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protection forest region | |||||||||||||||
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Jura + Plateau | Northwestern Alps | Northeastern Alps | Southwestern Alps | Southeastern Alps | Southern Alps | Switzerland | |||||||||
rockfall SilvaProtect | area of largest gap (aerial photo, 5 classes) | % | ± | % | ± | % | ± | % | ± | % | ± | % | ± | % | ± |
n/a | no gap | 38.2 | 1.1 | 23.2 | 1.9 | 27.1 | 2.4 | 14.9 | 2.5 | 14.3 | 1.7 | 29.8 | 3.0 | 30.4 | 0.8 |
small gap | 37.6 | 1.1 | 31.3 | 2.1 | 33.3 | 2.6 | 27.7 | 3.2 | 30.2 | 2.3 | 24.7 | 2.9 | 34.0 | 0.8 | |
medium gap | 11.5 | 0.7 | 20.7 | 1.8 | 15.8 | 2.0 | 23.0 | 3.0 | 21.7 | 2.1 | 21.4 | 2.7 | 15.7 | 0.6 | |
large gap | 11.3 | 0.7 | 24.0 | 1.9 | 22.2 | 2.3 | 33.9 | 3.4 | 32.6 | 2.3 | 23.6 | 2.8 | 18.7 | 0.6 | |
very large gap | 1.4 | 0.3 | 0.8 | 0.4 | 1.6 | 0.7 | 0.5 | 0.5 | 1.3 | 0.6 | 0.4 | 0.4 | 1.2 | 0.2 | |
total | 100.0 | . | 100.0 | . | 100.0 | . | 100.0 | . | 100.0 | . | 100.0 | . | 100.0 | . | |
inside perimeter | no gap | 19.6 | 8.8 | 56.3 | 10.5 | 23.5 | 6.9 | 16.1 | 6.0 | 19.7 | 8.9 | 33.5 | 6.4 | 28.1 | 3.3 |
small gap | 25.7 | 9.9 | 13.3 | 7.2 | 31.1 | 7.5 | 26.7 | 7.3 | 20.9 | 9.3 | 30.5 | 6.2 | 26.4 | 3.2 | |
medium gap | 44.9 | 11.1 | 17.2 | 7.9 | 21.8 | 6.8 | 22.0 | 6.9 | 34.6 | 10.7 | 14.5 | 4.8 | 22.9 | 3.0 | |
large gap | 9.7 | 6.6 | 13.3 | 7.2 | 21.3 | 6.7 | 32.6 | 7.7 | 19.9 | 8.9 | 21.5 | 5.5 | 21.2 | 3.0 | |
very large gap | 0.0 | . | 0.0 | . | 2.4 | 2.4 | 2.6 | 2.6 | 5.1 | 4.9 | 0.0 | . | 1.5 | 0.9 | |
total | 100.0 | . | 100.0 | . | 100.0 | . | 100.0 | . | 100.0 | . | 100.0 | . | 100.0 | . | |
outside perimeter | no gap | 41.0 | 3.0 | 22.7 | 1.9 | 28.1 | 2.5 | 14.7 | 1.8 | 13.5 | 1.7 | 32.8 | 2.0 | 25.2 | 0.9 |
small gap | 40.4 | 3.0 | 36.3 | 2.1 | 35.8 | 2.6 | 35.0 | 2.5 | 25.6 | 2.2 | 33.8 | 2.0 | 34.2 | 1.0 | |
medium gap | 9.8 | 1.8 | 19.6 | 1.7 | 14.6 | 2.0 | 19.9 | 2.1 | 21.9 | 2.1 | 14.3 | 1.5 | 17.0 | 0.8 | |
large gap | 8.4 | 1.7 | 19.9 | 1.7 | 20.2 | 2.2 | 28.4 | 2.3 | 36.1 | 2.4 | 18.4 | 1.6 | 22.2 | 0.8 | |
very large gap | 0.4 | 0.4 | 1.5 | 0.5 | 1.3 | 0.6 | 1.9 | 0.7 | 2.9 | 0.9 | 0.7 | 0.3 | 1.5 | 0.2 | |
total | 100.0 | . | 100.0 | . | 100.0 | . | 100.0 | . | 100.0 | . | 100.0 | . | 100.0 | . | |
total | no gap | 38.4 | 1.0 | 23.6 | 1.3 | 27.4 | 1.7 | 14.9 | 1.4 | 14.0 | 1.2 | 32.1 | 1.6 | 28.2 | 0.6 |
small gap | 37.9 | 1.0 | 33.4 | 1.5 | 34.3 | 1.8 | 32.0 | 1.9 | 27.7 | 1.6 | 31.2 | 1.6 | 33.9 | 0.6 | |
medium gap | 11.6 | 0.7 | 20.1 | 1.3 | 15.6 | 1.4 | 21.1 | 1.7 | 22.1 | 1.5 | 16.2 | 1.3 | 16.5 | 0.5 | |
large gap | 10.9 | 0.7 | 21.7 | 1.3 | 21.3 | 1.5 | 30.5 | 1.9 | 33.9 | 1.6 | 19.9 | 1.3 | 20.2 | 0.5 | |
very large gap | 1.2 | 0.2 | 1.2 | 0.3 | 1.5 | 0.5 | 1.5 | 0.5 | 2.2 | 0.5 | 0.6 | 0.3 | 1.3 | 0.1 | |
total | 100.0 | . | 100.0 | . | 100.0 | . | 100.0 | . | 100.0 | . | 100.0 | . | 100.0 | . |
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