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NFI3
number of forest plots
avalanches SilvaProtect · area of largest gap (aerial photo, 5 classes)
unit of reference: protection forest region
unit: %
unit of evaluation: accessible forest
grid: 1.4 x 1.4 km grid
state2004/06
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern Alps Switzerland
avalanches SilvaProtectarea of largest gap (aerial photo, 5 classes) %± %± %± %± %± %± %±
n/ano gap53.01.117.51.223.31.610.71.218.81.313.51.129.40.5
small gap13.10.710.20.98.11.07.51.17.20.93.60.69.30.4
medium gap8.80.69.00.96.30.97.41.18.71.04.50.77.80.3
large gap10.30.69.90.99.61.18.11.114.41.24.90.79.70.4
very large gap1.40.30.80.30.80.30.30.20.80.30.40.20.90.1
total86.60.747.41.548.01.933.91.849.91.726.81.457.20.5
inside perimeterno gap0.70.23.10.54.20.84.50.82.20.52.40.52.30.2
small gap0.10.12.30.51.80.55.10.92.30.52.50.51.80.2
medium gap0.10.11.30.41.70.54.80.93.50.61.80.41.60.2
large gap0.20.12.60.52.60.65.60.94.00.71.50.42.10.2
very large gap0.0.0.50.20.40.20.0.0.10.10.10.10.20.1
total1.10.29.80.910.71.220.11.612.21.18.20.98.00.3
outside perimeterno gap7.20.615.11.118.71.412.01.35.90.831.31.513.50.4
small gap2.30.39.70.96.00.913.61.48.91.011.71.17.30.3
medium gap1.40.38.80.97.11.09.81.28.31.08.10.96.00.3
large gap1.30.28.40.98.01.010.01.213.71.212.71.17.40.3
very large gap0.0.0.90.31.40.40.50.31.10.41.10.40.70.1
total12.30.742.91.541.31.846.02.037.91.764.91.634.80.6
totalno gap60.91.035.71.446.21.827.21.827.01.547.11.745.20.6
small gap15.50.822.21.315.91.426.21.818.41.317.81.318.40.5
medium gap10.30.719.11.215.01.322.01.720.51.414.41.215.40.5
large gap11.80.720.81.220.21.523.71.732.11.619.01.319.20.5
very large gap1.40.32.10.42.70.60.90.42.00.51.60.41.70.2
total100.0.100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 10.07.2020 #887333/353665
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