29.431.46.6
small gap12.06.6.0.029.29.419.65.6
medium gap24.18.6.0.016.77.719.65.6
large gap24.18.650.035.725.08.925.56.1
very large gap7.75.2.0.0.0.03.82.6
total100.0.100.0.100.0.100.0.
SGno gap47.26.975.021.746.25.647.54.3
small gap22.75.8.0.017.54.319.03.4
medium gap18.85.4.0.017.54.317.53.3
large gap9.44.0.0.015.04.012.42.8
very large gap1.91.925.021.73.82.13.71.6
total100.0.100.0.100.0.100.0.
SHno gap73.57.5.0.050.035.872.27.4
small gap5.94.1.0.050.035.88.34.7
medium gap8.84.9.0.0.0.08.34.7
large gap11.85.6.0.0.0.011.15.3
very large gap.0.0.0.0.0.0.0.0
total100.0..0.0100.0.100.0.
SOno gap67.55.450.035.575.021.767.55.2
small gap7.83.1.0.0.0.07.22.9
medium gap6.52.850.035.525.021.88.43.1
large gap15.64.2.0.0.0.014.53.9
very large gap2.61.8.0.0.0.02.41.7
total100.0.100.0.100.0.100.0.
SZno gap41.98.9100.0.43.28.245.15.9
small gap19.47.1.0.010.85.114.14.1
medium gap9.75.3.0.021.76.815.54.3
large gap25.87.9.0.018.96.521.14.9
very large gap3.23.2.0.05.43.74.22.4
total100.0.100.0.100.0.100.0.
TGno gap68.56.0.0.070.014.568.75.6
small gap21.65.3.0.020.012.721.34.9
medium gap6.63.2.0.0.0.05.72.8
large gap1.71.7.0.010.09.52.82.0
very large gap1.71.7.0.0.0.01.41.4
total100.0..0.0100.0.100.0.
TIno gap58.87.950.011.250.23.551.43.1
small gap15.45.820.09.021.12.820.22.5
medium gap12.95.415.08.011.02.211.62.0
large gap10.34.915.08.016.82.615.72.2
very large gap2.72.6.0.01.00.71.10.7
total100.0.100.0.100.0.100.0.
URno gap33.612.350.017.835.510.837.57.4
small gap26.211.325.015.414.98.020.76.2
medium gap14.09.212.511.819.99.016.45.7
large gap26.211.312.511.829.810.325.36.6
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
VDno gap53.23.650.035.440.46.850.43.2
small gap22.93.0.0.023.05.822.72.7
medium gap8.32.0.0.021.25.711.02.0
large gap13.52.5.0.015.45.013.82.2
very large gap2.11.050.035.4.0.02.00.9
total100.0.100.0.100.0.100.0.
VSno gap27.85.720.88.326.63.226.42.7
small gap23.05.424.98.826.13.225.32.6
medium gap24.75.537.49.926.63.227.12.7
large gap22.95.416.97.720.22.920.52.4
very large gap1.61.6.0.00.50.50.70.5
total100.0.100.0.100.0.100.0.
ZGno gap75.022.3.0.033.316.246.214.3
small gap25.022.4.0.033.316.230.813.2
medium gap.0.0.0.0.0.0.0.0
large gap.0.0.0.011.110.87.77.7
very large gap.0.0.0.022.214.315.410.4
total100.0..0.0100.0.100.0.
ZHno gap59.74.2.0.075.021.760.14.1
small gap12.22.8.0.0.0.011.92.7
medium gap17.33.2.0.0.0.016.83.1
large gap8.62.4.0.025.021.79.12.4
very large gap2.21.2.0.0.0.02.11.2
total100.0..0.0100.0.100.0.
Switzerlandno gap50.81.241.94.836.11.344.40.9
small gap17.10.917.43.621.81.219.00.7
medium gap14.00.820.33.918.61.116.10.7
large gap16.40.918.53.721.71.218.70.7
very large gap1.70.31.91.41.80.41.80.2
total100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151183/137563
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 without shrub forest NFI1/NFI2/NFI3/NFI4
grid: grid NFI4 2009-2013
state 2004/06
production region
JuraPlateauPre-AlpsAlpsSouthern AlpsSwitzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %±
n/ano gap60.32.461.12.040.23.025.22.546.97.050.61.2
small gap15.91.814.51.422.22.620.92.315.75.117.30.9
medium gap9.71.411.01.318.82.421.72.421.65.814.10.9
large gap13.41.611.11.316.92.331.12.711.84.516.30.9
very large gap0.70.42.40.61.90.81.00.64.02.81.60.3
total100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap33.415.7100.0.62.517.139.36.341.39.141.74.7
small gap22.113.8.0.012.511.718.04.917.27.017.63.7
medium gap33.415.7.0.0.0.022.95.417.27.020.33.9
large gap11.110.5.0.025.015.316.54.824.28.018.63.8
very large gap.0.0.0.0.0.03.32.3.0.01.81.3
total100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap56.45.156.07.040.52.823.81.845.13.136.11.4
small gap20.24.124.16.121.72.422.51.820.62.521.81.2
medium gap11.73.36.03.418.72.323.01.814.42.218.61.1
large gap11.73.314.04.916.72.228.41.919.12.521.71.2
very large gap.0.0.0.02.30.92.40.70.80.51.80.4
total100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap59.12.160.71.940.72.125.31.445.02.744.30.9
small gap16.81.615.21.421.81.721.71.419.62.219.20.7
medium gap10.41.310.61.218.51.622.61.415.82.016.20.7
large gap13.11.511.31.316.91.628.51.518.42.118.60.7
very large gap0.60.32.20.62.10.62.00.51.20.61.70.2
total100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151184/137564
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 NFI1/NFI2/NFI3/NFI4
grid: grid NFI4 2009-2013
state 2004/06
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern AlpsSwitzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %±
n/ano gap60.71.534.63.246.84.327.85.716.53.146.97.050.51.2
small gap15.11.122.42.819.63.523.05.421.43.415.75.117.30.9
medium gap10.41.020.62.712.22.924.75.525.53.621.65.814.20.9
large gap12.11.021.12.719.23.522.95.435.94.011.84.516.30.9
very large gap1.70.41.30.82.31.31.61.60.70.74.02.81.60.3
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap39.915.552.912.159.110.520.88.333.319.341.39.141.74.7
small gap20.112.717.69.313.67.324.98.8.0.017.27.017.63.7
medium gap30.014.5.0.09.16.137.49.950.020.417.27.020.23.8
large gap10.09.523.510.313.67.316.97.716.715.224.28.018.63.8
very large gap.0.05.95.74.54.4.0.0.0.0.0.01.91.3
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap56.24.133.22.843.13.726.63.214.42.645.13.136.01.3
small gap21.53.422.62.515.82.726.13.223.93.120.62.521.81.2
medium gap9.72.519.42.416.92.826.63.223.93.114.42.218.61.1
large gap12.52.822.32.519.93.020.22.935.63.519.12.521.81.2
very large gap.0.02.50.94.41.50.50.52.11.10.80.51.80.4
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap60.01.434.52.145.62.726.42.715.62.045.02.744.20.9
small gap15.91.122.31.817.22.125.32.622.42.319.62.219.20.7
medium gap10.50.919.31.714.51.927.12.725.12.415.82.016.20.7
large gap12.11.021.81.819.22.220.52.435.42.618.42.118.70.7
very large gap1.40.32.10.63.51.00.70.51.50.71.20.61.70.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151185/137565
NFI3
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 2004/06
biogeographical region
JuraPlateauNorthern AlpsWestern Central-AlpsEastern Central-AlpsSouthern AlpsSwitzerland
avalanches SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %±
n/ano gap55.82.463.11.936.62.629.06.116.53.446.16.850.51.2
small gap17.91.913.71.421.92.221.95.620.73.714.84.817.40.9
medium gap10.71.510.41.218.62.123.85.824.73.922.35.714.10.9
large gap14.61.710.71.220.82.223.65.738.14.413.04.616.40.9
very large gap1.00.52.00.62.00.81.81.8.0.03.82.61.70.3
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap53.813.8.0.039.44.819.44.818.96.424.47.130.02.9
small gap23.211.7.0.021.14.023.95.216.26.118.96.420.92.5
medium gap.0.0.0.017.33.732.85.732.47.729.77.524.32.7
large gap23.011.7.0.018.33.824.05.229.77.524.47.122.52.6
very large gap.0.0.0.03.81.9.0.02.72.72.72.72.30.9
total100.0..0.0100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap54.85.263.15.534.02.328.04.013.83.247.03.138.01.5
small gap18.34.015.84.220.41.928.04.028.44.220.22.521.51.2
medium gap16.13.86.62.818.51.926.43.922.43.913.12.117.51.1
large gap10.83.213.23.924.12.116.83.333.64.419.42.521.31.2
very large gap.0.01.31.33.00.80.80.81.71.20.40.41.70.4
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap55.62.263.11.835.71.625.92.815.72.244.42.744.20.9
small gap18.11.713.91.321.11.425.52.823.42.619.22.119.20.7
medium gap11.41.410.01.118.41.327.52.824.82.616.32.016.20.7
large gap14.11.511.01.222.11.420.22.635.02.918.92.118.70.7
very large gap0.80.41.90.52.70.50.80.61.10.61.20.61.70.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151186/137566
NFI3
number of forest plots
avalanches SilvaProtect · area of largest gap (aerial photo, 5 classes)
unit of reference: canton
unit: %
unit of evaluation: accessible forest without shrub forest NFI1/NFI2/NFI3/NFI4
grid: grid NFI4 2009-2013
state 2004/06
avalanches SilvaProtect
n/ainside perimeteroutside perimetertotal
cantonarea of largest gap (aerial photo, 5 classes) %± %± %± %±
AGno gap62.84.4.0.0.0.062.84.4
small gap11.62.9.0.0.0.011.62.9
medium gap9.12.6.0.0.0.09.12.6
large gap14.03.2.0.0.0.014.03.2
very large gap2.51.4.0.0.0.02.51.4
total100.0..0.0.0.0100.0.
AIno gap80.018.433.328.057.119.160.013.0
small gap.0.033.328.028.617.520.010.6
medium gap.0.0.0.0.0.0.0.0
large gap20.018.433.328.014.313.620.010.6
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
ARno gap53.313.1.0.044.416.848.010.1
small gap33.312.4100.0.11.110.728.09.1
medium gap6.76.6.0.033.316.016.07.5
large gap6.76.6.0.011.110.78.05.5
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
BEno gap48.33.139.17.635.93.642.82.3
small gap16.12.317.25.924.23.219.21.8
medium gap16.92.319.46.212.42.515.41.7
large gap18.42.419.46.225.83.321.31.9
very large gap0.40.44.93.41.71.01.30.5
total100.0.100.0.100.0.100.0.
BL/BSno gap64.77.9.0.050.015.961.67.2
small gap10.95.2.0.010.09.610.74.6
medium gap5.43.8.0.030.014.610.74.6
large gap19.06.5.0.010.09.617.15.5
very large gap.0.0.0.0.0.0.0.0
total100.0..0.0100.0.100.0.
FRno gap50.76.233.327.347.67.749.04.8
small gap9.23.633.327.316.75.812.73.2
medium gap13.94.3.0.019.16.115.53.5
large gap20.05.0.0.014.35.417.33.6
very large gap6.23.033.327.32.42.45.52.2
total100.0.100.0.100.0.100.0.
GEno gap100.0..0.0.0.0100.0.
small gap.0.0.0.0.0.0.0.0
medium gap.0.0.0.0.0.0.0.0
large gap.0.0.0.0.0.0.0.0
very large gap.0.0.0.0.0.0.0.0
total100.0..0.0.0.0100.0.
GLno gap53.313.050.015.937.512.246.37.9
small gap6.76.5.0.018.89.89.84.7
medium gap6.76.510.09.612.58.39.84.7
large gap33.312.340.015.625.010.931.77.3
very large gap.0.0.0.06.36.12.42.4
total100.0.100.0.100.0.100.0.
GRno gap15.92.919.65.315.92.616.41.8
small gap21.13.316.14.923.63.021.62.0
medium gap27.43.635.76.422.63.026.22.2
large gap34.43.826.85.936.43.434.32.4
very large gap1.30.91.81.81.50.91.50.6
total100.0.100.0.100.0.100.0.
JUno gap66.86.2.0.046.49.458.75.2
small gap13.94.6.0.028.68.618.34.2
medium gap7.03.4.0.017.97.310.43.3
large gap12.34.4100.0.7.14.912.73.6
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
LUno gap47.84.9.0.035.010.745.04.5
small gap26.14.350.035.515.08.024.73.9
medium gap10.63.050.035.540.011.015.93.3
large gap15.53.6.0.010.06.714.43.1
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
NEno gap50.76.0100.0.90.98.557.65.4
small gap23.85.1.0.09.18.721.14.4
medium gap18.24.6.0.0.0.015.23.9
large gap5.62.7.0.0.0.04.72.3
very large gap1.71.7.0.0.0.01.41.4
total100.0.100.0.100.0.100.0.
NWno gap40.015.8.0.050.025.535.311.8
small gap20.012.933.327.850.025.529.411.3
medium gap20.012.9.0.0.0.011.88.0
large gap20.012.966.727.7.0.023.510.5
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
OWno gap32.19.440.022.128.69.931.46.6
small gap12.06.640.022.123.89.419.65.6
medium gap24.18.6.0.019.08.619.65.6
large gap24.18.620.018.128.69.925.56.1
very large gap7.75.2.0.0.0.03.82.6
total100.0.100.0.100.0.100.0.
SGno gap47.26.950.015.847.35.847.54.3
small gap22.75.820.012.716.24.319.03.4
medium gap18.85.410.09.517.64.417.53.3
large gap9.44.010.09.514.94.112.42.8
very large gap1.91.910.09.54.12.33.71.6
total100.0.100.0.100.0.100.0.
SHno gap73.57.5.0.050.035.872.27.4
small gap5.94.1.0.050.035.88.34.7
medium gap8.84.9.0.0.0.08.34.7
large gap11.85.6.0.0.0.011.15.3
very large gap.0.0.0.0.0.0.0.0
total100.0..0.0100.0.100.0.
SOno gap67.55.4.0.066.719.367.55.2
small gap7.83.1.0.0.0.07.22.9
medium gap6.52.8.0.033.319.38.43.1
large gap15.64.2.0.0.0.014.53.9
very large gap2.61.8.0.0.0.02.41.7
total100.0..0.0100.0.100.0.
SZno gap41.98.950.020.547.08.645.15.9
small gap19.47.116.715.38.84.914.14.1
medium gap9.75.316.715.320.67.015.54.3
large gap25.87.916.715.317.66.621.14.9
very large gap3.23.2.0.05.94.14.22.4
total100.0.100.0.100.0.100.0.
TGno gap68.56.0.0.070.014.568.75.6
small gap21.65.3.0.020.012.721.34.9
medium gap6.63.2.0.0.0.05.72.8
large gap1.71.7.0.010.09.52.82.0
very large gap1.71.7.0.0.0.01.41.4
total100.0..0.0100.0.100.0.
TIno gap58.87.930.59.652.43.551.43.1
small gap15.45.821.78.620.92.820.22.5
medium gap12.95.421.78.610.22.111.62.0
large gap10.34.921.78.616.02.615.72.2
very large gap2.72.64.34.30.50.51.10.7
total100.0.100.0.100.0.100.0.
URno gap33.612.333.315.842.511.437.57.4
small gap26.211.333.315.810.47.020.76.2
medium gap14.09.222.213.915.78.416.45.7
large gap26.211.311.110.531.310.725.36.6
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
VDno gap53.23.650.015.838.67.450.43.2
small gap22.93.030.014.520.46.122.72.7
medium gap8.32.010.09.522.86.311.02.0
large gap13.52.510.09.516.05.513.82.2
very large gap2.11.0.0.02.32.32.00.9
total100.0.100.0.100.0.100.0.
VSno gap27.85.721.14.828.43.826.42.7
small gap23.05.423.95.126.93.725.32.6
medium gap24.75.532.45.625.53.727.12.7
large gap22.95.422.65.018.43.320.52.4
very large gap1.61.6.0.00.70.70.70.5
total100.0.100.0.100.0.100.0.
ZGno gap75.022.3.0.033.316.246.214.3
small gap25.022.4.0.033.316.230.813.2
medium gap.0.0.0.0.0.0.0.0
large gap.0.0.0.011.110.87.77.7
very large gap.0.0.0.022.214.315.410.4
total100.0..0.0100.0.100.0.
ZHno gap59.74.2.0.075.021.760.14.1
small gap12.22.8.0.0.0.011.92.7
medium gap17.33.2.0.0.0.016.83.1
large gap8.62.4.0.025.021.79.12.4
very large gap2.21.2.0.0.0.02.11.2
total100.0..0.0100.0.100.0.
Switzerlandno gap50.81.230.02.938.11.544.40.9
small gap17.10.920.82.521.61.219.00.7
medium gap14.00.824.22.717.51.116.10.7
large gap16.40.922.72.621.21.218.70.7
very large gap1.70.32.40.91.70.41.80.2
total100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151187/137567
NFI3
number of forest plots
avalanches SilvaProtect · area of largest gap (aerial photo, 5 classes)
unit of reference: production region
unit: %
unit of evaluation: accessible forest without shrub forest NFI1/NFI2/NFI3/NFI4
grid: grid NFI4 2009-2013
state 2004/06
production region
JuraPlateauPre-AlpsAlpsSouthern AlpsSwitzerland
avalanches SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %±
n/ano gap60.22.361.02.040.23.025.22.546.97.050.51.2
small gap16.11.814.51.422.22.620.92.315.75.117.40.9
medium gap9.71.410.91.318.82.421.72.421.65.814.10.9
large gap13.31.611.31.316.92.331.12.711.84.516.30.9
very large gap0.70.42.40.61.90.81.00.64.02.81.60.3
total100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap53.913.8.0.037.18.227.43.425.87.429.92.9
small gap23.011.7.0.028.67.619.43.020.06.821.02.5
medium gap.0.0.0.011.45.428.63.425.77.424.32.7
large gap23.111.7.0.020.06.822.33.125.87.422.52.6
very large gap.0.0.0.02.92.82.31.12.92.82.30.9
total100.0..0.0100.0.100.0.100.0.100.0.
outside perimeterno gap54.65.358.07.041.53.024.52.147.33.238.21.5
small gap19.34.224.16.120.62.523.12.020.32.521.51.2
medium gap15.93.96.03.419.12.420.72.013.22.117.51.1
large gap10.23.212.04.616.52.329.12.218.72.521.21.2
very large gap.0.0.0.02.20.92.60.80.40.41.60.4
total100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap59.12.160.71.940.72.125.31.445.02.744.30.9
small gap16.81.615.21.421.81.721.71.419.62.219.20.7
medium gap10.41.310.61.218.51.622.61.415.82.016.20.7
large gap13.11.511.31.316.91.628.51.518.42.118.60.7
very large gap0.60.32.20.62.10.62.00.51.20.61.70.2
total100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151188/137568
NFI3
number of forest plots
avalanches SilvaProtect · area of largest gap (aerial photo, 5 classes)
unit of reference: protection forest region
unit: %
unit of evaluation: accessible forest without shrub forest NFI1/NFI2/NFI3/NFI4
grid: grid NFI4 2009-2013
state 2004/06
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern AlpsSwitzerland
avalanches SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %±
n/ano gap60.61.534.63.246.84.327.85.716.53.146.97.050.51.2
small gap15.21.122.42.819.63.523.05.421.43.415.75.117.40.9
medium gap10.41.020.62.712.22.924.75.525.53.621.65.814.10.9
large gap12.11.021.12.719.23.522.95.435.94.011.84.516.40.9
very large gap1.70.41.30.82.31.31.61.60.70.74.02.81.60.3
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap53.813.835.76.443.68.021.14.820.56.125.87.429.92.8
small gap23.211.721.45.520.56.523.95.115.95.520.06.820.92.5
medium gap.0.017.95.112.85.432.45.636.47.325.77.424.32.7
large gap23.111.719.65.320.56.522.65.025.06.525.87.422.52.6
very large gap.0.05.43.02.62.5.0.02.32.22.92.82.40.9
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap55.84.234.03.045.13.928.43.813.42.847.33.238.01.5
small gap21.03.522.52.714.42.726.93.725.33.620.32.521.61.2
medium gap12.32.818.42.516.82.925.53.721.33.313.22.117.51.1
large gap10.92.623.02.718.93.118.43.338.04.018.72.521.31.2
very large gap.0.02.00.94.81.70.70.72.01.10.40.41.60.4
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap60.01.434.52.145.62.726.42.715.62.045.02.744.20.9
small gap15.91.122.31.817.22.125.32.622.42.319.62.219.20.7
medium gap10.50.919.31.714.51.927.12.725.12.415.82.016.20.7
large gap12.11.021.81.819.22.220.52.435.42.618.42.118.70.7
very large gap1.40.32.10.63.51.00.70.51.50.71.20.61.70.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151189/137569
NFI3
number of forest plots
avalanches SilvaProtect · area of largest gap (aerial photo, 5 classes)
unit of reference: economic region
unit: %
unit of evaluation: accessible forest without shrub forest NFI1/NFI2/NFI3/NFI4
grid: grid NFI4 2009-2013
state 2004/06
avalanches SilvaProtect
n/ainside perimeteroutside perimetertotal
economic regionarea of largest gap (aerial photo, 5 classes) %± %± %± %±
Western Jurano gap57.62.753.713.853.95.756.82.4
small gap17.42.123.311.819.74.618.01.9
medium gap11.31.7.0.014.54.111.51.6
large gap13.11.923.011.711.83.713.21.7
very large gap0.60.4.0.0.0.00.50.3
total100.0.100.0.100.0.100.0.
Eastern Jurano gap68.24.5.0.058.314.367.24.3
small gap12.23.2.0.016.710.812.63.1
medium gap4.72.1.0.025.012.56.72.3
large gap14.03.4.0.0.0.012.63.1
very large gap0.90.9.0.0.0.00.80.8
total100.0..0.0100.0.100.0.
Western Plateauno gap62.94.8.0.033.713.759.94.6
small gap14.63.5.0.041.014.217.43.5
medium gap6.82.5.0.08.48.17.02.4
large gap10.73.1.0.016.910.911.43.0
very large gap4.92.1.0.0.0.04.41.9
total100.0..0.0100.0.100.0.
Central Plateauno gap59.33.5.0.063.610.359.73.3
small gap14.02.5.0.013.67.314.02.3
medium gap9.52.1.0.09.16.19.52.0
large gap16.12.6.0.013.67.315.92.5
very large gap1.00.7.0.0.0.00.90.6
total100.0..0.0100.0.100.0.
Eastern Plateauno gap61.32.9.0.068.811.661.72.8
small gap14.72.1.0.025.010.815.32.0
medium gap13.42.0.0.0.0.012.71.9
large gap8.21.6.0.06.36.18.11.6
very large gap2.40.9.0.0.0.02.30.9
total100.0..0.0100.0.100.0.
Western Pre-Alpsno gap27.86.949.717.738.26.335.04.5
small gap23.36.525.115.416.74.819.93.8
medium gap16.35.7.0.023.45.519.03.7
large gap27.96.912.611.818.45.021.73.9
very large gap4.73.212.611.83.32.34.52.0
total100.0.100.0.100.0.100.0.
Central Pre-Alpsno gap37.04.226.310.136.44.636.03.0
small gap22.23.626.310.126.44.224.22.6
medium gap23.03.621.19.418.23.720.82.5
large gap17.03.226.310.119.13.818.62.4
very large gap0.70.7.0.0.0.00.40.4
total100.0.100.0.100.0.100.0.
Eastern Pre-Alpsno gap51.85.550.017.749.05.050.33.6
small gap21.74.537.517.116.73.719.72.9
medium gap13.23.7.0.017.63.815.02.6
large gap10.83.412.511.712.73.311.92.3
very large gap2.41.7.0.03.91.93.11.3
total100.0.100.0.100.0.100.0.
Northwestern Alpsno gap34.06.737.99.027.05.231.43.8
small gap22.05.917.27.021.64.820.93.3
medium gap18.05.420.77.514.94.117.03.0
large gap26.06.217.27.032.45.427.43.6
very large gap.0.06.94.74.12.33.31.4
total100.0.100.0.100.0.100.0.
Central Alpsno gap33.49.135.712.952.310.540.76.2
small gap18.47.528.612.18.75.917.14.7
medium gap11.36.221.411.013.07.014.14.4
large gap33.19.114.39.426.09.226.55.5
very large gap3.73.6.0.0.0.01.61.6
total100.0.100.0.100.0.100.0.
Northeastern Alpsno gap45.510.747.112.131.77.338.75.5
small gap13.67.35.95.712.25.111.33.5
medium gap9.16.211.87.817.15.913.73.9
large gap31.810.029.411.129.37.130.05.1
very large gap.0.05.95.79.74.66.22.7
total100.0.100.0.100.0.100.0.
Southwestern Alpsno gap27.85.721.14.828.43.826.42.7
small gap23.05.423.95.126.93.725.32.6
medium gap24.75.532.45.625.53.727.12.7
large gap22.95.422.65.018.43.320.52.4
very large gap1.61.6.0.00.70.70.70.5
total100.0.100.0.100.0.100.0.
Southeastern Alpsno gap16.53.120.56.113.42.815.62.0
small gap21.43.415.95.525.33.622.42.3
medium gap25.53.636.47.321.33.325.12.4
large gap35.94.025.06.538.04.035.42.6
very large gap0.70.72.32.22.01.11.50.7
total100.0.100.0.100.0.100.0.
Southern Alpsno gap46.97.025.87.447.33.245.02.7
small gap15.75.120.06.820.32.519.62.2
medium gap21.65.825.77.413.22.115.82.0
large gap11.84.525.87.418.72.518.42.1
very large gap4.02.82.92.80.40.41.20.6
total100.0.100.0.100.0.100.0.
Switzerlandno gap50.61.230.02.938.01.544.20.9
small gap17.40.920.92.521.61.219.20.7
medium gap14.10.924.32.717.51.216.20.7
large gap16.30.922.52.621.31.218.60.7
very large gap1.70.32.41.01.70.41.70.2
total100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151190/137570
NFI3
number of forest plots
landslide/mudflow 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 2004/06
biogeographical region
JuraPlateauNorthern AlpsWestern Central-AlpsEastern Central-AlpsSouthern AlpsSwitzerland
landslide/mudflow SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %±
n/ano gap55.82.463.21.936.62.629.06.116.53.446.16.850.51.2
small gap17.91.913.61.421.92.221.95.620.73.714.84.817.30.9
medium gap10.71.510.51.218.62.123.85.824.73.922.35.714.20.9
large gap14.61.710.61.220.82.223.65.738.14.413.04.616.40.9
very large gap1.00.52.00.62.00.81.81.8.0.03.82.61.70.3
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap56.46.757.911.360.25.126.95.413.55.645.36.244.92.7
small gap14.54.815.88.411.83.437.35.924.37.118.74.920.22.2
medium gap16.45.05.35.19.73.119.44.835.17.921.95.217.62.1
large gap12.74.515.88.415.03.716.44.527.07.314.14.416.12.0
very large gap.0.05.35.13.21.8.0.0.0.0.0.01.20.6
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap52.97.063.36.229.72.224.03.815.53.443.73.333.71.5
small gap23.55.916.74.822.42.020.83.625.94.120.42.721.91.3
medium gap11.84.56.73.220.11.933.64.221.53.813.32.319.11.2
large gap11.84.513.34.424.72.120.83.634.54.421.72.723.31.3
very large gap.0.0.0.03.20.80.80.82.61.50.90.62.00.4
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap55.62.263.11.835.71.625.92.815.72.244.42.744.20.9
small gap18.11.713.91.321.11.425.52.823.42.619.22.119.20.7
medium gap11.41.410.01.118.41.327.52.824.82.616.32.016.20.7
large gap14.11.511.01.222.11.420.22.635.02.918.92.118.70.7
very large gap0.80.41.90.52.70.50.80.61.10.61.20.61.70.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151191/137571
NFI3
number of forest plots
landslide/mudflow SilvaProtect · area of largest gap (aerial photo, 5 classes)
unit of reference: canton
unit: %
unit of evaluation: accessible forest without shrub forest NFI1/NFI2/NFI3/NFI4
grid: grid NFI4 2009-2013
state 2004/06
landslide/mudflow SilvaProtect
n/ainside perimeteroutside perimetertotal
cantonarea of largest gap (aerial photo, 5 classes) %± %± %± %±
AGno gap63.64.433.327.3.0.062.84.4
small gap11.02.933.327.3.0.011.62.9
medium gap9.32.7.0.0.0.09.12.6
large gap13.63.233.327.3.0.014.03.2
very large gap2.51.5.0.0.0.02.51.4
total100.0.100.0..0.0100.0.
AIno gap80.018.4.0.055.616.960.013.0
small gap.0.0100.0.22.214.220.010.6
medium gap.0.0.0.0.0.0.0.0
large gap20.018.4.0.022.214.220.010.6
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
ARno gap53.313.150.020.825.022.148.010.1
small gap33.312.416.715.525.022.128.09.1
medium gap6.76.616.715.550.025.416.07.5
large gap6.76.616.715.5.0.08.05.5
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
BEno gap48.33.150.97.032.23.642.82.3
small gap16.12.311.94.626.23.419.21.8
medium gap16.92.39.84.214.92.815.41.7
large gap18.42.425.56.124.43.321.31.9
very large gap0.40.42.01.92.41.21.30.5
total100.0.100.0.100.0.100.0.
BL/BSno gap64.77.950.020.650.025.261.67.2
small gap10.95.2.0.025.021.810.74.6
medium gap5.43.833.319.425.021.810.74.6
large gap19.06.516.715.3.0.017.15.5
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
FRno gap50.76.275.021.743.87.849.04.8
small gap9.23.625.021.717.15.912.73.2
medium gap13.94.3.0.019.56.215.53.5
large gap20.05.0.0.014.75.517.33.6
very large gap6.23.0.0.04.93.45.52.2
total100.0.100.0.100.0.100.0.
GEno gap100.0..0.0.0.0100.0.
small gap.0.0.0.0.0.0.0.0
medium gap.0.0.0.0.0.0.0.0
large gap.0.0.0.0.0.0.0.0
very large gap.0.0.0.0.0.0.0.0
total100.0..0.0.0.0100.0.
GLno gap53.313.062.517.233.311.246.37.9
small gap6.76.512.511.811.17.59.84.7
medium gap6.76.512.511.811.17.59.84.7
large gap33.312.312.511.838.911.631.77.3
very large gap.0.0.0.05.65.42.42.4
total100.0.100.0.100.0.100.0.
GRno gap15.92.918.55.316.32.616.41.8
small gap21.13.318.55.322.83.021.62.0
medium gap27.43.635.26.522.93.026.22.2
large gap34.43.827.86.136.03.434.32.4
very large gap1.30.9.0.02.01.01.50.6
total100.0.100.0.100.0.100.0.
JUno gap66.86.2.0.052.010.058.75.2
small gap13.94.660.022.020.08.018.34.2
medium gap7.03.440.022.012.06.510.43.3
large gap12.34.4.0.016.07.412.73.6
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
LUno gap47.84.9100.0.28.69.945.04.5
small gap26.14.3.0.019.08.624.73.9
medium gap10.63.0.0.042.910.815.93.3
large gap15.53.6.0.09.56.414.43.1
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
NEno gap50.76.090.09.4100.0.57.65.4
small gap23.85.110.09.5.0.021.14.4
medium gap18.24.6.0.0.0.015.23.9
large gap5.62.7.0.0.0.04.72.3
very large gap1.71.7.0.0.0.01.41.4
total100.0.100.0.100.0.100.0.
NWno gap40.015.8.0.033.319.635.311.8
small gap20.012.9100.0.33.319.629.411.3
medium gap20.012.9.0.0.0.011.88.0
large gap20.012.9.0.033.319.623.510.5
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
OWno gap32.19.425.021.831.810.031.46.6
small gap12.06.625.021.827.39.619.65.6
medium gap24.18.6.0.018.28.319.65.6
large gap24.18.650.025.222.79.025.56.1
very large gap7.75.2.0.0.0.03.82.6
total100.0.100.0.100.0.100.0.
SGno gap47.26.988.27.837.35.947.54.3
small gap22.75.8.0.020.95.019.03.4
medium gap18.85.45.95.719.44.817.53.3
large gap9.44.0.0.017.94.712.42.8
very large gap1.91.95.95.74.52.53.71.6
total100.0.100.0.100.0.100.0.
SHno gap73.57.550.035.8.0.072.27.4
small gap5.94.150.035.8.0.08.34.7
medium gap8.84.9.0.0.0.08.34.7
large gap11.85.6.0.0.0.011.15.3
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0..0.0100.0.
SOno gap67.55.466.727.466.727.367.55.2
small gap7.83.1.0.0.0.07.22.9
medium gap6.52.833.327.433.327.48.43.1
large gap15.64.2.0.0.0.014.53.9
very large gap2.61.8.0.0.0.02.41.7
total100.0.100.0.100.0.100.0.
SZno gap41.98.9100.0.40.08.345.15.9
small gap19.47.1.0.011.45.414.14.1
medium gap9.75.3.0.022.97.115.54.3
large gap25.87.9.0.020.06.821.14.9
very large gap3.23.2.0.05.73.94.22.4
total100.0.100.0.100.0.100.0.
TGno gap68.56.050.035.675.015.368.75.6
small gap21.65.350.035.612.511.821.34.9
medium gap6.63.2.0.0.0.05.72.8
large gap1.71.7.0.012.511.82.82.0
very large gap1.71.7.0.0.0.01.41.4
total100.0.100.0.100.0.100.0.
TIno gap58.87.952.97.049.43.851.43.1
small gap15.45.821.65.820.83.020.22.5
medium gap12.95.417.65.39.62.211.62.0
large gap10.34.97.83.819.13.015.72.2
very large gap2.72.6.0.01.10.81.10.7
total100.0.100.0.100.0.100.0.
URno gap33.612.350.015.933.811.337.57.4
small gap26.211.320.012.716.58.820.76.2
medium gap14.09.210.09.522.19.816.45.7
large gap26.211.320.012.727.610.625.36.6
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
VDno gap53.23.666.712.230.77.450.43.2
small gap22.93.06.76.528.17.222.72.7
medium gap8.32.013.38.823.26.811.02.0
large gap13.52.56.76.518.06.213.82.2
very large gap2.11.06.76.5.0.02.00.9
total100.0.100.0.100.0.100.0.
VSno gap27.85.728.45.224.73.726.42.7
small gap23.05.433.85.521.73.525.32.6
medium gap24.75.520.34.731.94.027.12.7
large gap22.95.417.64.421.03.520.52.4
very large gap1.61.6.0.00.70.70.70.5
total100.0.100.0.100.0.100.0.
ZGno gap75.022.3.0.037.517.746.214.3
small gap25.022.4.0.037.517.730.813.2
medium gap.0.0.0.0.0.0.0.0
large gap.0.0.0.012.512.17.77.7
very large gap.0.0100.0.12.512.115.410.4
total100.0.100.0.100.0.100.0.
ZHno gap59.74.2100.0.66.727.360.14.1
small gap12.22.8.0.0.0.011.92.7
medium gap17.33.2.0.0.0.016.83.1
large gap8.62.4.0.033.327.39.12.4
very large gap2.21.2.0.0.0.02.11.2
total100.0.100.0.100.0.100.0.
Switzerlandno gap50.81.244.82.733.81.544.40.9
small gap17.10.920.22.221.91.319.00.7
medium gap14.00.817.72.119.11.216.10.7
large gap16.40.916.02.023.31.318.70.7
very large gap1.70.31.30.62.00.41.80.2
total100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151192/137572
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 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 gap38.62.335.01.924.82.111.53.611.52.529.64.830.31.1
small gap36.72.338.41.928.62.224.04.826.43.520.94.333.31.1
medium gap11.41.513.71.418.81.927.85.023.33.419.94.216.00.9
large gap12.61.611.11.227.52.235.45.437.43.929.64.819.40.9
very large gap0.70.41.70.50.20.21.31.31.30.9.0.01.00.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap22.213.9.0.045.07.912.56.725.015.333.38.231.14.3
small gap22.413.950.035.425.06.824.98.825.015.327.27.825.94.1
medium gap33.315.750.035.410.04.724.98.825.015.315.16.218.03.6
large gap22.213.9.0.017.56.037.79.925.015.324.37.524.14.0
very large gap.0.0.0.02.52.5.0.0.0.0.0.00.90.9
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap42.45.035.15.423.11.915.42.78.62.229.22.623.81.2
small gap36.44.850.75.732.22.131.33.424.53.436.62.833.51.3
medium gap10.13.05.22.519.81.720.93.026.43.513.82.017.81.0
large gap11.13.29.13.323.31.930.23.437.43.819.82.323.41.2
very large gap.0.0.0.01.50.52.21.13.11.40.70.51.40.3
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap39.02.134.91.824.81.414.12.110.41.729.62.227.70.8
small gap36.42.139.81.830.41.528.72.725.52.432.52.333.10.8
medium gap11.51.412.91.219.01.323.12.524.92.415.21.816.80.7
large gap12.51.410.91.224.91.432.32.837.12.722.22.021.20.7
very large gap0.60.31.50.51.00.31.80.82.10.80.50.31.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151214/137594
NFI4b
number of forest plots
rockfall SilvaProtect · area of largest gap (aerial photo, 5 classes)
unit of reference: canton
unit: %
unit of evaluation: accessible forest without shrub forest NFI3/NFI4
grid: grid NFI4 2009-2013
state 2009/13
rockfall SilvaProtect
n/ainside perimeteroutside perimetertotal
cantonarea of largest gap (aerial photo, 5 classes) %± %± %± %±
AGno gap42.94.5.0.0.0.041.84.5
small gap35.34.4.0.066.727.336.14.3
medium gap10.12.8.0.033.327.310.72.8
large gap10.12.8.0.0.0.09.82.7
very large gap1.71.2.0.0.0.01.61.2
total100.0..0.0100.0.100.0.
AIno gap83.915.2.0.010.09.838.312.5
small gap.0.0.0.060.015.737.012.3
medium gap.0.0.0.010.09.86.26.1
large gap16.115.2.0.020.013.018.59.9
very large gap.0.0.0.0.0.0.0.0
total100.0..0.0100.0.100.0.
ARno gap33.312.4.0.040.015.836.09.8
small gap60.012.8.0.020.012.944.010.1
medium gap.0.0.0.030.014.812.06.6
large gap6.76.6.0.010.09.78.05.5
very large gap.0.0.0.0.0.0.0.0
total100.0..0.0100.0.100.0.
BEno gap28.02.741.011.922.52.926.12.0
small gap37.12.918.09.436.83.336.32.2
medium gap18.62.423.410.314.82.517.21.7
large gap15.62.217.69.224.03.019.21.8
very large gap0.70.5.0.01.90.91.20.5
total100.0.100.0.100.0.100.0.
BL/BSno gap49.88.0.0.060.015.650.87.1
small gap35.27.6.0.010.09.629.56.4
medium gap2.52.5100.0.30.014.69.84.2
large gap12.65.3.0.0.0.09.84.2
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
FRno gap29.75.6.0.021.26.026.24.1
small gap25.45.3.0.027.76.526.44.1
medium gap23.95.2.0.029.86.726.44.1
large gap19.44.9.0.021.36.020.23.8
very large gap1.51.5.0.0.0.00.90.9
total100.0..0.0100.0.100.0.
GEno gap55.720.1.0.0.0.055.720.1
small gap.0.0.0.0.0.0.0.0
medium gap14.814.6.0.0.0.014.814.6
large gap29.518.7.0.0.0.029.518.7
very large gap.0.0.0.0.0.0.0.0
total100.0..0.0.0.0100.0.
GLno gap17.69.342.918.928.710.026.76.7
small gap17.69.328.617.233.110.326.56.6
medium gap35.311.714.313.39.66.520.06.0
large gap29.411.214.313.319.18.722.36.3
very large gap.0.0.0.09.66.54.53.1
total100.0.100.0.100.0.100.0.
GRno gap13.82.421.09.312.72.113.51.6
small gap25.43.036.811.127.62.827.02.0
medium gap23.02.921.09.323.42.623.11.9
large gap36.93.421.29.433.72.934.52.2
very large gap1.00.7.0.02.71.01.90.6
total100.0.100.0.100.0.100.0.
JUno gap38.56.533.327.425.98.534.45.1
small gap36.96.433.327.459.39.443.75.3
medium gap8.83.8.0.07.45.18.12.9
large gap14.14.633.327.47.45.112.73.6
very large gap1.81.8.0.0.0.01.21.2
total100.0.100.0.100.0.100.0.
LUno gap25.04.3.0.022.79.024.63.8
small gap37.14.7.0.036.410.337.04.3
medium gap19.93.9.0.027.39.521.23.6
large gap15.23.5.0.013.67.314.93.2
very large gap2.81.6.0.0.0.02.41.3
total100.0..0.0100.0.100.0.
NEno gap32.85.5.0.035.712.933.25.1
small gap46.65.9.0.050.013.447.25.4
medium gap15.24.2.0.07.16.913.93.7
large gap5.42.6.0.07.16.95.72.5
very large gap.0.0.0.0.0.0.0.0
total100.0..0.0100.0.100.0.
NWno gap25.012.8100.0.42.919.135.010.9
small gap41.714.5.0.057.119.045.011.3
medium gap8.38.2.0.0.0.05.05.0
large gap25.012.8.0.0.0.015.08.2
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
OWno gap31.89.4.0.020.88.425.46.1
small gap16.17.450.035.712.56.815.75.1
medium gap16.17.4.0.029.29.421.65.8
large gap36.19.750.035.737.510.037.36.8
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
SGno gap31.15.925.021.732.95.132.03.8
small gap24.65.550.025.135.35.231.33.8
medium gap19.75.125.021.711.83.515.33.0
large gap22.95.4.0.020.04.320.73.3
very large gap1.61.6.0.0.0.00.70.7
total100.0.100.0.100.0.100.0.
SHno gap47.18.6.0.050.035.847.28.4
small gap38.28.4.0.050.035.838.98.2
medium gap5.94.1.0.0.0.05.63.9
large gap8.84.9.0.0.0.08.34.7
very large gap.0.0.0.0.0.0.0.0
total100.0..0.0100.0.100.0.
SOno gap50.05.750.035.5100.0.52.45.5
small gap32.15.3.0.0.0.029.85.0
medium gap10.33.550.035.5.0.010.73.4
large gap7.73.0.0.0.0.07.12.8
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
SZno gap27.87.533.327.441.17.934.75.4
small gap25.07.233.327.420.56.523.14.8
medium gap8.34.6.0.015.45.811.53.6
large gap38.98.2.0.020.56.528.25.1
very large gap.0.033.327.42.62.52.61.8
total100.0.100.0.100.0.100.0.
TGno gap40.86.3.0.060.015.643.55.9
small gap34.76.2.0.020.012.732.75.6
medium gap6.53.2.0.010.09.57.03.0
large gap16.34.7.0.010.09.515.44.3
very large gap1.61.6.0.0.0.01.41.4
total100.0..0.0100.0.100.0.
TIno gap32.45.740.910.532.23.032.82.6
small gap20.74.918.28.236.93.132.32.6
medium gap17.84.713.67.313.02.214.01.9
large gap29.25.527.39.517.52.520.62.2
very large gap.0.0.0.00.40.40.30.3
total100.0.100.0.100.0.100.0.
URno gap12.36.733.315.829.010.022.35.7
small gap28.79.233.315.823.79.327.56.1
medium gap12.97.0.0.033.110.318.65.3
large gap46.210.233.315.814.27.631.76.4
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
VDno gap30.93.2100.0.21.95.629.52.8
small gap36.73.4.0.047.36.738.73.0
medium gap13.82.4.0.014.64.813.82.1
large gap17.12.6.0.016.35.016.82.3
very large gap1.50.8.0.0.0.01.20.7
total100.0.100.0.100.0.100.0.
VSno gap12.53.512.56.716.62.615.12.0
small gap25.84.624.98.831.23.229.22.6
medium gap25.84.624.98.821.02.822.62.3
large gap34.85.137.79.929.33.231.52.6
very large gap1.11.1.0.02.01.01.60.7
total100.0.100.0.100.0.100.0.
ZGno gap40.022.7.0.022.214.328.612.5
small gap60.022.6.0.044.417.150.013.8
medium gap.0.0.0.011.110.87.17.1
large gap.0.0.0.022.214.314.39.7
very large gap.0.0.0.0.0.0.0.0
total100.0..0.0100.0.100.0.
ZHno gap31.93.9.0.0.0.031.13.9
small gap42.54.2.0.050.025.142.74.1
medium gap15.63.1.0.0.0.015.23.0
large gap9.22.4.0.050.025.110.32.5
very large gap0.70.7.0.0.0.00.70.7
total100.0..0.0100.0.100.0.
Switzerlandno gap30.61.131.24.323.91.227.90.8
small gap33.21.125.84.133.51.333.10.8
medium gap15.90.918.13.617.81.016.80.6
large gap19.30.924.04.023.41.221.10.7
very large gap1.00.20.90.91.40.31.20.2
total100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151215/137595
NFI4b
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 without shrub forest NFI3/NFI4
grid: grid NFI4 2009-2013
state 2009/13
production region
JuraPlateauPre-AlpsAlpsSouthern AlpsSwitzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %±
n/ano gap41.12.334.31.925.82.615.31.829.84.930.31.1
small gap35.72.338.92.031.12.826.42.220.84.433.31.1
medium gap10.61.513.61.419.42.423.02.118.54.216.00.9
large gap11.91.511.31.323.32.534.62.430.95.019.30.9
very large gap0.70.41.80.50.40.40.70.4.0.01.00.2
total100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap22.213.9.0.025.015.333.35.831.28.231.04.3
small gap22.113.8100.0.25.015.324.25.328.17.925.84.1
medium gap33.415.7.0.037.517.115.14.415.66.418.23.6
large gap22.213.9.0.012.511.725.85.425.17.724.24.0
very large gap.0.0.0.0.0.01.51.5.0.00.80.8
total100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap40.65.034.06.725.32.516.61.529.32.723.91.2
small gap38.55.052.07.134.42.729.11.936.52.833.51.3
medium gap10.43.16.03.419.52.321.31.713.72.017.81.0
large gap10.43.18.03.820.12.330.41.919.82.323.31.1
very large gap.0.0.0.00.60.52.50.60.70.51.40.3
total100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap40.72.134.21.925.51.817.11.229.62.327.70.8
small gap36.02.040.01.932.71.927.81.432.62.333.20.8
medium gap10.91.313.01.319.71.621.61.314.81.816.80.7
large gap11.81.411.01.221.51.731.71.422.52.121.10.7
very large gap0.50.31.70.50.50.31.80.40.50.31.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151216/137596
NFI4b
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: grid NFI4 2009-2013
state 2009/13
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern AlpsSwitzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %±
n/ano gap37.21.521.72.627.93.612.53.513.12.529.84.930.31.1
small gap37.61.532.02.926.73.525.84.625.83.220.84.433.31.1
medium gap12.31.022.12.616.13.025.84.623.23.118.54.216.00.9
large gap11.61.024.12.728.73.634.85.136.83.630.95.019.30.9
very large gap1.30.4.0.00.60.61.11.11.10.8.0.01.00.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap20.012.655.611.734.89.912.56.733.315.731.28.231.24.3
small gap30.114.511.17.434.89.924.98.822.213.928.17.925.84.1
medium gap30.014.516.78.88.75.924.98.822.213.915.66.418.13.6
large gap20.012.616.78.817.47.937.79.922.213.925.17.724.14.0
very large gap.0.0.0.04.34.3.0.0.0.0.0.00.80.8
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap38.44.019.02.332.03.416.62.611.62.229.32.723.81.2
small gap43.24.134.72.830.73.331.23.225.63.036.52.833.51.3
medium gap8.92.420.72.415.42.621.02.825.13.013.72.017.81.0
large gap9.62.424.22.520.32.929.33.234.83.319.82.323.41.2
very large gap.0.01.40.71.50.92.01.02.91.20.70.51.40.3
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap37.21.421.41.730.42.415.12.012.81.729.62.327.70.8
small gap38.21.432.72.029.22.429.22.625.62.232.62.333.20.8
medium gap12.10.921.21.715.31.922.62.324.22.114.81.816.80.7
large gap11.40.923.91.823.72.231.52.635.42.422.52.121.20.7
very large gap1.20.30.70.41.30.61.60.72.00.70.50.31.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151217/137597
NFI4b
number of forest plots
rockfall SilvaProtect · area of largest gap (aerial photo, 5 classes)
unit of reference: economic region
unit: %
unit of evaluation: accessible forest without shrub forest NFI3/NFI4
grid: grid NFI4 2009-2013
state 2009/13
rockfall SilvaProtect
n/ainside perimeteroutside perimetertotal
economic regionarea of largest gap (aerial photo, 5 classes) %± %± %± %±
Western Jurano gap38.62.724.915.338.65.338.32.4
small gap36.22.625.415.539.75.436.72.3
medium gap12.21.824.915.39.63.211.91.6
large gap12.51.824.915.312.03.612.61.6
very large gap0.60.4.0.0.0.00.50.3
total100.0.100.0.100.0.100.0.
Eastern Jurano gap49.04.8.0.053.813.949.14.5
small gap34.34.6.0.030.812.833.64.3
medium gap5.62.2100.0.15.410.07.42.4
large gap10.22.9.0.0.0.09.02.6
very large gap0.90.9.0.0.0.00.80.8
total100.0.100.0.100.0.100.0.
Western Plateauno gap34.84.6.0.025.312.733.84.4
small gap34.94.6.0.066.313.738.14.5
medium gap12.33.2.0.0.0.011.12.9
large gap15.23.5.0.08.48.114.53.3
very large gap2.81.6.0.0.0.02.61.5
total100.0..0.0100.0.100.0.
Central Plateauno gap32.33.3.0.033.310.332.23.2
small gap39.23.5100.0.52.410.940.73.3
medium gap17.02.7.0.04.84.715.82.5
large gap9.02.0.0.09.56.49.01.9
very large gap2.51.1.0.0.0.02.31.0
total100.0.100.0.100.0.100.0.
Eastern Plateauno gap35.52.8.0.041.211.935.82.7
small gap40.22.9.0.041.211.940.32.8
medium gap11.81.9.0.011.87.811.81.8
large gap11.51.9.0.05.95.711.21.8
very large gap1.00.6.0.0.0.01.00.6
total100.0..0.0100.0.100.0.
Western Pre-Alpsno gap28.46.4.0.019.74.723.03.8
small gap22.56.0.0.026.85.324.93.9
medium gap26.66.3100.0.32.55.630.74.2
large gap22.56.0.0.021.04.821.53.7
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
Central Pre-Alpsno gap19.03.325.021.719.03.519.12.4
small gap33.84.025.021.740.54.436.82.9
medium gap21.13.425.021.716.73.319.12.4
large gap26.13.725.021.723.03.824.62.6
very large gap.0.0.0.00.80.80.40.4
total100.0.100.0.100.0.100.0.
Eastern Pre-Alpsno gap34.85.033.327.336.04.635.43.3
small gap31.54.833.327.332.44.532.03.3
medium gap13.03.533.327.314.43.314.12.4
large gap19.64.1.0.016.23.517.52.7
very large gap1.11.1.0.00.90.91.00.7
total100.0.100.0.100.0.100.0.
Northwestern Alpsno gap22.65.369.212.818.64.023.93.3
small gap35.46.17.77.433.04.832.03.6
medium gap21.05.27.77.417.53.918.02.9
large gap21.05.215.410.027.84.624.43.3
very large gap.0.0.0.03.11.81.71.0
total100.0.100.0.100.0.100.0.
Central Alpsno gap18.46.336.414.634.78.927.05.1
small gap20.86.627.313.517.27.020.44.6
medium gap10.65.0.0.030.98.616.74.2
large gap50.18.127.313.517.27.034.75.4
very large gap.0.09.18.7.0.01.31.3
total100.0.100.0.100.0.100.0.
Northeastern Alpsno gap18.57.533.315.822.75.822.54.4
small gap18.57.544.416.634.06.530.34.9
medium gap33.39.111.110.59.44.016.84.0
large gap29.68.811.110.530.26.328.14.8
very large gap.0.0.0.03.82.62.21.6
total100.0.100.0.100.0.100.0.
Southwestern Alpsno gap12.53.512.56.716.62.615.12.0
small gap25.84.624.98.831.23.229.22.6
medium gap25.84.624.98.821.02.822.62.3
large gap34.85.137.79.929.33.231.52.6
very large gap1.11.1.0.02.01.01.60.7
total100.0.100.0.100.0.100.0.
Southeastern Alpsno gap13.12.533.315.711.62.212.81.7
small gap25.83.222.213.925.63.025.62.2
medium gap23.23.122.213.925.13.024.22.1
large gap36.83.622.213.934.83.335.42.4
very large gap1.10.8.0.02.91.22.00.7
total100.0.100.0.100.0.100.0.
Southern Alpsno gap29.84.931.28.229.32.729.62.3
small gap20.84.428.17.936.52.832.62.3
medium gap18.54.215.66.413.72.014.81.8
large gap30.95.025.17.719.82.322.52.1
very large gap.0.0.0.00.70.50.50.3
total100.0.100.0.100.0.100.0.
Switzerlandno gap30.41.131.14.323.81.227.80.8
small gap33.31.125.84.133.51.333.10.8
medium gap15.90.918.23.617.91.016.80.6
large gap19.40.924.14.023.41.221.20.7
very large gap1.00.20.80.81.40.31.20.2
total100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151218/137598
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 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 gap38.62.334.91.924.82.111.53.611.52.529.64.830.31.1
small gap36.72.338.61.928.62.224.04.826.43.520.94.333.31.1
medium gap11.41.513.81.418.81.927.85.023.33.419.94.216.10.9
large gap12.61.611.11.227.52.235.45.437.43.929.64.819.40.9
very large gap0.70.41.70.50.20.21.31.31.30.9.0.01.00.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap53.813.8.0.031.84.47.33.22.42.412.35.119.52.4
small gap30.912.8.0.026.44.233.85.719.06.136.57.528.82.7
medium gap7.77.4.0.020.03.823.55.131.07.124.36.722.62.5
large gap7.77.4.0.018.23.733.95.842.97.626.96.926.62.7
very large gap.0.0.0.03.61.81.51.54.83.3.0.02.61.0
total100.0..0.0100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap39.05.035.55.523.02.018.93.311.62.832.02.725.61.3
small gap35.84.950.05.733.02.229.03.926.33.935.62.833.81.4
medium gap12.63.45.32.618.91.820.33.424.83.812.41.916.71.1
large gap12.63.49.23.324.12.029.73.934.94.219.32.322.81.2
very large gap.0.0.0.01.10.52.21.22.31.30.70.51.10.3
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap39.02.134.91.824.81.414.12.110.41.729.62.227.70.8
small gap36.42.139.81.830.41.528.72.725.52.432.52.333.10.8
medium gap11.51.412.91.219.01.323.12.524.92.415.21.816.80.7
large gap12.51.410.91.224.91.432.32.837.12.722.22.021.20.7
very large gap0.60.31.50.51.00.31.80.82.10.80.50.31.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151219/137599
NFI4b
number of forest plots
avalanches SilvaProtect · area of largest gap (aerial photo, 5 classes)
unit of reference: canton
unit: %
unit of evaluation: accessible forest without shrub forest NFI3/NFI4
grid: grid NFI4 2009-2013
state 2009/13
avalanches SilvaProtect
n/ainside perimeteroutside perimetertotal
cantonarea of largest gap (aerial photo, 5 classes) %± %± %± %±
AGno gap41.84.5.0.0.0.041.84.5
small gap36.14.3.0.0.0.036.14.3
medium gap10.72.8.0.0.0.010.72.8
large gap9.82.7.0.0.0.09.82.7
very large gap1.61.2.0.0.0.01.61.2
total100.0..0.0.0.0100.0.
AIno gap83.915.233.328.0.0.038.312.5
small gap.0.033.328.071.417.337.012.3
medium gap.0.0.0.014.313.66.26.1
large gap16.115.233.328.014.313.618.59.9
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
ARno gap33.312.4.0.044.416.836.09.8
small gap60.012.8.0.022.214.144.010.1
medium gap.0.0100.0.22.214.112.06.6
large gap6.76.6.0.011.110.78.05.5
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
BEno gap28.02.726.16.823.43.126.12.0
small gap37.12.923.96.638.03.636.32.2
medium gap18.62.426.16.813.02.517.21.7
large gap15.62.216.85.825.03.219.21.8
very large gap0.70.57.14.00.50.51.20.5
total100.0.100.0.100.0.100.0.
BL/BSno gap49.88.0.0.054.515.150.87.1
small gap35.27.6.0.09.18.729.56.4
medium gap2.52.5.0.036.414.69.84.2
large gap12.65.3.0.0.0.09.84.2
very large gap.0.0.0.0.0.0.0.0
total100.0..0.0100.0.100.0.
FRno gap29.75.633.327.320.46.126.24.1
small gap25.45.3.0.029.66.926.44.1
medium gap23.95.266.727.327.36.726.44.1
large gap19.44.9.0.022.86.320.23.8
very large gap1.51.5.0.0.0.00.90.9
total100.0.100.0.100.0.100.0.
GEno gap55.720.1.0.0.0.055.720.1
small gap.0.0.0.0.0.0.0.0
medium gap14.814.6.0.0.0.014.814.6
large gap29.518.7.0.0.0.029.518.7
very large gap.0.0.0.0.0.0.0.0
total100.0..0.0.0.0100.0.
GLno gap17.69.327.513.635.311.726.76.7
small gap17.69.326.713.335.311.726.56.6
medium gap35.311.718.311.85.95.820.06.0
large gap29.411.227.513.611.87.922.36.3
very large gap.0.0.0.011.87.94.53.1
total100.0.100.0.100.0.100.0.
GRno gap13.82.49.73.814.22.413.51.6
small gap25.43.019.35.030.73.127.02.0
medium gap23.02.927.45.722.02.823.11.9
large gap36.93.440.46.230.73.134.52.2
very large gap1.00.73.22.22.31.01.90.6
total100.0.100.0.100.0.100.0.
JUno gap38.56.5100.0.21.47.834.45.1
small gap36.96.4.0.060.79.243.75.3
medium gap8.83.8.0.07.14.98.12.9
large gap14.14.6.0.010.75.912.73.6
very large gap1.81.8.0.0.0.01.21.2
total100.0.100.0.100.0.100.0.
LUno gap25.04.3100.0.15.08.024.63.8
small gap37.14.7.0.040.011.037.04.3
medium gap19.93.9.0.030.010.321.23.6
large gap15.23.5.0.015.08.014.93.2
very large gap2.81.6.0.0.0.02.41.3
total100.0.100.0.100.0.100.0.
NEno gap32.85.533.327.436.414.633.25.1
small gap46.65.966.727.345.515.147.25.4
medium gap15.24.2.0.09.18.713.93.7
large gap5.42.6.0.09.18.75.72.5
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
NWno gap25.012.833.327.860.022.335.010.9
small gap41.714.566.727.740.022.445.011.3
medium gap8.38.2.0.0.0.05.05.0
large gap25.012.8.0.0.0.015.08.2
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
OWno gap31.89.440.022.114.37.725.46.1
small gap16.17.420.018.114.37.715.75.1
medium gap16.17.420.018.128.69.921.65.8
large gap36.19.720.018.142.910.937.36.8
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
SGno gap31.15.920.012.734.15.332.03.8
small gap24.65.550.015.834.25.431.33.8
medium gap19.75.1.0.013.93.915.33.0
large gap22.95.430.014.517.74.320.73.3
very large gap1.61.6.0.0.0.00.70.7
total100.0.100.0.100.0.100.0.
SHno gap47.18.6.0.050.035.847.28.4
small gap38.28.4.0.050.035.838.98.2
medium gap5.94.1.0.0.0.05.63.9
large gap8.84.9.0.0.0.08.34.7
very large gap.0.0.0.0.0.0.0.0
total100.0..0.0100.0.100.0.
SOno gap50.05.7.0.083.315.352.45.5
small gap32.15.3.0.0.0.029.85.0
medium gap10.33.5.0.016.715.310.73.4
large gap7.73.0.0.0.0.07.12.8
very large gap.0.0.0.0.0.0.0.0
total100.0..0.0100.0.100.0.
SZno gap27.87.533.319.341.78.334.75.4
small gap25.07.2.0.025.07.223.14.8
medium gap8.34.633.319.311.15.311.53.6
large gap38.98.216.715.319.46.628.25.1
very large gap.0.016.715.32.82.82.61.8
total100.0.100.0.100.0.100.0.
TGno gap40.86.3.0.060.015.643.55.9
small gap34.76.2.0.020.012.732.75.6
medium gap6.53.2.0.010.09.57.03.0
large gap16.34.7.0.010.09.515.44.3
very large gap1.61.6.0.0.0.01.41.4
total100.0..0.0100.0.100.0.
TIno gap32.45.714.96.935.03.132.82.6
small gap20.74.940.79.534.73.132.32.6
medium gap17.84.722.28.012.02.114.01.9
large gap29.25.522.28.017.92.520.62.2
very large gap.0.0.0.00.40.40.30.3
total100.0.100.0.100.0.100.0.
URno gap12.36.730.014.630.510.422.35.7
small gap28.79.250.015.914.98.027.56.1
medium gap12.97.010.09.529.810.318.65.3
large gap46.210.210.09.624.89.731.76.4
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
VDno gap30.93.245.515.019.65.929.52.8
small gap36.73.427.313.450.07.438.73.0
medium gap13.82.49.18.715.35.313.82.1
large gap17.12.618.211.615.15.316.82.3
very large gap1.50.8.0.0.0.01.20.7
total100.0.100.0.100.0.100.0.
VSno gap12.53.59.63.419.33.215.12.0
small gap25.84.632.85.529.53.729.22.6
medium gap25.84.624.65.019.93.222.62.3
large gap34.85.131.65.429.53.731.52.6
very large gap1.11.11.41.41.91.11.60.7
total100.0.100.0.100.0.100.0.
ZGno gap40.022.7.0.022.214.328.612.5
small gap60.022.6.0.044.417.150.013.8
medium gap.0.0.0.011.110.87.17.1
large gap.0.0.0.022.214.314.39.7
very large gap.0.0.0.0.0.0.0.0
total100.0..0.0100.0.100.0.
ZHno gap31.93.9.0.0.0.031.13.9
small gap42.54.2.0.050.025.142.74.1
medium gap15.63.1.0.0.0.015.23.0
large gap9.22.4.0.050.025.110.32.5
very large gap0.70.7.0.0.0.00.70.7
total100.0..0.0100.0.100.0.
Switzerlandno gap30.51.119.52.425.71.327.90.8
small gap33.31.128.82.733.81.433.10.8
medium gap16.00.922.52.516.71.116.80.6
large gap19.30.926.72.722.71.221.10.7
very large gap1.00.22.50.91.10.31.20.2
total100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151220/137600
NFI4b
number of forest plots
avalanches SilvaProtect · area of largest gap (aerial photo, 5 classes)
unit of reference: production region
unit: %
unit of evaluation: accessible forest without shrub forest NFI3/NFI4
grid: grid NFI4 2009-2013
state 2009/13
production region
JuraPlateauPre-AlpsAlpsSouthern AlpsSwitzerland
avalanches SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %±
n/ano gap40.92.334.21.925.82.615.31.829.84.930.31.1
small gap36.02.338.92.031.12.826.42.220.84.433.41.1
medium gap10.51.513.81.419.42.423.02.118.54.216.10.9
large gap11.91.511.31.323.32.534.62.430.95.019.30.9
very large gap0.70.41.80.50.40.40.70.4.0.01.00.2
total100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap53.913.8.0.041.78.214.02.512.95.419.52.4
small gap30.712.8.0.013.95.830.13.435.87.728.82.7
medium gap7.77.4.0.025.07.223.13.123.06.722.62.5
large gap7.77.4.0.019.46.629.03.328.27.226.62.7
very large gap.0.0.0.0.0.03.81.4.0.02.50.9
total100.0..0.0100.0.100.0.100.0.100.0.
outside perimeterno gap37.85.134.06.723.22.520.01.831.82.825.71.3
small gap36.75.154.07.136.82.928.02.135.72.833.81.4
medium gap13.33.64.02.819.32.419.71.812.62.016.71.1
large gap12.23.58.03.820.02.430.42.119.22.322.71.2
very large gap.0.0.0.00.70.51.90.60.70.51.10.3
total100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap40.72.134.21.925.51.817.11.229.62.327.70.8
small gap36.02.040.01.932.71.927.81.432.62.333.20.8
medium gap10.91.313.01.319.71.621.61.314.81.816.80.7
large gap11.81.411.01.221.51.731.71.422.52.121.10.7
very large gap0.50.31.70.50.50.31.80.40.50.31.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151221/137601
NFI4b
number of forest plots
avalanches 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: grid NFI4 2009-2013
state 2009/13
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern AlpsSwitzerland
avalanches SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %±
n/ano gap37.11.521.72.627.93.612.53.513.12.529.84.930.21.1
small gap37.71.532.02.926.73.525.84.625.83.220.84.433.41.1
medium gap12.41.022.12.616.13.025.84.623.23.118.54.216.10.9
large gap11.51.024.12.728.73.634.85.136.83.630.95.019.30.9
very large gap1.30.4.0.00.60.61.11.11.10.8.0.01.00.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap53.813.831.06.126.86.99.63.410.04.212.95.419.52.4
small gap30.812.824.15.634.27.432.85.518.05.435.87.728.82.7
medium gap7.77.424.15.614.65.524.65.028.06.423.06.722.62.5
large gap7.77.415.54.821.96.531.65.440.06.928.27.226.62.7
very large gap.0.05.22.92.42.41.41.44.02.8.0.02.61.0
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap36.44.118.92.533.63.619.33.213.32.631.82.825.61.3
small gap42.94.235.43.030.43.529.53.727.73.535.72.833.81.4
medium gap10.02.519.72.514.82.719.93.224.13.312.62.016.71.1
large gap10.72.625.62.719.53.029.53.732.53.619.22.322.81.2
very large gap.0.00.40.41.71.01.91.12.41.20.70.51.10.3
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap37.21.421.41.730.42.415.12.012.81.729.62.327.70.8
small gap38.21.432.72.029.22.429.22.625.62.232.62.333.20.8
medium gap12.10.921.21.715.31.922.62.324.22.114.81.816.80.7
large gap11.40.923.91.823.72.231.52.635.42.422.52.121.20.7
very large gap1.20.30.70.41.30.61.60.72.00.70.50.31.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151222/137602
NFI4b
number of forest plots
avalanches SilvaProtect · area of largest gap (aerial photo, 5 classes)
unit of reference: economic region
unit: %
unit of evaluation: accessible forest without shrub forest NFI3/NFI4
grid: grid NFI4 2009-2013
state 2009/13
avalanches SilvaProtect
n/ainside perimeteroutside perimetertotal
economic regionarea of largest gap (aerial photo, 5 classes) %± %± %± %±
Western Jurano gap38.62.753.713.834.65.438.32.4
small gap36.22.631.012.939.75.536.72.3
medium gap12.21.87.77.411.53.611.91.6
large gap12.51.87.77.414.13.912.61.6
very large gap0.60.4.0.0.0.00.50.3
total100.0.100.0.100.0.100.0.
Eastern Jurano gap48.14.8.0.058.314.349.14.5
small gap35.54.6.0.016.710.833.64.3
medium gap5.52.2.0.025.012.57.42.4
large gap10.02.9.0.0.0.09.02.6
very large gap0.90.9.0.0.0.00.80.8
total100.0..0.0100.0.100.0.
Western Plateauno gap34.84.6.0.025.312.733.84.4
small gap34.94.6.0.066.313.738.14.5
medium gap12.33.2.0.0.0.011.12.9
large gap15.23.5.0.08.48.114.53.3
very large gap2.81.6.0.0.0.02.61.5
total100.0..0.0100.0.100.0.
Central Plateauno gap32.33.3.0.031.89.932.23.2
small gap39.23.5.0.054.510.640.73.3
medium gap17.02.7.0.04.54.415.82.5
large gap9.02.0.0.09.16.19.01.9
very large gap2.51.1.0.0.0.02.31.0
total100.0..0.0100.0.100.0.
Eastern Plateauno gap35.42.8.0.043.712.435.82.7
small gap40.12.8.0.043.712.440.32.8
medium gap12.11.9.0.06.36.111.81.8
large gap11.41.9.0.06.36.111.21.8
very large gap1.00.6.0.0.0.01.00.6
total100.0..0.0100.0.100.0.
Western Pre-Alpsno gap28.46.455.916.614.24.423.03.8
small gap22.56.0.0.030.25.824.93.9
medium gap26.66.333.515.833.46.030.74.2
large gap22.56.010.610.122.25.321.53.7
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
Central Pre-Alpsno gap19.03.336.811.116.23.519.12.4
small gap33.84.015.88.444.14.736.82.9
medium gap21.13.426.310.115.33.419.12.4
large gap26.13.721.19.423.44.024.62.6
very large gap.0.0.0.00.90.90.40.4
total100.0.100.0.100.0.100.0.
Eastern Pre-Alpsno gap34.85.037.517.135.84.735.43.3
small gap31.54.825.015.333.04.632.03.3
medium gap13.03.512.511.715.13.514.12.4
large gap19.64.125.015.315.13.517.52.7
very large gap1.11.1.0.00.90.91.00.7
total100.0.100.0.100.0.100.0.
Northwestern Alpsno gap22.65.320.07.326.34.923.93.3
small gap35.46.136.78.827.55.032.03.6
medium gap21.05.220.07.315.04.018.02.9
large gap21.05.213.36.231.35.224.43.3
very large gap.0.010.05.5.0.01.71.0
total100.0.100.0.100.0.100.0.
Central Alpsno gap18.46.326.711.540.29.927.05.1
small gap20.86.633.312.212.06.520.44.6
medium gap10.65.020.010.423.98.616.74.2
large gap50.18.113.38.823.98.634.75.4
very large gap.0.06.76.5.0.01.31.3
total100.0.100.0.100.0.100.0.
Northeastern Alpsno gap18.57.522.29.825.06.622.54.4
small gap18.57.538.911.534.17.230.34.9
medium gap33.39.111.17.49.14.316.84.0
large gap29.68.827.810.627.26.728.14.8
very large gap.0.0.0.04.53.22.21.6
total100.0.100.0.100.0.100.0.
Southwestern Alpsno gap12.53.59.63.419.33.215.12.0
small gap25.84.632.85.529.53.729.22.6
medium gap25.84.624.65.019.93.222.62.3
large gap34.85.131.65.429.53.731.52.6
very large gap1.11.11.41.41.91.11.60.7
total100.0.100.0.100.0.100.0.
Southeastern Alpsno gap13.12.510.04.213.32.612.81.7
small gap25.83.218.05.427.73.525.62.2
medium gap23.23.128.06.424.13.324.22.1
large gap36.83.640.06.932.53.635.42.4
very large gap1.10.84.02.82.41.22.00.7
total100.0.100.0.100.0.100.0.
Southern Alpsno gap29.84.912.95.431.82.829.62.3
small gap20.84.435.87.735.72.832.62.3
medium gap18.54.223.06.712.62.014.81.8
large gap30.95.028.27.219.22.322.52.1
very large gap.0.0.0.00.70.50.50.3
total100.0.100.0.100.0.100.0.
Switzerlandno gap30.41.119.52.425.61.327.80.8
small gap33.31.128.82.733.71.433.10.8
medium gap16.00.922.62.516.81.116.80.6
large gap19.40.926.62.722.81.221.20.7
very large gap1.00.22.61.01.10.31.20.2
total100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151223/137603
NFI4b
number of forest plots
landslide/mudflow SilvaProtect · area of largest gap (aerial photo, 5 classes)
unit of reference: biogeographical region
unit: %
unit of evaluation: accessible forest without shrub forest NFI3/NFI4
grid: grid NFI4 2009-2013
state 2009/13
biogeographical region
JuraPlateauNorthern AlpsWestern Central-AlpsEastern Central-AlpsSouthern AlpsSwitzerland
landslide/mudflow SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %±
n/ano gap38.62.335.01.924.82.111.53.611.52.529.64.830.31.1
small gap36.72.338.41.928.62.224.04.826.43.520.94.333.31.1
medium gap11.41.513.71.418.81.927.85.023.33.419.94.216.00.9
large gap12.61.611.11.227.52.235.45.437.43.929.64.819.40.9
very large gap0.70.41.70.50.20.21.31.31.30.9.0.01.00.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap41.16.636.811.141.95.013.04.19.54.532.95.530.42.4
small gap28.66.052.611.528.64.637.75.828.67.034.25.632.72.5
medium gap17.95.15.35.110.23.118.84.726.26.812.33.815.11.9
large gap12.54.45.35.116.33.730.45.533.37.320.64.720.62.1
very large gap.0.0.0.03.11.7.0.02.42.4.0.01.10.6
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap40.46.833.36.121.11.916.13.19.32.628.72.822.51.3
small gap42.36.950.06.532.32.227.03.823.23.736.13.032.91.4
medium gap5.83.26.73.221.01.922.63.626.33.914.32.218.71.2
large gap11.54.410.03.924.32.031.44.038.04.320.12.524.41.3
very large gap.0.0.0.01.30.52.91.43.11.50.80.61.50.4
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap39.02.134.91.824.81.414.12.110.41.729.62.227.70.8
small gap36.42.139.81.830.41.528.72.725.52.432.52.333.10.8
medium gap11.51.412.91.219.01.323.12.524.92.415.21.816.80.7
large gap12.51.410.91.224.91.432.32.837.12.722.22.021.20.7
very large gap0.60.31.50.51.00.31.80.82.10.80.50.31.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151224/137604
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