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NFI4
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: 1.4 x 1.4 km grid
state2009/17
canton
AGAIARBEBL/BSFRGEGLGRJULUNENWOWSGSHSOSZTGTIURVDVSZGZH Switzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %±
n/ano gap46.03.353.114.337.58.631.42.152.55.831.84.163.216.128.97.315.91.841.64.725.43.332.64.221.69.925.96.128.24.145.46.749.94.123.34.838.94.929.43.716.56.331.82.316.52.629.111.531.72.931.20.8
small gap34.33.116.310.752.49.233.52.233.75.532.64.210.510.525.57.325.62.233.04.437.23.745.64.538.511.915.34.830.64.240.46.634.43.935.75.634.64.626.03.622.47.136.32.426.83.147.412.245.83.233.40.8
medium gap8.81.98.38.10.0.17.71.86.02.619.13.610.510.529.37.521.92.114.03.318.33.015.63.310.07.019.65.616.23.48.83.88.52.310.53.59.93.217.73.123.67.112.31.721.62.94.24.212.02.115.30.6
large gap9.71.922.311.85.53.815.91.77.83.015.63.115.711.416.36.235.02.410.42.817.32.95.02.129.811.437.36.722.63.85.43.16.32.027.95.115.83.625.63.537.58.117.71.934.63.419.28.910.01.918.80.7
very large gap1.20.70.0.4.64.61.50.60.0.0.90.90.0.0.0.1.60.60.90.91.81.01.11.10.0.1.91.92.41.40.0.0.80.82.61.90.70.71.30.90.0.1.90.70.50.50.0.0.50.51.30.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap......35.510.041.134.2....23.512.116.46.216.515.1..0.0.100.0.0.0.10.610.1..46.525.226.723.0..39.97.626.311.4100.0.18.96.4....27.63.2
small gap......17.57.90.0.....15.610.333.27.932.919.1..100.0.0.0.59.134.253.917.6..0.0.26.723.0..26.36.828.711.00.0.23.87.0....26.33.1
medium gap......34.59.958.934.2....35.414.225.17.333.019.3..0.0.0.0.0.0.35.516.8..53.525.219.918.2..14.15.313.79.10.0.22.06.9....23.83.1
large gap......12.56.80.0.....25.412.922.47.017.615.8..0.0.0.0.40.934.20.0...0.0.0.0...19.86.331.411.80.0.32.77.8....20.72.9
very large gap......0.0.0.0.....0.0.2.82.80.0...0.0.0.0.0.0.0.0...0.0.26.723.0..0.0.0.0.0.0.2.62.6....1.60.9
total......100.0.100.0.....100.0.100.0.100.0...100.0.100.0.100.0.100.0...100.0.100.0...100.0.100.0.100.0.100.0.....100.0.
outside perimeterno gap55.116.722.511.237.612.424.22.251.112.327.55.2..32.77.915.71.635.06.525.77.137.311.146.212.724.66.229.73.850.036.154.815.431.55.746.413.735.12.222.87.332.34.614.91.812.07.638.717.525.30.9
small gap33.615.857.012.831.911.238.92.511.88.029.15.3..39.18.226.02.053.86.837.48.049.811.320.69.413.95.134.63.950.036.122.211.628.25.629.712.834.72.336.68.742.94.934.62.560.613.133.916.433.71.0
medium gap11.310.77.57.319.710.616.21.937.112.021.34.6..8.14.520.31.85.63.115.86.08.65.813.99.229.56.813.32.80.0.11.510.712.94.09.18.714.51.730.58.015.53.619.72.113.19.10.0.17.10.8
large gap0.0.12.99.010.77.318.92.00.0.20.84.7..15.05.735.32.15.63.118.56.44.34.319.49.932.06.522.43.40.0.11.510.724.25.314.810.015.31.710.15.69.32.828.62.314.39.527.416.322.40.8
very large gap0.0.0.0.0.0.1.80.70.0.1.31.3..5.03.52.70.70.0.2.62.60.0.0.0.0.0.0.0.0.0.0.0.3.32.30.0.0.40.30.0.0.0.2.20.80.0.0.0.1.50.2
total100.0.100.0.100.0.100.0.100.0.100.0...100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap46.43.237.19.437.57.228.41.552.05.230.33.263.216.129.84.915.81.238.73.725.53.032.93.934.38.024.84.228.52.745.66.650.13.927.03.639.84.634.11.820.74.432.32.115.61.522.07.731.92.928.70.6
small gap34.23.137.79.245.57.635.41.629.14.731.43.310.510.530.05.026.11.439.43.637.23.346.64.229.67.915.43.533.42.840.66.532.73.732.13.934.14.332.21.928.95.037.42.231.41.952.98.845.53.133.30.6
medium gap8.81.87.95.46.64.017.51.312.63.519.82.910.510.521.04.521.21.312.12.517.92.714.62.911.65.724.04.315.22.28.63.710.02.411.82.69.83.015.21.424.34.712.91.520.51.67.94.411.62.116.30.5
large gap9.41.817.47.47.23.517.11.36.32.417.42.515.711.417.04.134.71.59.12.217.52.64.91.924.57.434.94.521.82.45.23.06.42.025.43.615.73.418.01.526.14.815.81.630.91.917.26.710.51.920.30.5
very large gap1.20.70.0.3.13.11.60.40.0.1.00.70.0.2.11.52.20.50.60.61.91.01.01.00.0.1.01.01.00.60.0.0.80.83.61.60.60.60.60.30.0.1.50.51.70.50.0.0.50.51.40.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #875949/342281
NFI4
number of forest plots
rockfall SilvaProtect · area of largest gap (aerial photo, 5 classes)
unit of reference: canton
unit: %
unit of evaluation: accessible forest NFI3/NFI4
grid: 1.4 x 1.4 km grid
state2009/17
canton
AGAIARBEBL/BSFRGEGLGRJULUNENWOWSGSHSOSZTGTIURVDVSZGZH Switzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %±
n/ano gap46.03.353.114.333.88.830.32.151.45.930.94.163.216.126.46.315.71.742.04.726.03.431.34.222.610.324.46.027.74.144.56.849.14.122.34.839.44.931.13.523.26.231.52.314.92.524.111.130.82.930.40.8
small gap34.33.116.310.755.59.633.42.234.55.633.14.310.510.531.96.929.02.133.34.436.63.646.54.635.712.117.65.131.64.241.06.735.04.036.15.633.84.626.13.325.56.436.32.427.73.250.812.446.63.234.00.8
medium gap8.81.98.38.10.0.17.61.86.12.719.33.610.510.524.76.322.42.013.43.218.33.015.93.310.57.320.05.717.13.59.03.98.72.310.63.610.03.219.43.020.35.912.41.723.03.04.54.512.32.215.70.6
large gap9.71.922.311.85.84.017.11.78.03.115.83.115.711.417.05.531.82.210.42.917.32.95.12.131.211.936.16.721.23.75.53.16.42.128.25.216.03.622.83.231.06.717.81.933.93.420.69.59.81.918.70.6
very large gap1.20.70.0.4.94.91.50.60.0.0.90.90.0.0.0.1.10.50.90.91.81.01.21.20.0.1.91.92.41.40.0.0.80.82.71.90.70.70.60.60.0.1.90.70.50.50.0.0.50.51.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap......35.510.041.134.2....23.512.117.46.516.515.1..0.0.100.0.0.0.12.311.7..46.525.233.327.7..39.97.626.311.4100.0.16.16.0....27.73.2
small gap......17.57.90.0.....15.610.332.38.032.919.1..100.0.0.0.59.134.262.817.8..0.0.33.327.7..23.96.628.711.00.0.26.77.3....26.43.2
medium gap......34.59.958.934.2....35.414.226.67.633.019.3..0.0.0.0.0.0.24.915.7..53.525.20.0...14.15.313.79.10.0.22.06.9....23.23.1
large gap......12.56.80.0.....25.412.920.77.017.615.8..0.0.0.0.40.934.20.0...0.0.0.0...22.16.531.411.80.0.32.67.7....21.12.9
very large gap......0.0.0.0.....0.0.3.02.90.0...0.0.0.0.0.0.0.0...0.0.33.327.7..0.0.0.0.0.0.2.62.6....1.60.9
total......100.0.100.0.....100.0.100.0.100.0...100.0.100.0.100.0.100.0...100.0.100.0...100.0.100.0.100.0.100.0.....100.0.
outside perimeterno gap55.116.722.511.237.612.424.42.251.112.327.15.2..30.57.815.41.633.86.525.77.137.311.146.212.724.06.529.33.850.036.154.815.430.25.746.413.735.22.223.27.031.64.614.71.812.07.638.717.525.30.9
small gap33.615.857.012.831.911.239.02.511.88.030.15.4..40.48.326.32.054.86.837.48.049.811.320.69.415.25.535.13.950.036.122.211.628.75.729.712.834.62.235.48.143.34.935.02.560.613.133.916.434.01.0
medium gap11.310.77.57.319.710.616.01.937.112.021.04.6..8.44.720.41.85.73.215.86.08.65.813.99.232.27.212.92.80.0.11.510.713.14.19.18.714.31.627.17.315.73.619.92.113.19.10.0.17.00.8
large gap0.0.12.99.010.77.318.72.00.0.20.54.6..15.55.935.22.15.73.218.56.44.34.319.49.928.66.622.73.40.0.11.510.724.65.414.810.015.51.714.36.09.42.828.42.314.39.527.416.322.30.8
very large gap0.0.0.0.0.0.1.90.70.0.1.31.3..5.13.62.70.70.0.2.62.60.0.0.0.0.0.0.0.0.0.0.0.3.42.30.0.0.40.30.0.0.0.1.90.70.0.0.0.1.40.2
total100.0.100.0.100.0.100.0.100.0.100.0...100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap46.43.237.19.435.27.327.91.551.15.329.53.263.216.127.64.515.61.138.63.726.03.031.83.935.18.123.84.328.22.744.76.749.43.926.13.640.24.634.51.823.74.332.02.114.91.418.97.331.12.928.30.6
small gap34.23.137.79.247.27.835.41.629.74.832.13.410.510.533.04.927.81.439.93.736.73.347.44.228.07.917.23.834.32.941.36.633.13.732.84.033.34.331.91.829.64.637.52.232.01.955.08.746.13.233.70.6
medium gap8.81.87.95.46.94.117.41.312.83.619.92.910.510.519.94.221.51.311.72.517.92.714.83.011.85.825.24.515.12.28.73.810.12.511.52.79.93.015.51.421.74.113.01.521.11.78.24.611.92.116.50.5
large gap9.41.817.47.47.53.617.71.36.42.517.42.515.711.417.53.933.11.59.22.217.52.64.91.925.17.532.84.621.42.45.33.06.52.026.03.615.93.417.71.425.14.415.91.630.51.917.97.010.41.920.20.5
very large gap1.20.70.0.3.23.21.60.40.0.1.00.70.0.1.91.42.00.40.60.61.91.01.01.00.0.1.01.01.10.60.0.0.80.83.71.60.60.60.40.20.0.1.50.61.50.50.0.0.50.51.30.1
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #875950/342282
NFI4
number of forest plots
rockfall SilvaProtect · area of largest gap (aerial photo, 5 classes)
unit of reference: canton
unit: %
unit of evaluation: accessible forest
grid: 1.4 x 1.4 km grid
state2009/17
canton
AGAIARBEBL/BSFRGEGLGRJULUNENWOWSGSHSOSZTGTIURVDVSZGZH Switzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %±
n/ano gap46.03.353.114.337.58.632.42.152.55.831.84.163.216.129.66.218.61.741.64.725.93.332.64.221.69.926.76.030.74.045.46.749.94.124.34.938.94.930.93.329.06.131.92.318.62.629.111.531.72.931.60.8
small gap34.33.116.310.752.49.232.82.133.75.532.64.210.510.528.86.327.92.033.04.436.93.645.64.538.511.916.64.930.64.040.46.634.43.935.25.534.64.627.33.225.45.936.32.426.72.947.412.245.83.233.30.8
medium gap8.81.98.38.10.0.17.11.76.02.619.13.610.510.526.36.121.41.814.03.318.23.015.63.310.07.018.95.516.13.28.83.88.52.310.43.59.93.219.12.817.35.112.21.721.32.74.24.212.02.115.40.6
large gap9.71.922.311.85.53.816.21.77.83.015.63.115.711.415.35.130.62.110.42.817.22.95.02.129.811.436.06.520.53.55.43.16.32.027.55.015.83.621.73.028.36.117.71.932.93.119.28.910.01.918.40.6
very large gap1.20.70.0.4.64.61.40.50.0.0.90.90.0.0.0.1.40.50.90.91.81.01.11.10.0.1.81.82.21.20.0.0.80.82.61.80.70.71.00.70.0.1.90.70.50.50.0.0.50.51.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap......35.510.041.134.2....23.512.116.06.016.515.1..0.0.100.0.0.0.10.610.1..46.525.226.723.0..39.07.526.311.4100.0.18.36.3....27.23.2
small gap......17.57.90.0.....15.610.332.37.732.919.1..100.0.0.0.59.134.253.917.6..0.0.26.723.0..25.76.728.711.00.0.26.07.1....26.53.1
medium gap......34.59.958.934.2....35.414.224.47.133.019.3..0.0.0.0.0.0.35.516.8..53.525.219.918.2..13.75.213.79.10.0.21.46.7....23.43.0
large gap......12.56.80.0.....25.412.924.57.117.615.8..0.0.0.0.40.934.20.0...0.0.0.0...21.66.431.411.80.0.31.77.6....21.42.9
very large gap......0.0.0.0.....0.0.2.72.70.0...0.0.0.0.0.0.0.0...0.0.26.723.0..0.0.0.0.0.0.2.52.5....1.50.9
total......100.0.100.0.....100.0.100.0.100.0...100.0.100.0.100.0.100.0...100.0.100.0...100.0.100.0.100.0.100.0.....100.0.
outside perimeterno gap55.116.722.511.237.612.424.22.251.112.327.15.2..32.77.916.71.635.06.525.77.137.311.146.212.726.16.329.73.850.036.154.815.431.55.746.413.735.02.223.27.032.34.614.81.812.07.638.717.525.60.9
small gap33.615.857.012.831.911.238.92.511.88.030.15.4..39.18.226.01.953.86.837.48.049.811.320.69.413.65.034.63.950.036.122.211.628.25.629.712.835.02.235.48.142.94.934.72.560.613.133.916.433.80.9
medium gap11.310.77.57.319.710.616.21.937.112.021.04.6..8.14.520.01.85.63.115.86.08.65.813.99.228.96.613.32.80.0.11.510.712.94.09.18.714.21.627.17.315.53.619.72.113.19.10.0.16.90.8
large gap0.0.12.99.010.77.318.92.00.0.20.54.6..15.05.734.62.15.63.118.56.44.34.319.49.931.36.422.43.40.0.11.510.724.25.314.810.015.41.614.36.09.32.828.62.314.39.527.416.322.20.8
very large gap0.0.0.0.0.0.1.80.70.0.1.31.3..5.03.52.60.70.0.2.62.60.0.0.0.0.0.0.0.0.0.0.0.3.32.30.0.0.40.30.0.0.0.2.20.80.0.0.0.1.50.2
total100.0.100.0.100.0.100.0.100.0.100.0...100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap46.43.237.19.437.57.229.01.552.05.230.23.263.216.130.04.517.61.238.73.725.83.032.93.934.38.026.04.229.62.745.66.650.13.927.53.639.84.634.21.726.64.232.42.116.41.522.07.731.92.929.10.6
small gap34.23.137.79.245.57.635.01.629.14.731.83.310.510.531.04.627.11.439.43.637.03.346.64.229.67.915.93.533.32.740.66.532.73.731.93.934.14.332.41.829.24.437.52.231.31.852.98.845.53.133.30.6
medium gap8.81.87.95.46.64.017.11.312.63.519.82.910.510.520.84.120.91.312.12.517.82.714.62.911.65.723.34.215.22.18.63.710.02.411.72.69.83.015.51.320.03.812.81.520.41.67.94.411.62.116.30.5
large gap9.41.817.47.47.23.517.21.26.32.417.32.515.711.416.43.732.41.49.12.217.42.64.91.924.57.433.94.420.92.35.23.06.42.025.33.615.73.417.41.424.14.215.91.630.31.817.26.710.51.920.00.5
very large gap1.20.70.0.3.13.11.60.40.0.1.00.70.0.1.81.32.10.40.60.61.90.91.01.00.0.0.90.91.00.60.0.0.80.83.61.60.60.60.50.30.0.1.50.51.60.50.0.0.50.51.30.1
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #875951/342283
NFI4
number of forest plots
rockfall SilvaProtect · area of largest gap (aerial photo, 5 classes)
unit of reference: canton
unit: %
unit of evaluation: forest NFI3/NFI4
grid: 1.4 x 1.4 km grid
state2009/17
canton
AGAIARBEBL/BSFRGEGLGRJULUNENWOWSGSHSOSZTGTIURVDVSZGZH Switzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %±
n/an/a0.0.0.0.0.0.4.10.91.51.53.01.55.04.75.43.03.20.80.0.1.71.00.0.4.03.90.0.1.61.10.0.0.0.2.71.90.0.15.42.513.74.61.50.68.21.80.0.0.0.3.20.3
no gap46.03.353.114.333.88.829.42.150.65.829.94.060.115.624.96.015.21.642.04.725.63.331.34.221.710.024.46.027.04.044.56.849.14.121.74.739.44.925.83.021.45.531.02.313.72.324.111.130.82.929.50.7
small gap34.33.116.310.755.59.631.92.134.05.532.14.210.010.030.26.628.22.133.34.435.93.646.54.634.311.717.65.131.74.241.06.735.04.035.25.533.84.623.12.921.55.635.72.425.42.950.812.446.63.232.90.8
medium gap8.81.98.38.10.0.16.81.76.02.618.83.510.010.023.46.021.61.913.43.218.02.915.93.310.17.120.05.716.73.49.03.98.72.310.43.510.03.216.22.517.25.012.31.721.22.84.54.512.32.215.20.6
large gap9.71.922.311.85.84.016.41.77.93.015.33.015.010.916.15.330.82.110.42.917.02.85.12.130.011.436.16.720.73.75.53.16.42.127.55.016.03.619.02.726.25.917.51.931.13.120.69.59.81.918.10.6
very large gap1.20.70.0.4.94.91.40.50.0.0.90.90.0.0.0.1.10.50.90.91.81.01.21.20.0.1.91.92.41.40.0.0.80.82.61.80.70.70.40.40.0.1.90.70.50.50.0.0.50.51.10.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimetern/a......0.0.0.0.....7.37.25.23.60.0...0.0.0.0.0.0.30.114.4..0.0.0.0...2.22.216.08.70.0.5.03.5....5.91.7
no gap......35.510.041.134.2....21.811.415.65.916.515.1..0.0.100.0.0.0.7.47.2..46.525.226.723.0..38.17.422.19.8100.0.15.35.7....25.43.0
small gap......17.57.90.0.....14.59.631.57.632.919.1..100.0.0.0.59.134.237.714.8..0.0.26.723.0..25.16.624.19.50.0.25.47.0....25.13.0
medium gap......34.59.958.934.2....32.813.423.86.933.019.3..0.0.0.0.0.0.24.812.7..53.525.219.918.2..13.45.111.57.70.0.20.96.6....22.32.9
large gap......12.56.80.0.....23.612.121.26.717.615.8..0.0.0.0.40.934.20.0...0.0.0.0...21.26.326.410.30.0.31.07.4....19.82.8
very large gap......0.0.0.0.....0.0.2.72.60.0...0.0.0.0.0.0.0.0...0.0.26.723.0..0.0.0.0.0.0.2.52.4....1.50.8
total......100.0.100.0.....100.0.100.0.100.0...100.0.100.0.100.0.100.0...100.0.100.0...100.0.100.0.100.0.100.0.....100.0.
outside perimetern/a0.0.0.0.0.0.1.60.60.0.0.0...10.75.03.50.80.0.2.52.54.14.10.0.1.51.54.81.70.0.0.0.4.32.50.0.4.71.02.82.82.71.61.60.66.76.70.0.3.00.3
no gap55.116.722.511.237.612.423.92.251.112.327.15.2..29.27.215.01.633.86.525.06.935.710.746.212.725.76.528.33.650.036.154.815.430.15.546.413.733.52.122.56.831.44.514.71.811.27.138.717.524.70.8
small gap33.615.857.012.831.911.238.32.511.88.030.15.4..34.97.625.51.954.86.836.57.847.811.020.69.414.55.332.93.850.036.122.211.627.05.429.712.833.12.134.47.941.74.834.42.456.613.033.916.432.90.9
medium gap11.310.77.57.319.710.615.91.937.112.021.04.6..7.34.119.61.75.73.215.45.88.25.613.99.230.97.012.62.70.0.11.510.712.33.99.18.713.61.526.37.115.13.519.52.012.38.50.0.16.50.7
large gap0.0.12.99.010.77.318.62.00.0.20.54.6..13.45.133.92.15.73.218.16.34.14.119.49.927.46.421.33.20.0.11.510.723.15.114.810.014.71.613.95.89.12.728.02.313.39.027.416.321.50.8
very large gap0.0.0.0.0.0.1.80.70.0.1.31.3..4.43.12.60.70.0.2.52.50.0.0.0.0.0.0.0.0.0.0.0.3.22.20.0.0.40.30.0.0.0.1.90.70.0.0.0.1.40.2
total100.0.100.0.100.0.100.0.100.0.100.0...100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totaln/a0.0.0.0.0.0.2.90.61.21.22.01.05.04.77.72.73.40.60.0.1.90.90.60.62.12.10.70.74.51.20.0.0.0.3.41.50.0.7.61.010.52.91.80.64.10.83.03.00.0.3.20.2
no gap46.43.237.19.435.27.327.21.550.55.228.93.160.115.626.34.315.11.138.63.725.53.031.63.934.48.024.64.226.92.644.76.749.43.925.63.540.24.631.61.721.93.931.52.114.41.418.37.131.12.927.40.5
small gap34.23.137.79.247.27.834.31.629.34.831.43.310.010.030.14.627.01.439.93.736.03.347.14.227.47.816.93.732.62.741.36.633.13.731.23.833.34.329.91.726.24.236.82.230.71.853.48.746.13.232.70.6
medium gap8.81.87.95.46.94.116.91.312.73.519.52.810.010.018.23.820.71.311.72.517.52.614.83.011.65.724.74.414.92.18.73.810.12.511.52.69.93.014.31.319.23.712.81.520.11.68.04.511.92.116.00.5
large gap9.41.817.47.47.53.617.21.26.32.517.12.515.010.916.03.632.01.49.22.217.22.64.91.924.57.432.24.520.22.35.33.06.52.024.73.515.93.416.31.322.24.015.61.629.31.817.46.810.41.919.50.5
very large gap1.20.70.0.3.23.21.60.40.0.1.00.70.0.1.71.21.90.40.60.61.90.91.01.00.0.1.01.01.00.60.0.0.80.83.61.60.60.60.40.20.0.1.50.51.40.50.0.0.50.51.20.1
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #875952/342284
NFI4
number of forest plots
rockfall SilvaProtect · area of largest gap (aerial photo, 5 classes)
unit of reference: protection forest region
unit: %
unit of evaluation: accessible forest without shrub forest NFI1/NFI2/NFI3/NFI4
grid: 1.4 x 1.4 km grid
state2009/17
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern Alps Switzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %±
n/ano gap38.01.121.02.023.32.712.02.910.71.937.24.830.80.8
small gap38.31.133.22.434.73.031.74.230.12.927.74.535.90.9
medium gap11.40.821.22.016.02.323.93.923.42.715.63.614.90.7
large gap11.00.723.72.123.82.731.64.234.63.019.53.917.10.7
very large gap1.40.31.00.52.10.90.90.91.20.70.0.1.30.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap19.68.859.010.726.27.617.16.319.410.138.37.030.63.5
small gap25.79.913.97.528.97.725.37.328.111.930.76.626.43.3
medium gap44.911.113.27.124.47.520.26.839.412.714.55.123.03.2
large gap9.76.613.97.517.86.634.78.113.18.716.55.419.03.0
very large gap0.0.0.0.2.72.72.82.70.0.0.0.1.10.8
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap41.33.022.01.928.62.615.01.911.61.733.62.225.00.9
small gap40.33.036.72.237.02.835.32.625.42.434.52.234.81.0
medium gap9.51.819.51.814.82.120.92.222.82.313.31.617.10.8
large gap8.51.720.21.818.32.227.32.436.82.617.71.721.60.9
very large gap0.40.41.60.61.40.71.50.73.41.00.80.41.50.3
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap38.21.122.41.426.21.814.41.611.41.334.51.928.40.6
small gap38.41.134.61.635.52.033.72.127.41.833.11.935.10.7
medium gap11.50.720.11.315.91.521.61.823.41.713.81.416.10.5
large gap10.60.721.61.320.61.728.92.035.31.917.91.519.00.5
very large gap1.30.21.30.41.70.51.40.52.40.60.60.31.40.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #875953/342285
NFI4
number of forest plots
rockfall SilvaProtect · area of largest gap (aerial photo, 5 classes)
unit of reference: protection forest region
unit: %
unit of evaluation: accessible forest without shrub forest NFI3/NFI4
grid: 1.4 x 1.4 km grid
state2009/17
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern Alps Switzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %±
n/ano gap38.21.122.12.024.82.513.32.612.01.829.53.630.30.8
small gap37.71.131.32.233.32.827.33.427.42.522.93.334.10.8
medium gap11.50.721.61.916.42.222.43.222.82.419.03.115.50.6
large gap11.30.724.12.023.82.536.43.736.52.728.13.518.90.7
very large gap1.40.30.90.41.80.80.60.61.30.60.60.61.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap19.68.856.310.524.17.016.66.220.79.334.16.528.73.3
small gap25.79.913.37.229.27.424.57.222.09.731.06.325.83.2
medium gap44.911.117.27.922.47.022.67.036.411.114.74.823.43.1
large gap9.76.613.37.221.86.933.67.915.68.320.15.420.63.0
very large gap0.0.0.0.2.52.52.72.75.35.20.0.1.50.9
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap41.03.022.71.928.32.514.81.812.81.732.22.024.90.9
small gap40.43.036.22.135.82.734.62.525.42.233.72.034.11.0
medium gap9.81.819.61.714.92.020.12.122.22.114.81.517.30.8
large gap8.41.720.01.719.72.228.62.336.52.518.61.722.20.8
very large gap0.40.41.50.51.30.62.00.73.00.90.70.41.50.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap38.41.023.21.326.51.714.51.512.71.231.71.728.00.6
small gap37.91.033.41.534.31.931.81.926.21.631.21.733.80.6
medium gap11.60.720.51.316.01.520.91.722.81.615.71.316.50.5
large gap10.90.721.71.321.61.631.21.936.01.820.71.420.30.5
very large gap1.20.21.20.31.60.51.60.52.30.60.60.31.40.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #875954/342286
NFI4
number of forest plots
rockfall SilvaProtect · area of largest gap (aerial photo, 5 classes)
unit of reference: protection forest region
unit: %
unit of evaluation: accessible forest without shrub forest
grid: 1.4 x 1.4 km grid
state2009/17
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern Alps Switzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %±
n/ano gap38.41.124.92.028.12.516.52.614.71.928.43.331.20.8
small gap37.51.131.22.131.32.626.83.126.52.424.23.133.50.8
medium gap11.50.720.51.815.72.121.62.921.42.219.82.915.30.6
large gap11.30.722.61.923.22.434.63.435.72.626.63.218.80.7
very large gap1.30.30.80.41.70.70.50.51.70.71.00.71.30.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap19.68.856.310.522.26.618.96.417.88.133.56.428.03.2
small gap25.79.913.37.229.57.223.87.023.59.232.26.326.33.1
medium gap44.911.117.27.925.87.022.06.931.39.914.54.823.43.0
large gap9.76.613.37.220.26.432.77.822.89.019.75.420.82.9
very large gap0.0.0.0.2.32.32.62.64.64.50.0.1.50.8
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap41.13.022.91.828.72.514.91.814.01.732.52.025.20.9
small gap40.53.035.82.135.42.634.62.525.22.233.82.033.91.0
medium gap9.71.819.61.714.82.019.72.121.92.114.51.517.10.8
large gap8.31.720.31.719.92.228.62.336.02.418.51.622.30.8
very large gap0.40.41.50.51.20.62.20.82.90.90.70.41.50.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap38.51.024.51.328.01.715.61.514.41.331.61.628.70.6
small gap37.81.033.11.533.21.831.41.925.81.631.41.633.50.6
medium gap11.60.720.01.215.91.420.51.621.91.515.71.316.30.5
large gap10.90.721.21.221.41.630.91.935.51.720.51.420.30.5
very large gap1.20.21.20.31.50.51.70.52.40.60.70.31.40.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #875955/342287
NFI4
number of forest plots
rockfall SilvaProtect · area of largest gap (aerial photo, 5 classes)
unit of reference: protection forest region
unit: %
unit of evaluation: accessible forest NFI3/NFI4
grid: 1.4 x 1.4 km grid
state2009/17
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern Alps Switzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %±
n/ano gap38.21.123.21.927.12.414.92.514.31.729.83.030.40.8
small gap37.61.131.32.133.32.627.73.230.22.324.72.934.00.8
medium gap11.50.720.71.815.82.023.03.021.72.121.42.715.70.6
large gap11.30.724.01.922.22.333.93.432.62.323.62.818.70.6
very large gap1.40.30.80.41.60.70.50.51.30.60.40.41.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap19.68.856.310.523.56.916.16.019.78.933.56.428.13.3
small gap25.79.913.37.231.17.526.77.320.99.330.56.226.43.2
medium gap44.911.117.27.921.86.822.06.934.610.714.54.822.93.0
large gap9.76.613.37.221.36.732.67.719.98.921.55.521.23.0
very large gap0.0.0.0.2.42.42.62.65.14.90.0.1.50.9
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap41.03.022.71.928.12.514.71.813.51.732.82.025.20.9
small gap40.43.036.32.135.82.635.02.525.62.233.82.034.21.0
medium gap9.81.819.61.714.62.019.92.121.92.114.31.517.00.8
large gap8.41.719.91.720.22.228.42.336.12.418.41.622.20.8
very large gap0.40.41.50.51.30.61.90.72.90.90.70.31.50.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap38.41.023.61.327.41.714.91.414.01.232.11.628.20.6
small gap37.91.033.41.534.31.832.01.927.71.631.21.633.90.6
medium gap11.60.720.11.315.61.421.11.722.11.516.21.316.50.5
large gap10.90.721.71.321.31.530.51.933.91.619.91.320.20.5
very large gap1.20.21.20.31.50.51.50.52.20.50.60.31.30.1
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #875956/342288
NFI4
number of forest plots
rockfall SilvaProtect · area of largest gap (aerial photo, 5 classes)
unit of reference: protection forest region
unit: %
unit of evaluation: accessible forest
grid: 1.4 x 1.4 km grid
state2009/17
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern Alps Switzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %±
n/ano gap38.41.126.21.930.72.418.62.617.11.830.42.931.50.8
small gap37.51.130.72.031.62.426.72.929.22.225.32.833.40.8
medium gap11.50.719.71.815.21.921.32.720.81.921.02.615.40.6
large gap11.30.722.61.821.02.132.93.131.42.222.62.618.40.6
very large gap1.30.30.80.41.40.60.50.51.60.60.80.51.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap19.68.856.310.522.26.618.36.317.07.832.96.327.63.2
small gap25.79.913.37.229.57.226.07.122.48.831.76.226.43.1
medium gap44.911.117.27.925.87.021.46.729.99.514.24.723.13.0
large gap9.76.613.37.220.26.431.77.626.29.221.25.421.52.9
very large gap0.0.0.0.2.32.32.52.54.44.30.0.1.40.8
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap41.13.023.01.828.62.514.81.815.11.832.81.925.50.9
small gap40.53.035.82.135.32.634.72.525.32.234.02.034.00.9
medium gap9.71.819.51.714.62.019.72.121.52.014.21.416.90.7
large gap8.31.720.21.720.22.228.62.335.32.418.31.622.10.8
very large gap0.40.41.50.51.20.62.20.82.90.80.70.31.50.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap38.61.025.31.329.31.716.41.516.21.232.11.529.10.6
small gap37.81.032.91.433.11.731.31.827.21.531.41.633.40.6
medium gap11.60.719.51.215.51.320.41.621.41.416.11.216.20.5
large gap10.90.721.21.220.61.530.31.833.01.619.71.320.00.5
very large gap1.20.21.10.31.40.41.60.52.30.50.70.31.30.1
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #875957/342289
NFI4
number of forest plots
rockfall SilvaProtect · area of largest gap (aerial photo, 5 classes)
unit of reference: protection forest region
unit: %
unit of evaluation: forest NFI3/NFI4
grid: 1.4 x 1.4 km grid
state2009/17
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern Alps Switzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %±
n/an/a0.50.25.11.04.41.18.21.82.60.813.52.13.20.3
no gap38.01.122.31.826.12.313.72.313.81.725.42.629.40.7
small gap37.41.129.52.031.92.525.42.929.52.222.22.533.00.8
medium gap11.40.719.61.815.01.921.22.821.02.018.32.315.20.6
large gap11.20.722.71.821.12.231.13.131.82.320.12.418.10.6
very large gap1.40.30.80.41.50.70.50.51.20.50.40.41.10.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimetern/a0.0.0.0.15.35.35.03.50.0.5.02.85.81.6
no gap19.68.856.310.518.95.715.35.717.88.131.36.025.83.0
small gap25.79.913.37.225.06.325.47.023.59.230.16.025.13.0
medium gap44.911.117.27.921.96.120.96.631.39.913.54.522.02.9
large gap9.76.613.37.217.15.531.07.422.89.020.15.220.02.8
very large gap0.0.0.0.1.91.92.52.44.64.50.0.1.40.8
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimetern/a0.30.32.10.65.11.21.60.63.40.94.50.83.00.3
no gap40.73.022.41.827.22.414.71.813.21.731.31.924.60.8
small gap40.53.035.32.133.62.534.42.424.82.132.41.933.10.9
medium gap9.71.819.21.713.91.919.52.021.12.013.61.416.50.7
large gap8.31.719.51.719.02.128.02.334.72.317.51.521.40.8
very large gap0.40.41.50.51.20.61.90.72.80.80.60.31.40.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totaln/a0.50.23.50.65.40.84.10.82.90.67.20.83.20.2
no gap38.21.023.11.326.21.614.41.413.61.229.61.527.30.5
small gap37.71.032.11.432.21.730.71.827.11.529.31.532.80.6
medium gap11.50.719.31.214.91.320.11.621.31.415.01.215.90.5
large gap10.80.720.91.219.91.429.31.832.91.618.41.219.50.5
very large gap1.20.21.10.31.40.41.40.52.10.50.50.21.30.1
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #875958/342290
NFI4
number of forest plots
rockfall SilvaProtect · area of largest gap (aerial photo, 5 classes)
unit of reference: protection forest region
unit: %
unit of evaluation: forest
grid: 1.4 x 1.4 km grid
state2009/17
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern Alps Switzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %±
n/an/a0.60.26.21.06.31.211.52.03.90.915.72.14.30.3
no gap38.11.124.61.828.82.316.52.316.41.725.62.530.20.7
small gap37.21.128.81.929.62.323.62.628.02.121.32.432.00.7
medium gap11.40.718.41.714.21.818.92.420.01.917.72.214.70.6
large gap11.20.721.21.719.72.029.22.830.22.119.02.317.60.6
very large gap1.30.30.70.41.30.60.40.41.50.60.70.51.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimetern/a0.0.0.0.15.35.37.54.24.44.35.02.86.71.7
no gap19.68.856.310.518.95.717.05.816.37.531.36.025.73.0
small gap25.79.913.37.225.06.324.16.721.58.530.16.024.72.9
medium gap44.911.117.27.921.96.119.86.328.69.213.54.521.52.8
large gap9.76.613.37.217.15.529.47.125.08.920.15.220.12.7
very large gap0.0.0.0.1.91.92.32.34.24.10.0.1.30.8
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimetern/a0.70.52.10.65.11.21.80.73.50.94.70.83.10.3
no gap40.82.922.51.827.22.414.61.814.51.731.21.924.70.8
small gap40.22.935.12.133.52.534.12.424.42.132.41.932.90.9
medium gap9.71.819.11.713.91.919.32.020.82.013.51.416.40.7
large gap8.31.719.81.719.22.128.02.334.02.317.51.521.40.8
very large gap0.40.41.50.51.20.62.20.82.70.80.60.31.40.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totaln/a0.60.24.10.66.30.95.90.93.70.68.10.93.90.2
no gap38.31.024.21.327.51.615.41.415.61.229.51.427.90.5
small gap37.51.031.51.431.01.629.51.726.21.528.91.532.10.6
medium gap11.50.718.71.214.51.319.21.520.61.314.81.115.60.4
large gap10.80.720.41.219.31.428.51.731.81.518.11.219.20.5
very large gap1.20.21.10.31.30.41.50.52.20.50.60.21.30.1
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #875959/342291
NFI4
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: 1.4 x 1.4 km grid
state2009/17
economic region
Western JuraEastern JuraWestern PlateauCentral PlateauEastern PlateauWestern Pre-AlpsCentral Pre-AlpsEastern Pre-AlpsNorthwestern AlpsCentral AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern Alps Switzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %± %± %± %± %± %± %± %± %±
n/ano gap37.92.050.23.638.63.432.82.635.52.126.95.318.52.624.83.422.44.420.45.817.75.712.02.910.71.937.24.830.80.8
small gap37.82.033.23.435.93.438.52.842.02.229.65.235.23.139.13.831.75.126.86.427.07.431.74.230.12.927.74.536.00.9
medium gap12.81.47.71.99.52.115.32.19.81.322.85.121.32.613.32.720.34.416.25.329.57.623.93.923.42.715.63.614.90.7
large gap10.61.37.71.912.72.311.21.811.81.420.64.823.32.620.13.125.74.734.36.825.97.231.64.234.63.019.53.917.00.7
very large gap0.90.41.20.83.31.22.20.90.80.40.0.1.60.82.71.30.0.2.32.20.0.0.90.91.20.70.0.1.30.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap21.79.60.0...0.0...0.0.29.624.030.326.067.711.736.213.115.38.317.16.319.410.138.37.030.13.5
small gap22.59.90.0...100.0...0.0.23.220.630.326.013.38.720.410.539.312.325.37.328.111.930.76.626.83.4
medium gap44.811.8100.0...0.0...100.0.22.720.339.429.26.26.015.410.029.011.320.26.839.412.714.55.123.13.2
large gap10.97.30.0...0.0...0.0.24.521.40.0.12.88.421.211.116.58.834.78.113.18.716.55.418.93.0
very large gap0.0.0.0...0.0...0.0.0.0.0.0.0.0.6.76.50.0.2.82.70.0.0.0.1.10.8
total100.0.100.0...100.0...100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap40.84.155.610.032.99.639.27.141.88.925.13.921.32.830.53.520.83.326.96.725.54.915.01.911.61.733.62.225.00.9
small gap39.14.120.48.163.29.943.87.239.38.829.54.241.53.339.13.735.84.037.67.331.95.335.32.625.42.434.52.234.81.0
medium gap12.32.720.18.10.0.2.12.06.54.525.64.016.02.413.52.619.23.226.46.611.43.720.92.222.82.313.31.617.00.8
large gap7.82.33.93.83.83.812.54.812.45.919.03.619.92.615.62.821.43.49.14.328.85.027.32.436.82.617.71.721.60.9
very large gap0.0.0.0.0.0.2.52.40.0.0.80.81.30.81.30.92.71.40.0.2.31.61.50.73.41.00.80.41.50.3
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap38.11.850.53.438.03.233.62.535.92.025.73.120.01.927.82.424.32.625.24.222.13.514.41.611.41.334.51.928.30.6
small gap37.71.831.63.238.83.339.42.641.92.129.43.238.22.239.02.733.03.030.54.531.44.133.72.127.41.833.11.935.20.7
medium gap13.41.39.72.08.51.913.51.89.61.324.83.218.71.813.61.918.82.520.33.918.73.521.61.823.41.713.81.416.10.5
large gap10.11.17.21.711.82.111.31.711.91.319.62.821.61.817.62.022.32.622.14.026.43.728.92.035.31.917.91.519.00.5
very large gap0.70.31.00.72.91.02.20.80.80.40.50.51.50.62.00.81.60.81.91.31.41.01.40.52.40.60.60.31.40.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #875960/342292
NFI4
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: 1.4 x 1.4 km grid
state2009/17
economic region
Western JuraEastern JuraWestern PlateauCentral PlateauEastern PlateauWestern Pre-AlpsCentral Pre-AlpsEastern Pre-AlpsNorthwestern AlpsCentral AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern Alps Switzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %± %± %± %± %± %± %± %± %±
n/ano gap37.61.952.23.639.83.333.12.635.72.128.24.922.52.628.83.327.23.923.35.328.95.816.52.614.71.928.43.331.10.8
small gap37.11.931.93.334.63.338.22.841.52.128.64.832.82.836.33.530.44.124.75.422.95.726.83.126.52.424.23.133.60.8
medium gap13.01.47.41.99.02.015.52.110.11.321.84.620.92.513.12.519.43.615.24.426.05.921.62.921.42.219.82.915.30.6
large gap11.31.37.41.813.42.311.11.812.01.421.34.522.32.419.42.923.03.835.15.922.15.534.63.435.72.626.63.218.70.7
very large gap0.80.41.10.83.11.12.20.90.80.40.0.1.40.72.31.10.0.1.71.70.0.0.50.51.70.71.00.71.30.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap21.79.60.0...0.0...0.0.29.624.030.326.063.411.726.810.414.57.918.96.417.88.133.56.427.63.2
small gap22.59.90.0...100.0...0.0.23.220.630.326.012.58.225.59.837.111.823.87.023.59.232.26.326.73.2
medium gap44.811.8100.0...0.0...100.0.22.720.339.429.212.18.016.48.732.811.322.06.931.39.914.54.823.53.0
large gap10.97.30.0...0.0...0.0.24.521.40.0.12.07.926.410.215.68.432.77.822.89.019.75.420.72.9
very large gap0.0.0.0...0.0...0.0.0.0.0.0.0.0.5.04.90.0.2.62.64.64.50.0.1.50.9
total100.0.100.0...100.0...100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap40.64.055.610.032.99.638.37.041.88.924.83.822.22.832.03.522.23.324.15.925.44.614.91.814.01.732.52.025.20.9
small gap39.04.020.48.163.29.945.07.239.38.829.84.140.43.237.83.634.33.833.16.531.64.934.62.525.22.233.82.034.01.0
medium gap12.82.720.18.10.0.2.02.06.54.526.44.015.82.412.92.519.53.225.86.012.23.519.72.121.92.114.51.517.10.8
large gap7.62.23.93.83.83.812.24.712.45.918.23.520.32.616.12.721.53.316.95.228.74.728.62.336.02.418.51.622.20.8
very large gap0.0.0.0.0.0.2.42.40.0.0.80.81.30.71.20.92.61.30.0.2.11.52.20.82.90.90.70.41.50.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap37.91.752.23.439.13.133.72.436.02.026.13.022.41.930.42.426.62.524.13.625.53.415.61.514.41.331.61.628.60.6
small gap37.21.730.53.137.53.239.32.641.32.129.23.136.32.137.02.531.52.728.13.929.23.631.41.925.81.631.41.633.60.6
medium gap13.71.29.32.08.11.813.61.89.91.324.83.018.51.713.21.819.02.319.53.419.23.120.51.621.91.515.71.316.30.5
large gap10.61.16.91.612.52.111.21.712.01.319.42.721.41.717.71.921.62.426.83.825.03.330.91.935.51.720.51.420.20.5
very large gap0.70.31.00.72.81.02.20.80.70.40.40.41.30.51.80.71.30.71.51.01.10.81.70.52.40.60.70.31.40.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #875961/342293
NFI4
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 NFI3/NFI4
grid: 1.4 x 1.4 km grid
state2009/17
economic region
Western JuraEastern JuraWestern PlateauCentral PlateauEastern PlateauWestern Pre-AlpsCentral Pre-AlpsEastern Pre-AlpsNorthwestern AlpsCentral AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern Alps Switzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %± %± %± %± %± %± %± %± %±
n/ano gap37.52.051.23.640.03.333.32.635.62.126.64.819.72.526.83.327.23.827.65.125.85.014.92.514.31.729.83.030.30.8
small gap37.12.032.53.434.83.338.22.841.62.228.24.733.62.938.03.629.64.027.45.128.25.427.73.230.22.324.72.934.10.8
medium gap13.11.47.61.99.12.015.22.110.21.323.04.721.92.613.12.517.73.314.14.025.35.223.03.021.72.121.42.715.70.6
large gap11.51.37.51.813.02.311.11.811.81.422.14.523.32.519.82.925.53.829.55.220.74.833.93.432.62.323.62.818.60.6
very large gap0.90.41.10.83.11.12.20.90.80.40.0.1.50.82.41.20.0.1.41.40.0.0.50.51.30.60.40.41.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap21.79.60.0...0.0...0.0.29.624.030.326.063.411.728.210.815.38.316.16.019.78.933.56.427.63.2
small gap22.59.90.0...100.0...0.0.23.220.630.326.012.58.226.810.239.312.326.77.320.99.330.56.226.73.2
medium gap44.811.8100.0...0.0...100.0.22.720.339.429.212.18.012.08.029.011.322.06.934.610.714.54.823.03.1
large gap10.97.30.0...0.0...0.0.24.521.40.0.12.07.927.710.716.58.832.67.719.98.921.55.521.12.9
very large gap0.0.0.0...0.0...0.0.0.0.0.0.0.0.5.35.10.0.2.62.65.14.90.0.1.50.9
total100.0.100.0...100.0...100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap40.24.155.610.032.99.639.27.141.88.924.63.822.12.832.03.521.83.323.35.723.64.614.71.813.51.732.82.025.10.9
small gap39.24.020.48.163.29.943.87.239.38.830.44.141.13.337.83.634.83.833.76.432.85.135.02.525.62.233.82.034.31.0
medium gap12.82.820.18.10.0.2.12.06.54.526.24.016.12.412.92.519.03.224.85.811.73.519.92.121.92.114.31.517.00.8
large gap7.72.23.93.83.83.812.54.812.45.918.13.519.52.516.12.721.83.318.25.229.84.828.42.336.12.418.41.622.10.8
very large gap0.0.0.0.0.0.2.52.40.0.0.80.81.30.71.20.92.61.30.0.2.11.51.90.72.90.90.70.31.50.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap37.61.751.43.439.33.234.02.536.02.025.42.920.91.929.42.426.52.526.13.623.83.114.91.414.01.232.11.628.20.6
small gap37.21.731.03.137.73.239.22.641.52.129.43.137.12.137.82.531.32.729.63.831.53.532.01.927.71.631.21.634.00.6
medium gap13.81.39.52.08.11.813.41.810.01.325.23.019.11.813.21.818.12.217.83.118.93.021.11.722.11.516.21.316.50.5
large gap10.81.17.11.712.12.111.21.711.81.319.72.721.51.717.82.022.92.425.13.524.83.230.51.933.91.619.91.320.10.5
very large gap0.70.31.00.72.81.02.20.80.80.40.40.41.40.51.80.71.30.71.31.01.10.71.50.52.20.50.60.31.30.1
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #875962/342294
NFI4
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
grid: 1.4 x 1.4 km grid
state2009/17
economic region
Western JuraEastern JuraWestern PlateauCentral PlateauEastern PlateauWestern Pre-AlpsCentral Pre-AlpsEastern Pre-AlpsNorthwestern AlpsCentral AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern Alps Switzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %± %± %± %± %± %± %± %± %±
n/ano gap37.61.952.23.639.83.333.42.635.72.128.74.823.42.629.63.329.83.831.45.031.35.018.62.617.11.830.42.931.50.8
small gap37.11.931.93.334.63.338.02.741.52.128.14.632.52.836.43.529.93.826.54.826.04.926.72.929.22.225.32.833.50.8
medium gap13.01.47.41.99.02.015.42.110.11.322.14.520.72.412.82.416.93.112.43.524.74.921.32.720.81.921.02.615.40.6
large gap11.31.37.41.813.42.311.01.812.01.421.24.322.02.418.92.823.43.528.44.818.14.332.93.131.42.222.62.618.40.6
very large gap0.80.41.10.83.11.12.20.90.80.40.0.1.40.72.21.10.0.1.21.20.0.0.50.51.60.60.80.51.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap21.79.60.0...0.0...0.0.29.624.030.326.063.411.726.810.414.57.918.36.317.07.832.96.327.23.1
small gap22.59.90.0...100.0...0.0.23.220.630.326.012.58.225.59.837.111.826.07.122.48.831.76.226.83.2
medium gap44.811.8100.0...0.0...100.0.22.720.339.429.212.18.016.48.732.811.321.46.729.99.514.24.723.13.0
large gap10.97.30.0...0.0...0.0.24.521.40.0.12.07.926.410.215.68.431.77.626.29.221.25.421.42.9
very large gap0.0.0.0...0.0...0.0.0.0.0.0.0.0.5.04.90.0.2.52.54.44.30.0.1.50.8
total100.0.100.0...100.0...100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap40.64.055.610.032.99.638.37.041.88.924.63.822.52.832.03.522.23.324.25.725.44.614.81.815.11.832.81.925.50.9
small gap39.04.020.48.163.29.945.07.239.38.830.44.140.23.237.83.634.33.832.66.231.64.934.72.525.32.234.02.034.00.9
medium gap12.82.720.18.10.0.2.02.06.54.526.24.015.82.412.92.519.53.224.05.712.23.519.72.121.52.014.21.416.90.8
large gap7.62.23.93.83.83.812.24.712.45.918.13.520.32.516.12.721.53.319.25.228.74.728.62.335.32.418.31.622.10.8
very large gap0.0.0.0.0.0.2.42.40.0.0.80.81.20.71.20.92.61.30.0.2.11.52.20.82.90.80.70.31.50.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap37.91.752.23.439.13.133.92.436.02.026.33.023.01.930.72.427.82.428.33.526.93.216.41.516.21.232.11.529.00.6
small gap37.21.730.53.137.53.239.22.641.32.129.33.036.02.137.02.531.22.628.53.629.73.431.31.827.21.531.41.633.50.6
medium gap13.71.29.32.08.11.813.61.89.91.324.73.018.41.713.01.817.92.217.03.019.52.920.41.621.41.416.11.216.20.5
large gap10.61.16.91.612.52.111.21.712.01.319.32.721.21.717.41.921.92.324.93.422.93.030.31.833.01.619.71.319.90.5
very large gap0.70.31.00.72.81.02.20.80.70.40.40.41.30.51.70.71.30.61.20.91.00.71.60.52.30.50.70.31.30.1
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #875963/342295
NFI4
number of forest plots
rockfall SilvaProtect · area of largest gap (aerial photo, 5 classes)
unit of reference: economic region
unit: %
unit of evaluation: forest NFI3/NFI4
grid: 1.4 x 1.4 km grid
state2009/17
economic region
Western JuraEastern JuraWestern PlateauCentral PlateauEastern PlateauWestern Pre-AlpsCentral Pre-AlpsEastern Pre-AlpsNorthwestern AlpsCentral AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern Alps Switzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %± %± %± %± %± %± %± %± %±
n/an/a0.50.30.50.51.40.81.00.60.0.4.02.03.41.11.20.98.52.310.43.34.82.48.21.82.60.813.52.13.20.3
no gap37.32.051.03.639.43.333.02.635.62.125.64.619.12.426.33.225.93.625.64.724.64.813.72.313.81.725.42.629.30.7
small gap36.91.932.43.434.33.337.92.741.62.227.14.632.52.937.83.626.73.724.24.626.95.225.42.929.52.222.22.533.10.8
medium gap13.01.47.51.98.92.015.02.110.21.322.14.521.12.512.82.515.93.012.53.524.15.021.22.821.02.018.32.315.20.6
large gap11.51.37.51.812.92.211.01.811.81.421.24.422.52.419.42.923.03.526.14.719.74.631.13.131.82.320.12.418.00.6
very large gap0.90.41.10.83.11.12.20.90.80.40.0.1.50.72.41.20.0.1.21.20.0.0.50.51.20.50.40.41.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.
inside perimetern/a0.0.0.0...0.0...0.0.0.0.0.0.0.0.14.27.720.19.15.03.50.0.5.02.85.91.7
no gap21.79.60.0...0.0...0.0.29.624.030.326.063.411.723.09.111.66.415.35.717.88.131.36.025.33.0
small gap22.59.90.0...100.0...0.0.23.220.630.326.012.58.221.88.629.710.225.47.023.59.230.16.025.53.0
medium gap44.811.8100.0...0.0...100.0.22.720.339.429.212.18.014.07.626.29.520.96.631.39.913.54.522.02.9
large gap10.97.30.0...0.0...0.0.24.521.40.0.12.07.922.69.012.46.831.07.422.89.020.15.219.92.8
very large gap0.0.0.0...0.0...0.0.0.0.0.0.0.0.4.34.20.0.2.52.44.64.50.0.1.40.8
total100.0.100.0...100.0...100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.
outside perimetern/a0.60.60.0.0.0.0.0.0.0.1.71.22.51.03.31.31.71.06.63.28.12.91.60.63.40.94.50.83.00.3
no gap40.04.055.610.032.99.638.37.041.88.924.23.721.82.730.93.421.83.323.05.423.34.314.71.813.21.731.31.924.60.8
small gap39.04.020.48.163.29.945.07.239.38.829.84.139.73.236.63.533.73.830.96.029.14.634.42.424.82.132.41.933.20.9
medium gap12.82.720.18.10.0.2.02.06.54.525.83.915.62.312.52.519.13.122.85.411.23.319.52.021.12.013.61.416.50.7
large gap7.62.23.93.83.83.812.24.712.45.917.83.419.22.515.62.621.13.216.74.826.44.428.02.334.72.317.51.521.40.8
very large gap0.0.0.0.0.0.2.42.40.0.0.80.81.20.71.20.82.51.30.0.1.91.31.90.72.80.80.60.31.40.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.
totaln/a0.50.30.50.51.30.70.80.50.0.2.71.12.90.72.20.84.71.29.62.38.22.04.10.82.90.67.20.83.20.2
no gap37.41.751.23.438.83.133.62.436.02.024.72.920.41.828.62.325.82.424.33.322.52.914.41.413.61.229.61.527.30.5
small gap37.01.730.93.137.23.139.02.641.52.128.63.035.82.137.12.529.42.526.33.428.33.330.71.827.11.529.31.532.90.6
medium gap13.71.29.42.08.01.813.21.810.01.324.53.018.51.712.91.817.32.116.32.917.92.820.11.621.31.415.01.215.90.5
large gap10.71.17.01.711.92.011.11.711.81.319.22.721.01.717.31.921.52.322.33.222.22.929.31.832.91.618.41.219.40.5
very large gap0.70.31.00.72.81.02.20.80.80.40.40.41.30.51.80.71.20.61.20.80.90.71.40.52.10.50.50.21.30.1
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #875964/342296
NFI4
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: 1.4 x 1.4 km grid
state2009/17
production region
JuraPlateauPre-AlpsAlpsSouthern Alps Switzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %±
n/ano gap40.91.835.61.521.91.914.51.537.24.830.80.8
small gap36.61.739.51.535.62.230.12.027.74.535.90.9
medium gap11.51.211.31.018.71.822.71.815.63.614.90.7
large gap10.01.111.81.022.11.931.82.019.53.917.10.7
very large gap0.90.41.80.41.70.60.90.40.0.1.30.2
total100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap20.59.20.0.25.515.528.54.638.37.030.13.5
small gap21.49.5100.0.25.815.725.04.430.76.626.73.4
medium gap47.711.50.0.35.916.921.64.214.55.123.03.2
large gap10.47.00.0.12.812.022.84.316.55.419.13.0
very large gap0.0.0.0.0.0.2.01.40.0.1.10.8
total100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap43.03.838.74.825.21.916.11.233.62.225.00.9
small gap36.43.746.74.937.92.131.61.534.52.234.81.0
medium gap13.52.62.91.717.41.720.81.313.31.617.00.8
large gap7.22.010.53.018.31.729.21.517.71.721.70.9
very large gap0.0.1.11.01.20.52.30.50.80.41.50.3
total100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap40.91.635.91.423.61.316.30.934.51.928.40.6
small gap36.31.540.31.536.71.530.71.133.11.935.10.7
medium gap12.61.110.50.918.21.221.51.013.81.416.00.5
large gap9.50.911.70.920.11.229.71.117.91.519.10.5
very large gap0.80.31.70.41.40.41.80.30.60.31.40.2
total100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #875965/342297
NFI4
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: 1.4 x 1.4 km grid
state2009/17
production region
JuraPlateauPre-AlpsAlpsSouthern Alps Switzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %±
n/ano gap40.81.736.11.522.81.916.11.429.53.630.30.8
small gap36.01.739.01.533.92.127.61.722.93.334.10.8
medium gap11.81.111.31.019.21.722.01.619.03.115.50.6
large gap10.61.111.81.022.51.833.41.828.13.518.90.7
very large gap0.90.31.70.41.60.60.80.30.60.61.30.2
total100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap20.59.20.0.25.515.527.04.334.16.528.23.3
small gap21.49.5100.0.25.815.723.84.131.06.326.23.2
medium gap47.711.50.0.35.916.922.64.114.74.823.33.1
large gap10.47.00.0.12.812.023.74.120.15.420.83.0
very large gap0.0.0.0.0.0.2.81.60.0.1.60.9
total100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap42.53.838.74.826.21.916.21.132.22.024.90.9
small gap36.63.746.74.937.42.131.01.433.72.034.11.0
medium gap13.92.62.91.717.41.620.31.214.81.517.20.8
large gap7.12.010.53.017.91.630.11.418.61.722.30.8
very large gap0.0.1.11.01.10.52.30.50.70.41.50.2
total100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap40.71.636.31.424.51.316.80.931.71.728.00.6
small gap35.81.539.81.435.61.529.31.031.21.733.90.6
medium gap12.81.110.60.918.41.221.10.915.71.316.40.5
large gap10.00.911.70.920.11.231.01.120.71.420.30.5
very large gap0.70.31.70.41.30.41.80.30.60.31.40.2
total100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #875966/342298
NFI4
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: 1.4 x 1.4 km grid
state2009/17
production region
JuraPlateauPre-AlpsAlpsSouthern Alps Switzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %±
n/ano gap41.11.736.11.525.51.919.11.428.43.331.10.8
small gap35.81.738.81.533.22.026.81.624.23.133.60.8
medium gap11.71.111.31.018.31.720.91.419.82.915.30.6
large gap10.41.112.01.021.41.732.31.726.63.218.70.7
very large gap0.90.31.70.41.50.51.00.41.00.71.30.2
total100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap20.59.20.0.25.515.526.24.133.56.427.63.2
small gap21.49.5100.0.25.815.724.14.032.26.326.63.2
medium gap47.711.50.0.35.916.923.04.014.54.823.33.0
large gap10.47.00.0.12.812.024.14.019.75.420.92.9
very large gap0.0.0.0.0.0.2.61.50.0.1.50.9
total100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap42.83.838.44.826.11.916.91.132.52.025.20.9
small gap36.43.747.24.937.02.130.71.433.82.033.91.0
medium gap13.82.62.91.717.21.620.11.214.51.517.00.8
large gap7.02.010.43.018.51.629.91.418.51.622.30.8
very large gap0.0.1.01.01.10.52.40.50.70.41.50.2
total100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap41.01.536.31.425.81.318.30.931.61.628.60.6
small gap35.71.539.71.435.11.428.81.031.41.633.50.6
medium gap12.71.110.60.917.91.220.60.915.71.316.20.5
large gap9.90.911.90.919.91.230.51.020.51.420.30.5
very large gap0.70.31.70.41.30.31.80.30.70.31.40.2
total100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #875967/342299
NFI4
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 NFI3/NFI4
grid: 1.4 x 1.4 km grid
state2009/17
production region
JuraPlateauPre-AlpsAlpsSouthern Alps Switzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %±
n/ano gap40.81.736.11.523.21.818.71.329.83.030.30.8
small gap36.01.739.01.534.12.029.11.524.72.934.10.8
medium gap11.81.111.31.018.91.721.01.421.42.715.70.6
large gap10.61.111.81.022.21.830.51.523.62.818.70.6
very large gap0.90.31.70.41.60.50.80.30.40.41.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap20.59.20.0.25.515.526.34.233.56.427.63.2
small gap21.49.5100.0.25.815.725.04.230.56.226.73.2
medium gap47.711.50.0.35.916.922.04.014.54.822.83.0
large gap10.47.00.0.12.812.024.04.121.55.521.43.0
very large gap0.0.0.0.0.0.2.71.60.0.1.50.9
total100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap42.53.838.74.826.11.916.51.132.82.025.20.9
small gap36.63.746.74.937.42.131.21.433.82.034.21.0
medium gap13.92.62.91.717.31.620.11.214.31.517.00.8
large gap7.12.010.53.018.01.630.01.418.41.622.20.8
very large gap0.0.1.11.01.10.52.30.50.70.31.40.2
total100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap40.71.636.31.424.71.317.90.832.11.628.20.6
small gap35.81.539.71.435.71.429.91.031.21.633.90.6
medium gap12.81.110.60.918.31.220.60.916.21.316.40.5
large gap10.00.911.70.920.11.229.91.019.91.320.20.5
very large gap0.70.31.70.41.30.41.70.30.60.31.30.1
total100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #875968/342300
NFI4
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
grid: 1.4 x 1.4 km grid
state2009/17
production region
JuraPlateauPre-AlpsAlpsSouthern Alps Switzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %±
n/ano gap41.11.736.11.526.31.922.01.330.42.931.50.8
small gap35.81.738.81.533.02.028.21.425.32.833.50.8
medium gap11.71.111.31.018.11.619.81.321.02.615.40.6
large gap10.41.112.01.021.11.729.11.422.62.618.40.6
very large gap0.90.31.70.41.50.50.90.30.80.51.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeterno gap20.59.20.0.25.515.525.84.132.96.327.23.1
small gap21.49.5100.0.25.815.724.64.031.76.226.73.1
medium gap47.711.50.0.35.916.922.63.914.24.723.03.0
large gap10.47.00.0.12.812.024.54.021.25.421.62.9
very large gap0.0.0.0.0.0.2.61.50.0.1.50.9
total100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeterno gap42.83.838.44.826.21.917.31.132.81.925.50.9
small gap36.43.747.24.937.12.130.81.434.02.034.00.9
medium gap13.82.62.91.717.21.619.91.214.21.416.90.7
large gap7.02.010.43.018.41.629.71.418.31.622.20.8
very large gap0.0.1.01.01.10.52.30.50.70.31.50.2
total100.0.100.0.100.0.100.0.100.0.100.0.
totalno gap41.01.536.31.426.31.319.80.832.11.529.00.6
small gap35.71.539.61.434.91.429.31.031.41.633.50.6
medium gap12.71.110.60.917.81.120.00.916.11.216.20.5
large gap9.90.911.90.919.81.129.21.019.71.320.00.5
very large gap0.70.31.60.41.30.31.70.30.70.31.30.1
total100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #875969/342301
NFI4
number of forest plots
rockfall SilvaProtect · area of largest gap (aerial photo, 5 classes)
unit of reference: production region
unit: %
unit of evaluation: forest NFI3/NFI4
grid: 1.4 x 1.4 km grid
state2009/17
production region
JuraPlateauPre-AlpsAlpsSouthern Alps Switzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %±
n/an/a0.50.30.60.22.80.75.80.813.52.13.20.3
no gap40.61.735.91.522.61.817.81.225.42.629.40.7
small gap35.81.738.81.533.22.027.31.422.22.533.00.8
medium gap11.71.111.31.018.41.719.61.318.32.315.20.6
large gap10.61.111.81.021.61.728.71.520.12.418.10.6
very large gap0.90.31.70.41.50.50.70.30.40.41.10.2
total100.0.100.0.100.0.100.0.100.0.100.0.
inside perimetern/a0.0.0.0.0.0.7.32.45.02.85.71.6
no gap20.59.20.0.25.515.523.53.831.36.025.43.0
small gap21.49.5100.0.25.815.723.23.830.16.025.53.0
medium gap47.711.50.0.35.916.921.33.713.54.521.92.9
large gap10.47.00.0.12.812.022.33.820.15.220.12.8
very large gap0.0.0.0.0.0.2.41.40.0.1.40.8
total100.0.100.0.100.0.100.0.100.0.100.0.
outside perimetern/a0.50.50.0.2.60.73.10.54.50.83.00.3
no gap42.23.838.44.825.51.916.31.131.31.924.60.8
small gap36.43.747.24.936.32.030.11.432.41.933.10.9
medium gap13.82.62.91.716.81.619.51.213.61.416.40.7
large gap7.02.010.43.017.71.628.91.417.51.521.50.8
very large gap0.0.1.01.01.10.42.20.40.60.31.40.2
total100.0.100.0.100.0.100.0.100.0.100.0.
totaln/a0.50.20.50.22.70.54.50.47.20.83.20.2
no gap40.51.536.11.424.01.317.40.829.61.527.30.5
small gap35.61.539.61.434.71.428.51.029.31.532.80.6
medium gap12.71.110.50.917.71.119.60.915.01.215.90.5
large gap10.00.911.60.919.61.128.41.018.41.219.50.5
very large gap0.70.31.70.41.30.31.60.30.50.21.30.1
total100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #875970/342302
NFI4
number of forest plots
rockfall SilvaProtect · area of largest gap (aerial photo, 5 classes)
unit of reference: production region
unit: %
unit of evaluation: forest
grid: 1.4 x 1.4 km grid
state2009/17
production region
JuraPlateauPre-AlpsAlpsSouthern Alps Switzerland
rockfall SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %±
n/an/a0.50.20.70.33.10.78.20.815.72.14.30.3
no gap40.91.735.91.525.51.820.21.225.62.530.10.7
small gap35.71.738.51.532.01.925.91.321.32.432.00.7
medium gap11.61.111.21.017.51.618.21.217.72.214.70.6
large gap10.41.111.91.020.51.626.71.319.02.317.60.6
very large gap0.90.31.70.41.40.50.80.30.70.51.20.2
total100.0.100.0.100.0.100.0.100.0.100.0.
inside perimetern/a0.0.0.0.0.0.8.72.55.02.86.51.7
no gap20.59.20.0.25.515.523.53.831.36.025.43.0
small gap21.49.5100.0.25.815.722.43.730.16.025.03.0
medium gap47.711.50.0.35.916.920.63.613.54.521.52.8
large gap10.47.00.0.12.812.022.43.720.15.220.22.8
very large gap0.0.0.0.0.0.2.41.30.0.1.40.8
total100.0.100.0.100.0.100.0.100.0.100.0.
outside perimetern/a0.50.51.01.02.60.73.20.54.70.83.10.3
no gap42.63.838.04.725.51.816.71.131.21.924.70.8
small gap36.23.646.84.936.12.029.81.432.41.932.90.9
medium gap13.72.62.91.616.71.619.31.213.51.416.30.7
large gap7.02.010.33.018.01.628.71.317.51.521.50.8
very large gap0.0.1.01.01.10.42.30.40.60.31.40.2
total100.0.100.0.100.0.100.0.100.0.100.0.
totaln/a0.50.20.80.32.80.55.80.58.10.93.90.2
no gap40.81.536.01.425.51.318.70.829.51.427.90.5
small gap35.51.539.31.433.91.427.60.928.91.532.10.6
medium gap12.61.010.50.917.31.118.90.814.81.115.60.4
large gap9.80.911.80.919.21.127.50.918.11.219.20.5
very large gap0.70.31.60.41.30.31.60.30.60.21.30.1
total100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #875971/342303
NFI4
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: 1.4 x 1.4 km grid
state2009/17
canton
AGAIARBEBL/BSFRGEGLGRJULUNENWOWSGSHSOSZTGTIURVDVSZGZH Switzerland
avalanches SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %± %±
n/ano gap46.43.225.38.622.06.315.71.341.15.120.12.863.216.17.12.85.40.827.63.420.92.827.03.711.75.712.13.411.21.943.26.644.53.911.92.734.74.56.51.06.22.824.61.94.00.813.76.729.82.817.10.5
small gap34.23.17.85.336.17.217.91.327.64.721.63.010.510.511.93.811.01.121.93.229.53.140.14.218.56.98.42.713.42.139.86.631.73.719.33.429.84.34.90.910.23.428.42.08.21.129.08.345.03.219.00.5
medium gap8.81.83.93.90.0.9.61.04.92.212.62.410.510.513.73.99.31.08.82.215.02.513.72.95.43.910.83.37.11.68.73.87.92.15.72.08.82.93.70.79.73.39.91.46.71.12.62.611.92.18.70.4
large gap9.41.810.66.03.82.68.91.06.42.510.32.115.711.46.52.814.51.26.91.914.22.44.41.816.16.719.54.09.31.85.33.05.81.915.13.014.13.25.90.917.04.113.91.511.01.311.85.69.51.910.50.4
very large gap1.20.70.0.3.23.20.80.30.0.0.60.60.0.0.0.0.50.20.60.61.50.81.01.00.0.1.01.01.10.60.0.0.80.81.41.00.60.60.20.20.0.1.50.60.20.20.0.0.50.50.70.1
total100.0.47.69.765.07.052.91.779.94.165.23.1100.0.39.35.640.71.765.73.681.12.886.22.851.78.551.85.242.03.096.92.190.52.453.54.288.13.021.11.643.15.578.21.930.11.957.18.496.71.256.00.6
inside perimeterno gap0.0.3.93.90.0.1.90.50.0.0.80.60.0.6.32.71.60.41.60.90.90.71.81.25.43.95.12.32.51.00.0.0.60.61.41.00.0.1.10.44.02.32.30.71.80.50.0.0.0.1.60.2
small gap0.0.3.93.90.0.2.10.50.0.0.0.0.0.6.22.82.30.50.50.50.60.62.01.15.23.81.11.13.61.20.0.0.0.0.80.80.0.3.20.712.13.71.90.67.61.13.13.10.0.2.50.2
medium gap0.0.0.0.1.91.92.30.50.0.0.80.60.0.6.82.93.80.60.60.60.0.0.0.3.33.30.70.70.40.40.0.0.0.1.20.80.0.1.70.54.72.30.60.45.00.90.0.0.0.1.90.2
large gap0.0.2.82.80.0.0.90.30.0.0.40.40.0.7.12.85.30.80.0.0.0.0.0.0.0.1.71.31.70.80.0.0.0.1.41.00.0.1.80.52.51.80.60.35.91.00.0.0.0.2.00.2
very large gap0.0.0.0.0.0.0.50.20.0.0.50.50.0.0.0.0.40.20.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.80.80.0.0.0.0.0.0.0.0.50.30.0.0.0.0.20.1
total0.0.10.76.11.91.97.80.90.0.2.51.00.0.26.45.013.31.12.71.21.50.93.71.614.06.18.72.98.21.70.0.0.60.65.51.90.0.7.91.123.24.75.41.020.81.63.13.10.0.8.20.3
outside perimeterno gap0.0.7.95.413.25.29.91.010.03.08.72.00.0.11.23.57.20.99.32.23.91.43.11.418.06.46.02.514.22.11.51.54.41.712.82.85.52.126.71.810.23.45.01.08.61.25.13.41.30.79.50.4
small gap0.0.25.97.811.24.215.71.22.11.510.12.10.0.14.64.113.51.217.52.96.51.85.41.94.32.96.92.617.62.31.51.51.50.812.62.83.51.823.41.75.82.67.31.215.91.523.07.91.10.712.20.4
medium gap0.0.3.93.95.03.75.70.87.92.96.61.60.0.2.41.78.81.02.31.23.01.21.10.83.13.114.23.77.51.60.0.2.31.34.61.71.11.19.91.210.03.42.70.79.21.25.64.00.0.5.90.3
large gap0.0.3.93.93.82.67.70.90.0.6.81.70.0.3.92.215.21.22.41.23.51.30.60.68.95.012.33.310.51.90.0.0.80.89.42.51.81.310.71.27.73.11.40.514.41.56.14.10.90.67.80.3
very large gap0.0.0.0.0.0.0.40.20.0.0.0.0.0.2.31.61.30.40.0.0.50.50.0.0.0.0.0.0.0.0.0.0.0.1.51.00.0.0.30.20.0.0.0.0.90.40.0.0.0.0.40.1
total0.0.41.79.633.17.039.41.720.14.132.33.10.0.34.45.446.11.731.53.517.42.710.12.434.48.039.55.149.83.13.12.18.92.340.94.211.93.071.01.833.75.416.41.749.02.139.98.63.31.235.80.6
totalno gap46.43.237.19.435.27.327.51.551.15.329.73.263.216.124.64.814.31.238.63.725.73.031.83.935.18.123.34.327.82.844.76.749.43.926.13.640.24.634.31.920.44.531.92.114.51.518.97.331.12.928.10.6
small gap34.23.137.79.247.27.835.61.629.74.831.73.410.510.532.75.426.71.539.93.736.63.347.44.228.07.916.53.834.62.941.36.633.13.732.84.033.34.331.51.928.05.137.52.231.81.955.08.746.13.233.70.6
medium gap8.81.87.95.46.94.117.71.312.83.620.02.910.510.522.94.821.81.411.72.518.02.714.83.011.85.825.74.514.92.28.73.810.12.511.52.79.93.015.31.424.34.813.21.520.91.78.24.611.92.116.50.5
large gap9.41.817.47.47.53.617.51.36.42.517.52.515.711.417.44.335.01.69.22.217.72.64.91.925.17.533.54.621.52.55.33.06.52.026.03.615.93.418.41.627.35.015.91.631.21.917.97.010.41.920.30.5
very large gap1.20.70.0.3.23.21.70.40.0.1.00.70.0.2.31.62.10.50.60.62.01.01.01.00.0.1.01.01.10.60.0.0.80.83.71.60.60.60.50.30.0.1.50.61.60.50.0.0.50.51.40.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #875972/342304
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