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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 NFI1/NFI2/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 gap38.72.434.91.923.32.212.94.610.82.840.66.731.11.1
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 gap41.86.736.811.143.05.113.44.210.85.135.96.031.82.5
small gap27.36.052.611.529.04.737.35.927.07.334.45.932.52.6
medium gap18.25.25.35.19.73.119.44.829.77.512.54.115.52.0
large gap12.74.55.35.115.03.729.95.629.77.517.24.719.02.1
very large gap.0.0.0.03.21.8.0.02.72.7.0.01.20.6
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap41.26.933.36.120.81.916.03.38.62.630.13.122.71.3
small gap43.16.950.06.532.42.228.84.024.14.037.23.233.71.5
medium gap3.92.76.73.221.01.924.83.925.94.113.32.318.61.2
large gap11.84.510.03.924.52.128.84.137.94.518.52.623.71.3
very large gap.0.0.0.01.40.61.61.13.41.70.90.61.40.4
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 #151267/137647
NFI4b
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 2009/13
landslide/mudflow SilvaProtect
n/ainside perimeteroutside perimetertotal
cantonarea of largest gap (aerial photo, 5 classes) %± %± %± %±
AGno gap43.24.6.0.0.0.042.14.5
small gap35.64.466.727.3.0.036.44.4
medium gap10.22.833.327.3.0.010.72.8
large gap9.32.7.0.0.0.09.12.6
very large gap1.71.2.0.0.0.01.71.2
total100.0.100.0..0.0100.0.
AIno gap80.018.4.0.011.110.833.312.5
small gap.0.0100.0.55.616.940.013.0
medium gap.0.0.0.011.110.86.76.6
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 gap33.312.433.319.650.025.436.09.8
small gap60.012.833.319.6.0.044.010.1
medium gap.0.016.715.550.025.412.06.6
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 gap27.52.837.36.819.63.125.82.0
small gap38.83.127.46.238.13.737.32.2
medium gap18.02.413.74.816.02.816.91.7
large gap14.92.217.65.325.13.418.81.8
very large gap0.80.63.92.71.20.81.30.5
total100.0.100.0.100.0.100.0.
BL/BSno gap45.78.350.020.675.021.848.77.4
small gap38.08.0.0.025.021.832.06.9
medium gap2.72.750.020.6.0.08.54.1
large gap13.65.7.0.0.0.010.74.6
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
FRno gap29.25.775.021.717.05.926.34.2
small gap26.25.525.021.726.96.926.44.2
medium gap23.15.2.0.031.77.325.54.2
large gap20.05.0.0.024.46.720.93.9
very large gap1.51.5.0.0.0.00.90.9
total100.0.100.0.100.0.100.0.
GEno gap79.019.9.0.0.0.079.019.9
small gap.0.0.0.0.0.0.0.0
medium gap21.019.9.0.0.0.021.019.9
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 gap20.010.425.015.438.911.629.37.2
small gap20.010.462.517.211.17.524.46.8
medium gap26.711.5.0.016.78.917.15.9
large gap33.312.312.511.822.29.924.46.8
very large gap.0.0.0.011.17.54.93.4
total100.0.100.0.100.0.100.0.
GRno gap13.42.716.75.112.22.313.31.7
small gap28.03.627.86.128.93.228.42.2
medium gap24.83.425.96.022.83.024.02.1
large gap33.13.827.86.133.03.432.42.3
very large gap0.60.61.91.83.11.22.00.7
total100.0.100.0.100.0.100.0.
JUno gap38.56.540.022.024.08.634.45.1
small gap36.96.440.022.060.09.843.75.3
medium gap8.83.820.018.04.03.98.12.9
large gap14.14.6.0.012.06.512.73.6
very large gap1.81.8.0.0.0.01.21.2
total100.0.100.0.100.0.100.0.
LUno gap23.44.2100.0.19.08.623.33.8
small gap37.94.8.0.038.110.637.64.4
medium gap20.34.0.0.028.69.921.53.7
large gap15.53.6.0.014.37.715.23.2
very large gap2.91.7.0.0.0.02.41.4
total100.0.100.0.100.0.100.0.
NEno gap32.25.640.015.625.021.832.85.1
small gap46.56.040.015.675.021.747.15.4
medium gap15.74.410.09.5.0.014.33.8
large gap5.62.710.09.5.0.05.92.6
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
NWno gap30.014.8.0.050.020.835.311.8
small gap40.015.8100.0.50.020.847.112.3
medium gap10.09.7.0.0.0.05.95.8
large gap20.012.9.0.0.0.011.88.0
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
OWno gap31.89.425.021.818.28.325.46.1
small gap16.17.425.021.813.67.415.75.1
medium gap16.17.425.021.827.39.621.65.8
large gap36.19.725.021.840.910.637.36.8
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
SGno gap30.26.347.012.128.45.531.44.0
small gap26.46.135.311.637.35.932.84.0
medium gap20.75.65.95.713.44.215.33.1
large gap20.75.611.87.820.95.019.73.4
very large gap1.91.9.0.0.0.00.70.7
total100.0.100.0.100.0.100.0.
SHno gap47.18.650.035.8.0.047.28.4
small gap38.28.450.035.8.0.038.98.2
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
total100.0.100.0..0.0100.0.
SOno gap50.65.766.727.4100.0.53.05.5
small gap31.25.3.0.0.0.028.95.0
medium gap10.43.533.327.4.0.010.83.4
large gap7.83.1.0.0.0.07.22.9
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
SZno gap25.87.960.022.037.28.233.85.6
small gap29.08.220.018.022.87.125.35.2
medium gap6.54.4.0.017.16.411.33.8
large gap38.78.8.0.020.06.826.85.3
very large gap.0.020.018.02.92.82.82.0
total100.0.100.0.100.0.100.0.
TGno gap41.56.4100.0.50.017.844.15.9
small gap35.36.2.0.025.015.433.15.7
medium gap5.02.8.0.012.511.85.72.8
large gap16.64.8.0.012.511.815.74.4
very large gap1.71.7.0.0.0.01.41.4
total100.0.100.0.100.0.100.0.
TIno gap46.08.039.26.834.23.636.93.0
small gap23.26.835.36.736.03.634.02.9
medium gap12.95.49.84.212.92.512.32.0
large gap18.06.215.75.116.22.816.42.3
very large gap.0.0.0.00.60.60.40.4
total100.0.100.0.100.0.100.0.
URno gap6.56.440.015.628.310.723.46.5
small gap26.211.330.014.627.610.627.66.8
medium gap14.09.210.09.533.111.121.06.3
large gap53.313.020.012.711.07.428.06.9
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
VDno gap31.33.446.712.915.45.829.72.9
small gap37.03.540.012.751.38.039.43.1
medium gap13.62.56.76.512.95.413.02.2
large gap16.62.76.76.520.46.516.62.4
very large gap1.60.9.0.0.0.01.20.7
total100.0.100.0.100.0.100.0.
VSno gap13.34.417.64.416.03.115.82.2
small gap31.15.933.85.529.73.931.12.8
medium gap26.15.618.94.624.63.723.42.6
large gap27.95.829.75.328.33.828.62.7
very large gap1.61.6.0.01.41.01.10.6
total100.0.100.0.100.0.100.0.
ZGno gap50.025.9.0.025.015.830.813.3
small gap50.025.9100.0.37.517.746.214.3
medium gap.0.0.0.012.512.17.77.7
large gap.0.0.0.025.015.815.410.4
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
ZHno gap30.93.9.0.0.0.030.13.8
small gap43.24.2.0.066.727.343.44.1
medium gap15.83.1.0.0.0.015.43.0
large gap9.42.5100.0.33.327.310.52.6
very large gap0.70.7.0.0.0.00.70.7
total100.0.100.0.100.0.100.0.
Switzerlandno gap31.41.131.72.522.81.328.50.8
small gap34.91.232.72.633.71.534.20.9
medium gap15.50.915.62.018.51.216.50.7
large gap17.20.918.92.123.71.319.60.7
very large gap1.00.21.20.61.40.41.20.2
total100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151268/137648
NFI4b
number of forest plots
landslide/mudflow 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 2009/13
production region
JuraPlateauPre-AlpsAlpsSouthern AlpsSwitzerland
landslide/mudflow SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %±
n/ano gap41.12.434.22.024.52.714.52.041.06.931.21.1
small gap35.82.339.32.033.02.929.12.623.66.035.01.2
medium gap10.61.513.71.419.52.523.02.417.75.415.60.9
large gap11.81.611.01.322.62.632.82.717.75.417.20.9
very large gap0.70.41.90.60.40.40.70.5.0.01.00.2
total100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap39.26.850.012.543.97.822.63.336.56.131.82.5
small gap29.46.437.512.131.77.332.33.734.96.032.52.6
medium gap19.65.66.36.114.65.517.12.911.14.015.52.0
large gap11.84.56.36.19.84.625.63.417.54.819.02.1
very large gap.0.0.0.0.0.02.41.2.0.01.20.6
total100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap40.46.825.77.421.42.517.11.830.53.122.71.3
small gap44.26.960.08.335.02.927.92.136.83.233.71.5
medium gap3.82.75.73.920.72.522.72.013.52.318.51.2
large gap11.54.48.64.722.22.530.02.218.32.623.61.3
very large gap.0.0.0.00.80.52.30.70.90.61.40.4
total100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap40.92.134.21.924.51.817.21.333.22.628.40.8
small gap36.02.140.41.933.82.029.11.534.52.634.30.9
medium gap10.81.313.01.319.71.721.81.413.71.916.60.7
large gap11.81.410.71.221.51.730.11.518.12.119.60.7
very large gap0.60.31.70.50.50.31.80.40.60.41.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151269/137649
NFI4b
number of forest plots
landslide/mudflow 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 2009/13
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern AlpsSwitzerland
landslide/mudflow SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %±
n/ano gap37.11.520.22.727.13.913.34.412.52.841.06.931.11.1
small gap37.81.533.83.128.73.931.15.928.33.723.66.035.01.2
medium gap12.41.021.92.715.23.126.25.624.13.617.75.415.60.9
large gap11.31.024.12.828.33.927.95.834.54.017.75.417.20.9
very large gap1.40.4.0.00.80.81.61.60.70.7.0.01.00.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap41.86.040.57.640.57.217.64.414.35.436.56.131.82.5
small gap31.35.731.07.136.17.033.85.526.26.834.96.032.52.6
medium gap16.44.511.95.06.43.618.94.628.67.011.14.015.52.0
large gap10.43.711.95.014.95.229.75.328.67.017.54.819.02.1
very large gap.0.04.83.32.12.1.0.02.42.4.0.01.20.6
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap34.55.117.42.430.33.716.03.111.22.630.53.122.61.3
small gap50.65.434.53.029.73.629.73.925.73.536.83.233.71.5
medium gap4.62.221.32.517.63.024.63.725.03.513.52.318.61.2
large gap10.33.326.02.720.43.228.33.834.93.918.32.623.71.3
very large gap.0.00.80.51.91.11.41.03.31.40.90.61.40.4
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap37.21.420.51.830.52.515.82.212.11.833.22.628.30.8
small gap38.41.433.92.130.22.531.12.826.82.434.52.634.30.9
medium gap12.00.920.81.815.12.023.42.625.02.413.71.916.60.7
large gap11.20.924.11.922.72.328.62.733.92.618.12.119.60.7
very large gap1.20.30.80.41.50.71.10.62.10.80.60.41.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151270/137650
NFI4b
number of forest plots
landslide/mudflow 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 2009/13
landslide/mudflow SilvaProtect
n/ainside perimeteroutside perimetertotal
economic regionarea of largest gap (aerial photo, 5 classes) %± %± %± %±
Western Jurano gap39.02.739.07.637.57.038.82.4
small gap36.02.729.37.145.87.236.52.4
medium gap12.21.817.15.94.22.911.71.6
large gap12.21.814.65.512.54.812.51.6
very large gap0.60.4.0.0.0.00.50.3
total100.0.100.0.100.0.100.0.
Eastern Jurano gap47.54.940.015.575.021.747.84.6
small gap35.34.730.014.525.021.734.54.4
medium gap5.72.330.014.5.0.07.62.4
large gap10.53.0.0.0.0.09.32.7
very large gap1.01.0.0.0.0.00.80.8
total100.0.100.0.100.0.100.0.
Western Plateauno gap34.84.7.0.030.414.733.84.4
small gap35.94.750.035.569.614.739.14.6
medium gap12.73.3.0.0.0.011.43.0
large gap13.73.450.035.5.0.013.13.2
very large gap2.91.7.0.0.0.02.61.5
total100.0.100.0.100.0.100.0.
Central Plateauno gap32.33.366.715.77.77.432.23.2
small gap39.23.533.315.769.212.840.73.3
medium gap17.02.7.0.07.77.415.82.5
large gap9.02.0.0.015.410.09.01.9
very large gap2.51.1.0.0.0.02.31.0
total100.0.100.0.100.0.100.0.
Eastern Plateauno gap35.42.840.021.941.714.235.72.7
small gap40.62.940.021.941.714.240.62.8
medium gap11.71.920.017.98.38.011.71.8
large gap11.31.9.0.08.38.011.01.8
very large gap1.00.6.0.0.0.01.00.6
total100.0.100.0.100.0.100.0.
Western Pre-Alpsno gap27.86.955.616.613.54.522.54.0
small gap25.66.722.213.927.25.826.24.2
medium gap25.66.722.213.934.06.229.84.3
large gap21.06.2.0.025.35.721.63.9
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
Central Pre-Alpsno gap17.83.330.014.517.63.518.22.4
small gap34.84.140.015.540.34.537.53.0
medium gap21.53.520.012.716.83.419.32.4
large gap25.93.810.09.524.43.924.62.7
very large gap.0.0.0.00.80.80.40.4
total100.0.100.0.100.0.100.0.
Eastern Pre-Alpsno gap33.75.245.510.631.85.034.23.4
small gap33.75.231.89.933.05.033.23.4
medium gap13.23.79.16.117.04.014.52.5
large gap18.14.213.67.317.04.017.12.7
very large gap1.21.2.0.01.11.11.00.7
total100.0.100.0.100.0.100.0.
Northwestern Alpsno gap20.05.739.210.220.04.522.93.4
small gap38.06.930.49.631.25.233.33.8
medium gap20.05.74.34.318.74.417.03.0
large gap22.05.917.47.928.85.124.83.5
very large gap.0.08.75.91.21.22.01.1
total100.0.100.0.100.0.100.0.
Central Alpsno gap14.76.841.714.336.29.728.15.6
small gap18.47.525.012.619.98.020.25.0
medium gap11.36.28.38.031.99.318.84.9
large gap55.59.616.710.812.06.531.35.8
very large gap.0.08.38.0.0.01.61.6
total100.0.100.0.100.0.100.0.
Northeastern Alpsno gap18.28.330.812.924.56.423.84.8
small gap22.79.053.813.928.96.831.35.2
medium gap27.39.5.0.011.14.713.73.9
large gap31.810.015.410.031.16.928.75.1
very large gap.0.0.0.04.43.12.51.8
total100.0.100.0.100.0.100.0.
Southwestern Alpsno gap13.34.417.64.416.03.115.82.2
small gap31.15.933.85.529.73.931.12.8
medium gap26.25.618.94.624.63.723.42.6
large gap27.95.829.75.328.33.828.62.7
very large gap1.61.6.0.01.41.01.10.6
total100.0.100.0.100.0.100.0.
Southeastern Alpsno gap12.52.814.35.411.22.612.11.8
small gap28.33.726.26.825.73.526.82.4
medium gap24.13.628.67.025.03.525.02.4
large gap34.54.028.67.034.93.933.92.6
very large gap0.70.72.42.43.31.42.10.8
total100.0.100.0.100.0.100.0.
Southern Alpsno gap41.06.936.56.130.53.133.22.6
small gap23.66.034.96.036.83.234.52.6
medium gap17.75.411.14.013.52.313.71.9
large gap17.75.417.54.818.32.618.12.1
very large gap.0.0.0.00.90.60.60.4
total100.0.100.0.100.0.100.0.
Switzerlandno gap31.21.131.72.522.71.328.40.8
small gap35.01.232.52.633.71.534.30.9
medium gap15.50.915.62.018.61.216.50.7
large gap17.30.919.02.123.71.319.60.7
very large gap1.00.21.20.61.40.41.20.2
total100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151271/137651
NFI4b
number of forest plots
processes in channels 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
processes in channels 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 gap11.51.613.91.418.62.127.26.023.93.920.45.515.60.9
large gap12.41.610.71.227.32.427.36.035.64.416.75.117.30.9
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 gap41.56.836.56.121.61.915.22.88.32.531.22.823.31.2
small gap37.76.747.66.332.72.129.73.623.33.935.42.933.01.4
medium gap5.73.24.82.719.91.824.83.425.84.013.22.118.11.1
large gap15.14.911.14.023.92.029.13.538.34.419.52.424.01.3
very large gap.0.0.0.01.90.61.20.94.21.80.80.51.60.4
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap41.56.830.812.852.86.914.86.812.15.733.39.634.63.3
small gap32.16.461.513.524.55.944.39.630.38.050.010.235.43.4
medium gap17.05.27.77.411.34.411.16.030.38.012.56.815.82.6
large gap9.44.0.0.011.44.429.88.827.37.84.24.114.22.4
very large gap.0.0.0.0.0.0.0.0.0.0.0.0.0.0
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 #151272/137652
NFI4b
number of forest plots
processes in channels 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 2009/13
processes in channels SilvaProtect
n/ainside perimeteroutside perimetertotal
cantonarea of largest gap (aerial photo, 5 classes) %± %± %± %±
AGno gap42.14.5.0.0.0.042.14.5
small gap36.44.4.0.0.0.036.44.4
medium gap10.72.8.0.0.0.010.72.8
large gap9.12.6.0.0.0.09.12.6
very large gap1.71.2.0.0.0.01.71.2
total100.0..0.0.0.0100.0.
AIno gap80.018.4.0.0100.0.33.312.5
small gap.0.066.715.9.0.040.013.0
medium gap.0.011.110.8.0.06.76.6
large gap20.018.422.214.2.0.020.010.6
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
ARno gap33.312.442.919.033.327.736.09.8
small gap60.012.8.0.066.727.744.010.1
medium gap.0.042.919.0.0.012.06.6
large gap6.76.614.313.5.0.08.05.5
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
BEno gap27.52.819.73.041.47.725.82.0
small gap38.83.136.53.631.77.337.32.2
medium gap18.02.415.72.714.65.516.91.7
large gap14.92.225.93.312.35.218.81.8
very large gap0.80.62.21.1.0.01.30.5
total100.0.100.0.100.0.100.0.
BL/BSno gap45.78.375.021.850.020.648.77.4
small gap38.08.025.021.8.0.032.06.9
medium gap2.72.7.0.050.020.68.54.1
large gap13.65.7.0.0.0.010.74.6
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
FRno gap29.25.719.06.166.727.326.34.2
small gap26.25.526.26.833.327.326.44.2
medium gap23.15.231.07.2.0.025.54.2
large gap20.05.023.86.6.0.020.93.9
very large gap1.51.5.0.0.0.00.90.9
total100.0.100.0.100.0.100.0.
GEno gap79.019.9.0.0.0.079.019.9
small gap.0.0.0.0.0.0.0.0
medium gap21.019.9.0.0.0.021.019.9
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 gap20.010.436.811.228.617.229.37.2
small gap20.010.426.310.228.617.224.46.8
medium gap26.711.55.35.228.617.217.15.9
large gap33.312.321.19.414.313.324.46.8
very large gap.0.010.57.1.0.04.93.4
total100.0.100.0.100.0.100.0.
GRno gap13.42.711.52.220.96.213.31.7
small gap28.03.627.43.134.97.328.42.2
medium gap24.83.423.52.923.36.424.02.1
large gap33.13.834.23.320.96.232.42.3
very large gap0.60.63.41.3.0.02.00.7
total100.0.100.0.100.0.100.0.
JUno gap38.56.519.08.644.416.634.45.1
small gap36.96.466.710.333.315.843.75.3
medium gap8.83.84.84.711.110.58.12.9
large gap14.14.69.56.411.110.512.73.6
very large gap1.81.8.0.0.0.01.21.2
total100.0.100.0.100.0.100.0.
LUno gap23.44.219.08.6100.0.23.33.8
small gap37.94.838.110.6.0.037.64.4
medium gap20.34.028.69.9.0.021.53.7
large gap15.53.614.37.7.0.015.23.2
very large gap2.91.7.0.0.0.02.41.4
total100.0.100.0.100.0.100.0.
NEno gap32.25.640.022.033.315.832.85.1
small gap46.56.040.022.055.616.647.15.4
medium gap15.74.420.018.0.0.014.33.8
large gap5.62.7.0.011.110.55.92.6
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
NWno gap30.014.833.319.6100.0.35.311.8
small gap40.015.866.719.5.0.047.112.3
medium gap10.09.7.0.0.0.05.95.8
large gap20.012.9.0.0.0.011.88.0
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
OWno gap31.89.417.48.033.327.525.46.1
small gap16.17.413.07.133.327.515.75.1
medium gap16.17.426.19.233.327.521.65.8
large gap36.19.743.510.4.0.037.36.8
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
SGno gap30.26.332.05.433.315.831.44.0
small gap26.46.136.05.644.416.632.84.0
medium gap20.75.610.73.622.213.915.33.1
large gap20.75.621.44.7.0.019.73.4
very large gap1.91.9.0.0.0.00.70.7
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 gap50.65.7100.0.50.035.653.05.5
small gap31.25.3.0.0.0.028.95.0
medium gap10.43.5.0.050.035.610.83.4
large gap7.83.1.0.0.0.07.22.9
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
SZno gap25.87.936.18.175.021.733.85.6
small gap29.08.222.27.025.021.825.35.2
medium gap6.54.416.76.2.0.011.33.8
large gap38.78.819.46.6.0.026.85.3
very large gap.0.05.63.8.0.02.82.0
total100.0.100.0.100.0.100.0.
TGno gap41.56.460.015.6.0.044.15.9
small gap35.36.220.012.7.0.033.15.7
medium gap5.02.810.09.5.0.05.72.8
large gap16.64.810.09.5.0.015.74.4
very large gap1.71.7.0.0.0.01.41.4
total100.0.100.0..0.0100.0.
TIno gap46.08.035.53.333.311.136.93.0
small gap23.26.835.13.344.411.734.02.9
medium gap12.95.411.92.216.78.812.32.0
large gap18.06.217.02.65.65.416.42.3
very large gap.0.00.50.5.0.00.40.4
total100.0.100.0.100.0.100.0.
URno gap6.56.429.69.450.025.123.46.5
small gap26.211.329.09.325.021.827.66.8
medium gap14.09.229.09.3.0.021.06.3
large gap53.313.012.46.825.021.828.06.9
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
VDno gap31.33.420.16.044.416.629.72.9
small gap37.03.551.17.533.315.739.43.1
medium gap13.62.513.45.1.0.013.02.2
large gap16.62.715.45.422.213.916.62.4
very large gap1.60.9.0.0.0.01.20.7
total100.0.100.0.100.0.100.0.
VSno gap13.34.416.32.717.87.215.82.2
small gap31.15.929.33.442.89.431.12.8
medium gap26.15.624.43.210.75.823.42.6
large gap27.95.828.83.328.78.628.62.7
very large gap1.61.61.10.8.0.01.10.6
total100.0.100.0.100.0.100.0.
ZGno gap50.025.922.214.3.0.030.813.3
small gap50.025.944.417.1.0.046.214.3
medium gap.0.011.110.8.0.07.77.7
large gap.0.022.214.3.0.015.410.4
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0..0.0100.0.
ZHno gap30.73.9.0.0.0.030.13.8
small gap42.94.266.727.3.0.043.44.1
medium gap15.73.1.0.0.0.015.43.0
large gap10.02.533.327.3.0.010.52.6
very large gap0.70.7.0.0.0.00.70.7
total100.0.100.0..0.0100.0.
Switzerlandno gap31.31.123.41.234.73.428.50.8
small gap34.91.233.11.435.13.334.20.9
medium gap15.60.918.01.116.02.616.50.7
large gap17.20.924.01.314.22.419.60.7
very large gap1.00.21.60.4.0.01.20.2
total100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151273/137653
NFI4b
number of forest plots
processes in channels 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 2009/13
production region
JuraPlateauPre-AlpsAlpsSouthern AlpsSwitzerland
processes in channels SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %±
n/ano gap40.92.434.21.924.42.714.52.041.06.931.11.1
small gap36.12.339.22.032.82.929.12.623.66.035.01.2
medium gap10.61.513.81.419.52.423.02.417.75.415.60.9
large gap11.71.510.91.322.92.632.82.717.75.417.20.9
very large gap0.70.41.90.60.40.40.70.5.0.01.00.2
total100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap40.76.730.57.722.52.517.01.731.72.923.31.2
small gap38.96.655.68.335.02.928.52.035.13.033.01.4
medium gap5.63.15.63.820.02.422.11.813.02.118.11.1
large gap14.84.88.34.621.82.529.72.019.42.424.01.3
very large gap.0.0.0.00.70.52.70.70.80.51.60.4
total100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap40.47.242.913.246.29.827.24.633.39.634.63.3
small gap31.96.850.013.430.89.132.64.950.010.235.43.4
medium gap19.25.7.0.019.27.716.33.812.56.815.82.6
large gap8.54.17.16.93.83.723.94.54.24.114.12.4
very large gap.0.0.0.0.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap40.92.134.21.924.51.817.21.333.22.628.40.8
small gap36.02.140.41.933.82.029.11.534.52.634.30.9
medium gap10.81.313.01.319.71.721.81.413.71.916.60.7
large gap11.81.410.71.221.51.730.11.518.12.119.60.7
very large gap0.60.31.70.50.50.31.80.40.60.41.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151274/137654
NFI4b
number of forest plots
processes in channels 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 2009/13
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern AlpsSwitzerland
processes in channels SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %±
n/ano gap37.01.520.22.726.93.813.34.412.52.841.06.931.01.1
small gap37.91.533.83.128.43.931.15.928.33.723.66.035.11.2
medium gap12.41.021.92.715.03.126.25.624.13.617.75.415.60.9
large gap11.31.024.12.828.83.927.95.834.54.017.75.417.30.9
very large gap1.40.4.0.00.70.71.61.60.70.7.0.01.00.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap36.75.117.92.330.93.516.32.710.22.431.72.923.31.2
small gap45.65.334.82.931.43.529.33.424.83.535.13.033.01.4
medium gap5.62.420.92.515.12.724.43.225.53.513.02.118.11.1
large gap12.23.524.92.620.43.028.83.335.73.819.42.424.01.3
very large gap.0.01.50.72.21.11.10.83.81.50.80.51.60.4
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap41.06.348.19.646.29.817.87.218.96.433.39.634.63.3
small gap36.16.225.98.430.89.142.89.429.77.550.010.235.43.4
medium gap14.84.511.16.115.47.110.75.827.07.312.56.815.82.6
large gap8.23.514.86.87.75.228.78.624.37.14.24.114.22.4
very large gap.0.0.0.0.0.0.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap37.21.420.51.830.52.515.82.212.11.833.22.628.30.8
small gap38.41.433.92.130.22.531.12.826.82.434.52.634.30.9
medium gap12.00.920.81.815.12.023.42.625.02.413.71.916.60.7
large gap11.20.924.11.922.72.328.62.733.92.618.12.119.60.7
very large gap1.20.30.80.41.50.71.10.62.10.80.60.41.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151275/137655
NFI4b
number of forest plots
processes in channels 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 2009/13
processes in channels SilvaProtect
n/ainside perimeteroutside perimetertotal
economic regionarea of largest gap (aerial photo, 5 classes) %± %± %± %±
Western Jurano gap39.02.738.06.938.47.838.82.4
small gap36.02.740.06.936.07.736.52.4
medium gap12.21.86.03.415.45.811.71.6
large gap12.21.816.05.210.24.912.51.6
very large gap0.60.4.0.0.0.00.50.3
total100.0.100.0.100.0.100.0.
Eastern Jurano gap46.74.875.021.750.017.747.84.6
small gap36.54.725.021.712.511.734.54.4
medium gap5.62.2.0.037.517.27.62.4
large gap10.32.9.0.0.0.09.32.7
very large gap0.90.9.0.0.0.00.80.8
total100.0.100.0.100.0.100.0.
Western Plateauno gap34.84.730.414.7.0.033.84.4
small gap35.94.769.614.750.035.539.14.6
medium gap12.73.3.0.0.0.011.43.0
large gap13.73.4.0.050.035.513.13.2
very large gap2.91.7.0.0.0.02.61.5
total100.0.100.0.100.0.100.0.
Central Plateauno gap32.33.38.38.060.015.532.23.2
small gap39.23.566.713.640.015.540.73.3
medium gap17.02.78.38.0.0.015.82.5
large gap9.02.016.710.8.0.09.01.9
very large gap2.51.1.0.0.0.02.31.0
total100.0.100.0.100.0.100.0.
Eastern Plateauno gap35.32.850.013.4.0.035.72.7
small gap40.42.935.712.8100.0.40.62.8
medium gap12.01.97.16.9.0.011.71.8
large gap11.31.97.16.9.0.011.01.8
very large gap1.00.6.0.0.0.01.00.6
total100.0.100.0.100.0.100.0.
Western Pre-Alpsno gap27.86.915.24.744.716.622.54.0
small gap25.66.727.25.822.314.026.24.2
medium gap25.66.734.06.222.314.029.84.3
large gap21.06.223.75.610.610.121.63.9
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
Central Pre-Alpsno gap17.83.317.73.440.021.918.22.4
small gap34.84.140.34.440.021.937.53.0
medium gap21.53.516.93.420.017.919.32.4
large gap25.93.824.23.9.0.024.62.7
very large gap.0.00.80.8.0.00.40.4
total100.0.100.0.100.0.100.0.
Eastern Pre-Alpsno gap33.35.233.04.850.014.534.23.4
small gap33.35.133.04.833.313.633.23.4
medium gap13.13.715.53.716.710.814.52.5
large gap19.04.317.53.9.0.017.12.7
very large gap1.21.21.01.0.0.01.00.7
total100.0.100.0.100.0.100.0.
Northwestern Alpsno gap20.05.720.04.253.913.922.93.4
small gap38.06.932.24.923.011.733.33.8
medium gap20.05.717.84.0.0.017.03.0
large gap22.05.926.74.723.011.724.83.5
very large gap.0.03.31.9.0.02.01.1
total100.0.100.0.100.0.100.0.
Central Alpsno gap14.76.834.58.560.022.028.15.6
small gap18.47.521.87.320.018.020.25.0
medium gap11.36.228.18.0.0.018.84.9
large gap55.59.612.55.920.018.031.35.8
very large gap.0.03.13.1.0.01.61.6
total100.0.100.0.100.0.100.0.
Northeastern Alpsno gap18.28.324.56.233.315.823.84.8
small gap22.79.034.76.833.315.831.35.2
medium gap27.39.56.13.422.213.913.73.9
large gap31.810.030.66.611.110.528.75.1
very large gap.0.04.12.8.0.02.51.8
total100.0.100.0.100.0.100.0.
Southwestern Alpsno gap13.34.416.32.717.87.215.82.2
small gap31.15.929.33.442.89.431.12.8
medium gap26.25.624.43.210.75.823.42.6
large gap27.95.828.83.328.78.628.62.7
very large gap1.61.61.10.8.0.01.10.6
total100.0.100.0.100.0.100.0.
Southeastern Alpsno gap12.52.810.22.418.96.412.11.8
small gap28.33.724.83.529.77.526.82.4
medium gap24.13.625.53.527.07.325.02.4
large gap34.54.035.73.824.37.133.92.6
very large gap0.70.73.81.5.0.02.10.8
total100.0.100.0.100.0.100.0.
Southern Alpsno gap41.06.931.72.933.39.633.22.6
small gap23.66.035.13.050.010.234.52.6
medium gap17.75.413.02.112.56.813.71.9
large gap17.75.419.42.44.24.118.12.1
very large gap.0.00.80.5.0.00.60.4
total100.0.100.0.100.0.100.0.
Switzerlandno gap31.11.123.31.234.53.328.40.8
small gap35.01.233.01.435.33.434.30.9
medium gap15.50.918.11.116.02.616.50.7
large gap17.30.924.01.314.32.519.60.7
very large gap1.00.21.60.4.0.01.20.2
total100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151276/137656
NFI4b
number of forest plots
protection forest perimeter 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
protection forest perimeter SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %±
outside of perimeterno 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 gap41.54.834.25.324.71.915.12.69.12.331.42.724.91.2
small gap34.94.650.65.631.82.031.83.424.83.536.62.833.41.3
medium gap11.33.16.32.719.01.722.93.026.83.613.12.017.81.0
large gap12.33.28.93.222.81.829.23.336.03.918.22.322.51.1
very large gap.0.0.0.01.70.61.00.73.31.40.70.51.30.3
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 #151277/137657
NFI4b
number of forest plots
protection forest perimeter 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 2009/13
protection forest perimeter SilvaProtect
outside of perimeterinside perimetertotal
cantonarea of largest gap (aerial photo, 5 classes) %± %± %±
AGno gap43.24.6.0.042.14.5
small gap35.64.466.727.336.44.4
medium gap10.22.833.327.310.72.8
large gap9.32.7.0.09.12.6
very large gap1.71.2.0.01.71.2
total100.0.100.0.100.0.
AIno gap80.018.410.09.833.312.5
small gap.0.060.015.740.013.0
medium gap.0.010.09.86.76.6
large gap20.018.420.013.020.010.6
very large gap.0.0.0.0.0.0
total100.0.100.0.100.0.
ARno gap33.312.440.015.836.09.8
small gap60.012.820.012.944.010.1
medium gap.0.030.014.812.06.6
large gap6.76.610.09.78.05.5
very large gap.0.0.0.0.0.0
total100.0.100.0.100.0.
BEno gap27.52.823.82.925.82.0
small gap38.83.135.63.237.32.2
medium gap18.02.415.52.416.91.7
large gap14.92.223.32.918.81.8
very large gap0.80.61.80.91.30.5
total100.0.100.0.100.0.
BL/BSno gap45.78.360.015.648.77.4
small gap38.08.010.09.632.06.9
medium gap2.72.730.014.68.54.1
large gap13.65.7.0.010.74.6
very large gap.0.0.0.0.0.0
total100.0.100.0.100.0.
FRno gap29.25.722.16.226.34.2
small gap26.25.526.76.626.44.2
medium gap23.15.228.96.825.54.2
large gap20.05.022.26.220.93.9
very large gap1.51.5.0.00.90.9
total100.0.100.0.100.0.
GEno gap79.019.9.0.079.019.9
small gap.0.0.0.0.0.0
medium gap21.019.9.0.021.019.9
large gap.0.0.0.0.0.0
very large gap.0.0.0.0.0.0
total100.0..0.0100.0.
GLno gap20.010.434.69.429.37.2
small gap20.010.426.98.824.46.8
medium gap26.711.511.56.317.15.9
large gap33.312.319.27.824.46.8
very large gap.0.07.75.34.93.4
total100.0.100.0.100.0.
GRno gap13.42.713.12.113.31.7
small gap28.03.628.72.928.42.2
medium gap24.83.423.52.724.02.1
large gap33.13.831.92.932.42.3
very large gap0.60.62.81.02.00.7
total100.0.100.0.100.0.
JUno gap38.56.526.78.134.45.1
small gap36.96.456.79.043.75.3
medium gap8.83.86.74.68.12.9
large gap14.14.610.05.512.73.6
very large gap1.81.8.0.01.21.2
total100.0.100.0.100.0.
LUno gap23.44.222.79.023.33.8
small gap37.94.836.410.337.64.4
medium gap20.34.027.39.521.53.7
large gap15.53.613.67.315.23.2
very large gap2.91.7.0.02.41.4
total100.0.100.0.100.0.
NEno gap32.25.635.712.932.85.1
small gap46.56.050.013.447.15.4
medium gap15.74.47.16.914.33.8
large gap5.62.77.16.95.92.6
very large gap.0.0.0.0.0.0
total100.0.100.0.100.0.
NWno gap30.014.842.919.135.311.8
small gap40.015.857.119.047.112.3
medium gap10.09.7.0.05.95.8
large gap20.012.9.0.011.88.0
very large gap.0.0.0.0.0.0
total100.0.100.0.100.0.
OWno gap31.89.419.27.825.46.1
small gap16.17.415.47.115.75.1
medium gap16.17.426.98.821.65.8
large gap36.19.738.59.637.36.8
very large gap.0.0.0.0.0.0
total100.0.100.0.100.0.
SGno gap30.26.332.15.131.44.0
small gap26.46.136.95.332.84.0
medium gap20.75.611.93.515.33.1
large gap20.75.619.14.319.73.4
very large gap1.91.9.0.00.70.7
total100.0.100.0.100.0.
SHno gap47.18.650.035.847.28.4
small gap38.28.450.035.838.98.2
medium gap5.94.1.0.05.63.9
large gap8.84.9.0.08.34.7
very large gap.0.0.0.0.0.0
total100.0.100.0.100.0.
SOno gap50.65.783.315.353.05.5
small gap31.25.3.0.028.95.0
medium gap10.43.516.715.310.83.4
large gap7.83.1.0.07.22.9
very large gap.0.0.0.0.0.0
total100.0.100.0.100.0.
SZno gap25.87.940.07.833.85.6
small gap29.08.222.56.625.35.2
medium gap6.54.415.05.711.33.8
large gap38.78.817.56.026.85.3
very large gap.0.05.03.52.82.0
total100.0.100.0.100.0.
TGno gap41.56.460.015.644.15.9
small gap35.36.220.012.733.15.7
medium gap5.02.810.09.55.72.8
large gap16.64.810.09.515.74.4
very large gap1.71.7.0.01.41.4
total100.0.100.0.100.0.
TIno gap46.08.035.43.236.93.0
small gap23.26.835.93.234.02.9
medium gap12.95.412.22.212.32.0
large gap18.06.216.12.416.42.3
very large gap.0.00.40.40.40.4
total100.0.100.0.100.0.
URno gap6.56.432.58.923.46.5
small gap26.211.328.48.627.66.8
medium gap14.09.224.98.221.06.3
large gap53.313.014.26.628.06.9
very large gap.0.0.0.0.0.0
total100.0.100.0.100.0.
VDno gap31.33.424.15.829.72.9
small gap37.03.548.16.839.43.1
medium gap13.62.511.14.313.02.2
large gap16.62.716.65.116.62.4
very large gap1.60.9.0.01.20.7
total100.0.100.0.100.0.
VSno gap13.34.416.52.615.82.2
small gap31.15.931.13.231.12.8
medium gap26.15.622.62.923.42.6
large gap27.95.828.83.128.62.7
very large gap1.61.60.90.71.10.6
total100.0.100.0.100.0.
ZGno gap50.025.922.214.330.813.3
small gap50.025.944.417.146.214.3
medium gap.0.011.110.87.77.7
large gap.0.022.214.315.410.4
very large gap.0.0.0.0.0.0
total100.0.100.0.100.0.
ZHno gap30.93.9.0.030.13.8
small gap43.24.250.025.143.44.1
medium gap15.83.1.0.015.43.0
large gap9.42.550.025.110.52.6
very large gap0.70.7.0.00.70.7
total100.0.100.0.100.0.
Switzerlandno gap31.41.125.01.228.50.8
small gap34.91.233.41.334.20.9
medium gap15.50.917.81.016.50.7
large gap17.20.922.51.119.60.7
very large gap1.00.21.30.31.20.2
total100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151278/137658
NFI4b
number of forest plots
protection forest perimeter 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 2009/13
production region
JuraPlateauPre-AlpsAlpsSouthern AlpsSwitzerland
protection forest perimeter SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %±
outside of perimeterno gap41.12.434.22.024.52.714.52.041.06.931.21.1
small gap35.82.339.32.033.02.929.12.623.66.035.01.2
medium gap10.61.513.71.419.52.523.02.417.75.415.60.9
large gap11.81.611.01.322.62.632.82.717.75.417.20.9
very large gap0.70.41.90.60.40.40.70.5.0.01.00.2
total100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap39.84.833.36.624.42.518.61.631.82.825.01.2
small gap36.94.853.07.034.52.729.11.836.42.833.41.3
medium gap11.73.25.93.319.92.321.21.712.92.017.81.0
large gap11.73.27.83.820.52.328.81.818.22.322.51.1
very large gap.0.0.0.00.70.52.30.60.70.51.30.3
total100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap40.92.134.21.924.51.817.21.333.22.628.40.8
small gap36.02.140.41.933.82.029.11.534.52.634.30.9
medium gap10.81.313.01.319.71.721.81.413.71.916.60.7
large gap11.81.410.71.221.51.730.11.518.12.119.60.7
very large gap0.60.31.70.50.50.31.80.40.60.41.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151279/137659
NFI4b
number of forest plots
protection forest perimeter 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 2009/13
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern AlpsSwitzerland
protection forest perimeter SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %±
outside of perimeterno gap37.11.520.22.727.13.913.34.412.52.841.06.931.11.1
small gap37.81.533.83.128.73.931.15.928.33.723.66.035.01.2
medium gap12.41.021.92.715.23.126.25.624.13.617.75.415.60.9
large gap11.31.024.12.828.33.927.95.834.54.017.75.417.20.9
very large gap1.40.4.0.00.80.81.61.60.70.7.0.01.00.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap37.73.920.72.332.73.316.52.611.92.331.82.824.91.2
small gap42.24.034.02.731.23.231.13.225.83.136.42.833.41.3
medium gap9.72.420.02.315.12.522.62.925.83.112.92.017.81.0
large gap10.42.524.02.519.22.828.83.133.53.418.22.322.61.1
very large gap.0.01.30.71.91.00.90.73.11.20.70.51.30.3
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap37.21.420.51.830.52.515.82.212.11.833.22.628.30.8
small gap38.41.433.92.130.22.531.12.826.82.434.52.634.30.9
medium gap12.00.920.81.815.12.023.42.625.02.413.71.916.60.7
large gap11.20.924.11.922.72.328.62.733.92.618.12.119.60.7
very large gap1.20.30.80.41.50.71.10.62.10.80.60.41.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151280/137660
NFI4b
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 2009/13
protection forest perimeter SilvaProtect
outside of perimeterinside perimetertotal
economic regionarea of largest gap (aerial photo, 5 classes) %± %± %±
Western Jurano gap39.02.738.25.238.82.4
small gap36.02.738.25.236.52.4
medium gap12.21.810.13.211.71.6
large gap12.21.813.53.612.51.6
very large gap0.60.4.0.00.50.3
total100.0.100.0.100.0.
Eastern Jurano gap47.54.950.013.447.84.6
small gap35.34.728.612.134.54.4
medium gap5.72.321.411.07.62.4
large gap10.53.0.0.09.32.7
very large gap1.01.0.0.00.80.8
total100.0.100.0.100.0.
Western Plateauno gap34.84.725.312.733.84.4
small gap35.94.766.313.739.14.6
medium gap12.73.3.0.011.43.0
large gap13.73.48.48.113.13.2
very large gap2.91.7.0.02.61.5
total100.0.100.0.100.0.
Central Plateauno gap32.33.331.89.932.23.2
small gap39.23.554.510.640.73.3
medium gap17.02.74.54.515.82.5
large gap9.02.09.16.19.01.9
very large gap2.51.1.0.02.31.0
total100.0.100.0.100.0.
Eastern Plateauno gap35.42.841.211.935.72.7
small gap40.62.941.211.940.62.8
medium gap11.71.911.87.811.71.8
large gap11.31.95.95.711.01.8
very large gap1.00.6.0.01.00.6
total100.0.100.0.100.0.
Western Pre-Alpsno gap27.86.919.14.822.54.0
small gap25.66.726.55.426.24.2
medium gap25.66.732.45.729.84.3
large gap21.06.222.05.021.63.9
very large gap.0.0.0.0.0.0
total100.0.100.0.100.0.
Central Pre-Alpsno gap17.83.318.63.418.22.4
small gap34.84.140.34.337.53.0
medium gap21.53.517.13.319.32.4
large gap25.93.823.33.724.62.7
very large gap.0.00.80.80.40.4
total100.0.100.0.100.0.
Eastern Pre-Alpsno gap33.75.234.54.534.23.4
small gap33.75.232.74.533.23.4
medium gap13.23.715.53.514.52.5
large gap18.14.216.43.517.12.7
very large gap1.21.20.90.91.00.7
total100.0.100.0.100.0.
Northwestern Alpsno gap20.05.724.34.222.93.4
small gap38.06.931.14.633.33.8
medium gap20.05.715.53.617.03.0
large gap22.05.926.24.324.83.5
very large gap.0.02.91.72.01.1
total100.0.100.0.100.0.
Central Alpsno gap14.76.838.08.028.15.6
small gap18.47.521.66.820.25.0
medium gap11.36.224.37.118.84.9
large gap55.59.613.55.631.35.8
very large gap.0.02.72.71.61.6
total100.0.100.0.100.0.
Northeastern Alpsno gap18.28.325.95.823.84.8
small gap22.79.034.56.331.35.2
medium gap27.39.58.63.713.73.9
large gap31.810.027.65.928.75.1
very large gap.0.03.42.42.51.8
total100.0.100.0.100.0.
Southwestern Alpsno gap13.34.416.52.615.82.2
small gap31.15.931.13.231.12.8
medium gap26.25.622.62.923.42.6
large gap27.95.828.83.128.62.7
very large gap1.61.60.90.71.10.6
total100.0.100.0.100.0.
Southeastern Alpsno gap12.52.811.92.312.11.8
small gap28.33.725.83.126.82.4
medium gap24.13.625.83.125.02.4
large gap34.54.033.53.433.92.6
very large gap0.70.73.11.22.10.8
total100.0.100.0.100.0.
Southern Alpsno gap41.06.931.82.833.22.6
small gap23.66.036.42.834.52.6
medium gap17.75.412.92.013.71.9
large gap17.75.418.22.318.12.1
very large gap.0.00.70.50.60.4
total100.0.100.0.100.0.
Switzerlandno gap31.21.124.91.228.40.8
small gap35.01.233.41.334.30.9
medium gap15.50.917.81.016.50.7
large gap17.30.922.51.119.60.7
very large gap1.00.21.30.31.20.2
total100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151281/137661
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
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 gap38.32.335.31.928.12.115.43.913.52.629.94.431.21.1
small gap36.92.338.31.927.72.122.04.524.43.321.23.932.61.1
medium gap11.51.513.61.317.51.825.44.722.13.219.83.915.70.8
large gap12.61.611.01.226.42.136.15.237.53.728.04.419.50.9
very large gap0.70.41.70.50.20.21.21.22.41.21.01.01.10.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap22.213.9.0.042.97.612.56.720.012.632.38.029.84.2
small gap22.413.950.035.423.86.624.98.820.012.629.47.825.64.0
medium gap33.315.750.035.414.35.424.98.820.012.614.76.119.03.6
large gap22.213.9.0.016.75.837.79.940.115.523.67.324.83.9
very large gap.0.0.0.02.42.4.0.0.0.0.0.00.80.8
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap42.45.035.15.423.21.815.62.710.22.329.22.624.01.2
small gap36.44.850.75.732.12.031.23.424.43.336.92.833.51.3
medium gap10.13.05.22.519.71.720.43.025.63.413.52.017.61.0
large gap11.13.29.13.323.51.930.13.436.93.719.72.323.51.1
very large gap.0.0.0.01.50.52.71.23.01.30.70.51.50.3
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap38.82.135.21.826.21.415.32.112.11.729.62.228.30.8
small gap36.62.139.71.829.81.428.02.624.32.332.62.232.70.8
medium gap11.61.412.91.218.51.222.22.423.72.315.11.716.50.6
large gap12.51.410.81.124.51.432.52.737.32.622.02.021.20.7
very large gap0.60.31.50.51.00.32.00.82.60.90.70.41.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151296/137676
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
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 gap38.012.4.0.040.015.838.89.7
small gap55.812.5.0.020.012.942.19.8
medium gap.0.0.0.030.014.811.56.4
large gap6.26.1.0.010.09.77.75.3
very large gap.0.0.0.0.0.0.0.0
total100.0..0.0100.0.100.0.
BEno gap29.22.741.011.922.52.926.82.0
small gap37.22.918.09.436.83.336.42.1
medium gap17.92.323.410.314.82.516.81.7
large gap15.02.117.69.224.03.018.81.7
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 gap31.75.6.0.021.26.027.44.1
small gap24.75.2.0.027.76.525.94.1
medium gap23.35.1.0.029.86.725.94.1
large gap18.94.7.0.021.36.019.93.7
very large gap1.51.4.0.0.0.00.90.9
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 gap25.69.942.918.928.710.029.66.7
small gap15.98.528.617.233.110.325.56.4
medium gap31.910.814.313.39.66.519.35.8
large gap26.610.214.313.319.18.721.46.0
very large gap.0.0.0.09.66.54.33.0
total100.0.100.0.100.0.100.0.
GRno gap15.72.419.08.513.82.114.91.6
small gap23.12.833.210.327.22.725.61.9
medium gap22.32.819.08.522.72.622.41.8
large gap37.13.228.99.933.62.934.92.1
very large gap1.80.9.0.02.61.02.20.6
total100.0.100.0.100.0.100.0.
JUno gap37.96.433.327.425.98.534.15.1
small gap36.36.333.327.459.39.443.35.3
medium gap10.24.0.0.07.45.19.03.1
large gap13.84.633.327.47.45.112.53.5
very large gap1.71.7.0.0.0.01.11.1
total100.0.100.0.100.0.100.0.
LUno gap24.54.2.0.022.79.024.23.8
small gap38.44.7.0.036.410.338.14.3
medium gap19.53.8.0.027.39.520.83.6
large gap14.83.4.0.013.67.314.63.1
very large gap2.81.6.0.0.0.02.31.3
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 gap33.09.1.0.019.47.825.35.9
small gap15.06.950.035.711.66.414.74.8
medium gap15.06.9.0.027.18.820.25.5
large gap37.19.450.035.741.99.739.86.7
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
SGno gap33.85.720.017.932.95.132.93.7
small gap22.15.040.022.035.35.229.83.6
medium gap17.64.640.022.011.83.515.22.9
large gap25.05.3.0.020.04.321.53.3
very large gap1.51.5.0.0.0.00.60.6
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 gap50.65.750.035.5100.0.52.95.4
small gap31.65.3.0.0.0.029.45.0
medium gap10.13.450.035.5.0.010.63.4
large gap7.63.0.0.0.0.07.12.8
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
SZno gap29.87.525.021.842.57.935.85.3
small gap24.37.125.021.820.06.422.24.6
medium gap8.14.525.021.815.05.712.33.7
large gap37.88.0.0.020.06.427.25.0
very large gap.0.025.021.82.52.52.51.7
total100.0.100.0.100.0.100.0.
TGno gap40.06.2.0.060.015.642.75.8
small gap36.16.2.0.020.012.733.85.6
medium gap6.43.1.0.010.09.56.93.0
large gap16.04.7.0.010.09.515.24.2
very large gap1.61.6.0.0.0.01.41.4
total100.0..0.0100.0.100.0.
TIno gap32.55.339.110.232.13.032.72.5
small gap22.44.721.78.637.53.132.92.5
medium gap17.74.313.07.012.82.113.91.9
large gap26.14.926.19.217.22.419.92.1
very large gap1.31.3.0.00.40.40.60.4
total100.0.100.0.100.0.100.0.
URno gap16.27.533.315.827.79.623.45.7
small gap27.48.933.315.827.19.528.26.0
medium gap12.36.7.0.031.610.017.95.2
large gap44.110.033.315.813.67.330.56.2
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
VDno gap31.33.2100.0.21.95.629.82.8
small gap36.53.3.0.047.36.738.53.0
medium gap13.52.4.0.014.64.813.62.1
large gap17.22.6.0.016.35.016.92.3
very large gap1.40.8.0.0.0.01.10.7
total100.0.100.0.100.0.100.0.
VSno gap17.23.812.56.716.82.616.62.0
small gap25.04.324.98.831.13.228.82.5
medium gap22.94.224.98.820.62.821.62.3
large gap34.04.737.79.929.23.131.22.5
very large gap1.01.0.0.02.41.11.80.7
total100.0.100.0.100.0.100.0.
ZGno gap48.321.0.0.022.214.332.412.4
small gap51.721.0.0.044.417.147.313.3
medium gap.0.0.0.011.110.86.86.8
large gap.0.0.0.022.214.313.59.2
very large gap.0.0.0.0.0.0.0.0
total100.0..0.0100.0.100.0.
ZHno gap32.93.9.0.0.0.032.03.9
small gap41.94.1.0.050.025.142.14.1
medium gap15.43.0.0.0.0.015.02.9
large gap9.12.4.0.050.025.110.22.5
very large gap0.70.7.0.0.0.00.70.7
total100.0..0.0100.0.100.0.
Switzerlandno gap31.41.129.94.224.11.228.40.8
small gap32.51.125.64.033.51.332.70.8
medium gap15.60.819.03.617.61.016.50.6
large gap19.40.924.63.923.41.121.20.7
very large gap1.10.20.80.81.50.31.20.2
total100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151297/137677
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
grid: grid NFI4 2009-2013
state 2009/13
production region
JuraPlateauPre-AlpsAlpsSouthern AlpsSwitzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %±
n/ano gap40.92.334.51.928.22.618.81.930.04.531.21.1
small gap36.02.338.72.030.62.724.72.121.24.032.61.1
medium gap10.71.513.51.418.52.221.32.018.63.915.70.8
large gap11.81.511.51.322.52.434.02.329.14.519.40.9
very large gap0.70.41.80.50.30.31.20.51.01.01.10.2
total100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap22.213.9.0.025.015.331.45.530.38.029.74.2
small gap22.113.8100.0.25.015.322.85.030.38.025.64.0
medium gap33.415.7.0.037.517.117.14.515.16.219.13.6
large gap22.213.9.0.012.511.727.35.324.37.524.83.9
very large gap.0.0.0.0.0.01.41.4.0.00.80.8
total100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap40.65.034.06.725.22.517.21.529.42.624.11.2
small gap38.55.052.07.134.32.729.01.836.82.833.51.3
medium gap10.43.16.03.419.42.320.91.713.42.017.61.0
large gap10.43.18.03.820.42.330.31.919.72.323.41.1
very large gap.0.0.0.00.60.52.70.70.70.51.50.3
total100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap40.52.134.41.926.61.818.71.229.62.228.30.8
small gap36.22.039.81.932.41.926.91.332.62.332.70.8
medium gap11.01.312.91.319.21.620.81.214.81.716.50.6
large gap11.71.411.21.221.31.731.61.422.32.021.20.7
very large gap0.50.31.70.50.50.32.00.40.70.41.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151298/137678
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
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 gap37.21.524.42.631.83.617.23.815.02.530.04.531.21.1
small gap37.61.531.82.924.53.325.04.323.73.021.24.032.61.1
medium gap12.31.021.02.514.72.722.94.222.32.918.63.915.70.8
large gap11.61.022.82.628.43.534.04.736.93.429.14.519.40.9
very large gap1.30.4.0.00.60.61.01.02.01.01.01.01.10.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap20.012.655.611.732.09.312.56.727.213.430.38.029.94.2
small gap30.114.511.17.432.09.324.98.818.111.630.38.025.54.0
medium gap30.014.516.78.816.07.324.98.818.111.615.16.219.03.6
large gap20.012.616.78.816.07.337.79.936.614.624.37.524.83.9
very large gap.0.0.0.04.03.9.0.0.0.0.0.00.80.8
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap38.44.019.02.332.03.316.82.612.82.329.42.624.01.2
small gap43.24.134.62.830.83.331.13.225.53.036.82.833.51.3
medium gap8.92.420.72.415.22.620.62.824.53.013.42.017.61.0
large gap9.62.424.42.520.52.929.23.134.43.319.72.323.51.1
very large gap.0.01.40.71.50.92.41.12.81.10.70.51.50.3
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap37.21.422.61.731.92.416.62.014.21.729.62.228.20.8
small gap38.21.432.61.928.22.328.82.524.42.132.62.332.70.8
medium gap12.00.920.71.715.01.821.62.323.32.114.81.716.60.6
large gap11.50.923.41.823.62.231.22.535.62.322.32.021.20.7
very large gap1.20.30.70.31.30.61.80.72.40.70.70.41.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151299/137679
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
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 gap38.32.624.915.338.65.338.12.3
small gap36.62.625.415.539.75.437.02.3
medium gap12.31.824.915.39.63.212.01.6
large gap12.31.824.915.312.03.612.51.6
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 gap34.54.6.0.025.312.733.64.3
small gap34.64.6.0.066.313.737.84.5
medium gap12.23.2.0.0.0.011.02.9
large gap15.83.5.0.08.48.115.13.3
very large gap2.81.6.0.0.0.02.51.5
total100.0..0.0100.0.100.0.
Central Plateauno gap32.73.3.0.033.310.332.63.2
small gap38.93.5100.0.52.410.940.53.3
medium gap16.92.6.0.04.84.715.72.4
large gap9.02.0.0.09.56.49.01.9
very large gap2.51.1.0.0.0.02.21.0
total100.0.100.0.100.0.100.0.
Eastern Plateauno gap35.72.8.0.041.211.936.02.7
small gap40.02.8.0.041.211.940.12.8
medium gap11.71.9.0.011.87.811.71.8
large gap11.71.9.0.05.95.711.41.8
very large gap1.00.6.0.0.0.00.90.5
total100.0..0.0100.0.100.0.
Western Pre-Alpsno gap31.16.4.0.019.74.724.23.9
small gap21.75.8.0.026.85.324.53.9
medium gap25.66.1100.0.32.55.630.24.1
large gap21.75.8.0.021.04.821.13.7
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
Central Pre-Alpsno gap21.43.325.021.718.93.520.32.4
small gap34.03.925.021.740.24.336.62.9
medium gap20.03.325.021.716.53.318.52.3
large gap24.73.525.021.723.63.824.22.6
very large gap.0.0.0.00.80.80.40.4
total100.0.100.0.100.0.100.0.
Eastern Pre-Alpsno gap37.14.933.327.336.04.636.53.3
small gap29.94.633.327.332.44.531.33.2
medium gap12.43.433.327.314.43.313.72.4
large gap19.64.0.0.016.23.517.52.6
very large gap1.01.0.0.00.90.90.90.7
total100.0.100.0.100.0.100.0.
Northwestern Alpsno gap25.85.469.212.818.64.025.03.3
small gap34.85.97.77.433.04.831.83.5
medium gap19.74.97.77.417.53.917.62.9
large gap19.74.915.410.027.84.623.93.2
very large gap.0.0.0.03.11.81.71.0
total100.0.100.0.100.0.100.0.
Central Alpsno gap20.16.433.313.734.58.427.44.9
small gap19.76.325.012.618.76.920.14.4
medium gap10.14.88.38.028.08.016.64.1
large gap50.17.925.012.618.97.034.75.2
very large gap.0.08.38.0.0.01.21.2
total100.0.100.0.100.0.100.0.
Northeastern Alpsno gap30.48.030.014.522.75.826.14.5
small gap15.16.340.015.534.06.528.14.6
medium gap27.37.820.012.79.44.016.73.8
large gap27.37.810.09.530.26.327.14.5
very large gap.0.0.0.03.82.62.11.5
total100.0.100.0.100.0.100.0.
Southwestern Alpsno gap17.23.812.56.716.82.616.62.0
small gap25.04.324.98.831.13.228.82.5
medium gap22.94.224.98.820.62.821.62.3
large gap34.04.737.79.929.23.131.22.5
very large gap1.01.0.0.02.41.11.80.7
total100.0.100.0.100.0.100.0.
Southeastern Alpsno gap15.02.527.213.412.82.314.21.7
small gap23.73.018.111.625.53.024.42.1
medium gap22.32.918.111.624.53.023.32.1
large gap36.93.436.614.634.43.335.62.3
very large gap2.01.0.0.02.81.12.40.7
total100.0.100.0.100.0.100.0.
Southern Alpsno gap30.04.530.38.029.42.629.62.2
small gap21.24.030.38.036.82.832.62.3
medium gap18.63.915.16.213.42.014.81.7
large gap29.14.524.37.519.72.322.32.0
very large gap1.01.0.0.00.70.50.70.4
total100.0.100.0.100.0.100.0.
Switzerlandno gap31.31.129.84.224.01.228.30.8
small gap32.61.125.54.033.51.332.70.8
medium gap15.60.819.13.617.61.016.50.6
large gap19.50.924.73.923.41.121.20.7
very large gap1.10.20.80.81.50.31.20.2
total100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151300/137680
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
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 gap38.32.335.11.928.12.115.43.913.52.629.94.431.11.1
small gap36.92.338.51.927.72.122.04.524.43.321.23.932.61.1
medium gap11.51.513.71.317.51.825.44.722.13.219.83.915.70.8
large gap12.61.611.01.226.42.136.15.237.53.728.04.419.40.9
very large gap0.70.41.70.50.20.21.21.22.41.21.01.01.10.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap53.813.8.0.030.94.37.33.22.32.212.35.119.12.3
small gap30.912.8.0.025.74.133.85.718.25.836.57.528.32.7
medium gap7.77.4.0.020.33.823.55.129.56.924.36.722.52.5
large gap7.77.4.0.019.53.733.95.845.57.526.96.927.62.7
very large gap.0.0.0.03.51.71.51.54.53.1.0.02.50.9
total100.0..0.0100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap39.05.035.55.523.02.019.03.313.53.031.92.725.81.3
small gap35.84.950.05.733.02.228.83.826.13.836.12.833.81.4
medium gap12.63.45.32.619.01.819.73.323.93.712.11.916.51.1
large gap12.63.49.23.323.92.029.63.834.34.119.22.322.71.2
very large gap.0.0.0.01.10.52.91.42.21.30.70.51.20.3
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap38.82.135.21.826.21.415.32.112.11.729.62.228.30.8
small gap36.62.139.71.829.81.428.02.624.32.332.62.232.70.8
medium gap11.61.412.91.218.51.222.22.423.72.315.11.716.50.6
large gap12.51.410.81.124.51.432.52.737.32.622.02.021.20.7
very large gap0.60.31.50.51.00.32.00.82.60.90.70.41.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151301/137681
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
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 gap38.012.4.0.044.416.838.89.7
small gap55.812.5.0.022.214.142.19.8
medium gap.0.0100.0.22.214.111.56.4
large gap6.26.1.0.011.110.77.75.3
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
BEno gap29.22.726.16.823.43.126.82.0
small gap37.22.923.96.638.03.636.42.1
medium gap17.92.326.16.813.02.516.81.7
large gap15.02.116.85.825.03.218.81.7
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 gap31.75.633.327.320.46.127.44.1
small gap24.75.2.0.029.66.925.94.1
medium gap23.35.166.727.327.36.725.94.1
large gap18.94.7.0.022.86.319.93.7
very large gap1.51.4.0.0.0.00.90.9
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 gap25.69.927.513.635.311.729.66.7
small gap15.98.526.713.335.311.725.56.4
medium gap31.910.818.311.85.95.819.35.8
large gap26.610.227.513.611.87.921.46.0
very large gap.0.0.0.011.87.94.33.0
total100.0.100.0.100.0.100.0.
GRno gap15.72.49.43.615.62.414.91.6
small gap23.12.818.74.930.23.125.61.9
medium gap22.32.826.55.521.32.722.41.8
large gap37.13.242.36.230.73.134.92.1
very large gap1.80.93.12.22.21.02.20.6
total100.0.100.0.100.0.100.0.
JUno gap37.96.4100.0.21.47.834.15.1
small gap36.36.3.0.060.79.243.35.3
medium gap10.24.0.0.07.14.99.03.1
large gap13.84.6.0.010.75.912.53.5
very large gap1.71.7.0.0.0.01.11.1
total100.0.100.0.100.0.100.0.
LUno gap24.54.2100.0.15.08.024.23.8
small gap38.44.7.0.040.011.038.14.3
medium gap19.53.8.0.030.010.320.83.6
large gap14.83.4.0.015.08.014.63.1
very large gap2.81.6.0.0.0.02.31.3
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 gap33.09.129.317.414.37.725.35.9
small gap15.06.914.713.614.37.714.74.8
medium gap15.06.914.713.628.69.920.25.5
large gap37.19.441.418.542.910.939.86.7
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
SGno gap33.85.720.012.733.75.332.93.7
small gap22.15.050.015.833.75.329.83.6
medium gap17.64.6.0.015.04.015.22.9
large gap25.05.330.014.517.54.321.53.3
very large gap1.51.5.0.0.0.00.60.6
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 gap50.65.7.0.083.315.352.95.4
small gap31.65.3.0.0.0.029.45.0
medium gap10.13.4.0.016.715.310.63.4
large gap7.63.0.0.0.0.07.12.8
very large gap.0.0.0.0.0.0.0.0
total100.0..0.0100.0.100.0.
SZno gap29.87.528.617.243.38.235.85.3
small gap24.37.1.0.024.37.122.24.6
medium gap8.14.542.918.810.85.112.33.7
large gap37.88.014.313.318.96.527.25.0
very large gap.0.014.313.32.72.72.51.7
total100.0.100.0.100.0.100.0.
TGno gap40.06.2.0.060.015.642.75.8
small gap36.16.2.0.020.012.733.85.6
medium gap6.43.1.0.010.09.56.93.0
large gap16.04.7.0.010.09.515.24.2
very large gap1.61.6.0.0.0.01.41.4
total100.0..0.0100.0.100.0.
TIno gap32.55.314.96.934.73.132.72.5
small gap22.44.740.79.535.63.132.92.5
medium gap17.74.322.28.011.72.113.91.9
large gap26.14.922.28.017.52.519.92.1
very large gap1.31.3.0.00.40.40.60.4
total100.0.100.0.100.0.100.0.
URno gap16.27.530.014.629.010.023.45.7
small gap27.48.950.015.918.98.628.26.0
medium gap12.36.710.09.528.49.917.95.2
large gap44.110.010.09.623.79.330.56.2
very large gap.0.0.0.0.0.0.0.0
total100.0.100.0.100.0.100.0.
VDno gap31.33.245.515.019.65.929.82.8
small gap36.53.327.313.450.07.438.53.0
medium gap13.52.49.18.715.35.313.62.1
large gap17.22.618.211.615.15.316.92.3
very large gap1.40.8.0.0.0.01.10.7
total100.0.100.0.100.0.100.0.
VSno gap17.23.89.63.419.43.116.62.0
small gap25.04.332.85.529.33.628.82.5
medium gap22.94.224.65.019.43.121.62.3
large gap34.04.731.65.429.43.631.22.5
very large gap1.01.01.41.42.51.31.80.7
total100.0.100.0.100.0.100.0.
ZGno gap48.321.0.0.022.214.332.412.4
small gap51.721.0.0.044.417.147.313.3
medium gap.0.0.0.011.110.86.86.8
large gap.0.0.0.022.214.313.59.2
very large gap.0.0.0.0.0.0.0.0
total100.0..0.0100.0.100.0.
ZHno gap32.93.9.0.0.0.032.03.9
small gap41.94.1.0.050.025.142.14.1
medium gap15.43.0.0.0.0.015.02.9
large gap9.12.4.0.050.025.110.22.5
very large gap0.70.7.0.0.0.00.70.7
total100.0..0.0100.0.100.0.
Switzerlandno gap31.41.119.22.425.91.328.40.8
small gap32.61.128.22.733.81.432.70.8
medium gap15.60.822.52.516.51.116.50.6
large gap19.40.927.62.722.61.221.20.7
very large gap1.10.22.50.91.20.31.20.2
total100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151302/137682
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
grid: grid NFI4 2009-2013
state 2009/13
production region
JuraPlateauPre-AlpsAlpsSouthern AlpsSwitzerland
avalanches SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %±
n/ano gap40.72.334.41.928.22.618.81.930.04.531.21.1
small gap36.32.338.62.030.62.724.72.121.24.032.71.1
medium gap10.61.513.61.418.52.221.32.018.63.915.70.8
large gap11.71.511.51.322.52.434.02.329.14.519.40.9
very large gap0.70.41.80.50.30.31.20.51.01.01.10.2
total100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap53.913.8.0.040.68.113.72.512.95.419.22.4
small gap30.712.8.0.013.55.629.53.335.87.728.32.7
medium gap7.77.4.0.024.37.123.13.123.06.722.52.5
large gap7.77.4.0.021.66.830.13.328.27.227.62.7
very large gap.0.0.0.0.0.03.71.4.0.02.50.9
total100.0..0.0100.0.100.0.100.0.100.0.
outside perimeterno gap37.85.134.06.723.22.520.61.831.72.725.81.3
small gap36.75.154.07.136.82.927.92.036.22.833.81.4
medium gap13.33.64.02.819.32.419.41.812.31.916.51.1
large gap12.23.58.03.820.02.430.02.119.12.322.61.2
very large gap.0.0.0.00.70.52.10.70.70.51.20.3
total100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap40.52.134.41.926.61.818.71.229.62.228.30.8
small gap36.22.039.81.932.41.926.91.332.62.332.70.8
medium gap11.01.312.91.319.21.620.81.214.81.716.50.6
large gap11.71.411.21.221.31.731.61.422.32.021.20.7
very large gap0.50.31.70.50.50.32.00.40.70.41.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151303/137683
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
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 gap37.11.524.42.631.83.617.23.815.02.530.04.531.11.1
small gap37.61.531.82.924.53.325.04.323.73.021.24.032.71.1
medium gap12.41.021.02.514.72.722.94.222.32.918.63.915.70.8
large gap11.61.022.82.628.43.534.04.736.93.429.14.519.40.9
very large gap1.30.4.0.00.60.61.01.02.01.01.01.01.10.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap53.813.830.56.025.56.69.63.49.64.112.95.419.12.4
small gap30.812.823.75.532.67.232.85.517.35.235.87.728.32.7
medium gap7.77.423.75.516.25.624.65.026.96.223.06.722.62.5
large gap7.77.417.04.923.36.531.65.442.36.928.27.227.62.7
very large gap.0.05.12.92.32.31.41.43.82.7.0.02.50.9
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap36.44.118.92.533.53.519.43.114.72.731.72.725.71.3
small gap42.94.235.43.030.63.529.33.627.53.436.22.833.91.4
medium gap10.02.519.72.515.02.719.43.123.43.212.31.916.51.1
large gap10.72.625.62.719.23.029.43.632.23.619.12.322.71.2
very large gap.0.00.40.41.71.02.51.32.31.20.70.51.20.3
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap37.21.422.61.731.92.416.62.014.21.729.62.228.20.8
small gap38.21.432.61.928.22.328.82.524.42.132.62.332.70.8
medium gap12.00.920.71.715.01.821.62.323.32.114.81.716.60.6
large gap11.50.923.41.823.62.231.22.535.62.322.32.021.20.7
very large gap1.20.30.70.31.30.61.80.72.40.70.70.41.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 29.12.2015 #151304/137684
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