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NFI4
forest area
rockfall SilvaProtect · degree of cover (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 SilvaProtectdegree of cover (aerial photo, 5 classes) %± %± %± %± %± %±
n/a0-20%1.60.41.40.42.10.61.70.45.41.31.90.2
21-40%1.90.52.00.46.11.014.51.114.22.07.10.4
41-60%7.20.95.50.719.81.627.01.423.72.515.50.6
61-80%19.21.417.01.128.11.932.41.425.52.524.20.7
over 80%70.11.574.01.243.92.024.41.331.22.751.30.7
total100.0.100.0.100.0.100.0.100.0.100.0.
inside perimeter0-20%0.0.0.0.0.0.0.80.81.61.60.90.7
21-40%5.45.20.0.0.0.6.52.23.32.35.21.5
41-60%0.0.0.0.0.0.16.23.310.13.912.42.3
61-80%27.210.30.0.61.717.230.24.116.94.927.33.1
over 80%67.510.8100.0.38.317.246.34.468.16.054.23.4
total100.0.100.0.100.0.100.0.100.0.100.0.
outside perimeter0-20%0.0.1.01.01.30.51.80.41.10.41.40.2
21-40%0.0.0.0.4.00.86.60.73.50.74.60.4
41-60%2.91.30.90.99.61.222.31.210.71.214.60.7
61-80%13.42.613.33.327.51.932.71.425.21.727.70.9
over 80%83.62.884.83.557.52.036.51.459.41.951.70.9
total100.0.100.0.100.0.100.0.100.0.100.0.
total0-20%1.30.41.40.31.70.41.70.32.50.51.70.2
21-40%1.70.41.90.45.00.610.30.66.80.86.00.3
41-60%6.30.85.10.614.71.024.20.914.71.115.10.4
61-80%18.41.216.71.128.11.332.41.024.81.425.70.5
over 80%72.41.375.01.150.51.331.40.951.31.551.50.5
total100.0.100.0.100.0.100.0.100.0.100.0.
© WSL, Swiss National Forest Inventory, 18.06.2020 #861488/327819
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