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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 | 38.4 | 1.1 | 26.2 | 1.9 | 30.7 | 2.4 | 18.6 | 2.6 | 17.1 | 1.8 | 30.4 | 2.9 | 31.5 | 0.8 |
small gap | 37.5 | 1.1 | 30.7 | 2.0 | 31.6 | 2.4 | 26.7 | 2.9 | 29.2 | 2.2 | 25.3 | 2.8 | 33.4 | 0.8 | |
medium gap | 11.5 | 0.7 | 19.7 | 1.8 | 15.2 | 1.9 | 21.3 | 2.7 | 20.8 | 1.9 | 21.0 | 2.6 | 15.4 | 0.6 | |
large gap | 11.3 | 0.7 | 22.6 | 1.8 | 21.0 | 2.1 | 32.9 | 3.1 | 31.4 | 2.2 | 22.6 | 2.6 | 18.4 | 0.6 | |
very large gap | 1.3 | 0.3 | 0.8 | 0.4 | 1.4 | 0.6 | 0.5 | 0.5 | 1.6 | 0.6 | 0.8 | 0.5 | 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 | 22.2 | 6.6 | 18.3 | 6.3 | 17.0 | 7.8 | 32.9 | 6.3 | 27.6 | 3.2 |
small gap | 25.7 | 9.9 | 13.3 | 7.2 | 29.5 | 7.2 | 26.0 | 7.1 | 22.4 | 8.8 | 31.7 | 6.2 | 26.4 | 3.1 | |
medium gap | 44.9 | 11.1 | 17.2 | 7.9 | 25.8 | 7.0 | 21.4 | 6.7 | 29.9 | 9.5 | 14.2 | 4.7 | 23.1 | 3.0 | |
large gap | 9.7 | 6.6 | 13.3 | 7.2 | 20.2 | 6.4 | 31.7 | 7.6 | 26.2 | 9.2 | 21.2 | 5.4 | 21.5 | 2.9 | |
very large gap | 0.0 | . | 0.0 | . | 2.3 | 2.3 | 2.5 | 2.5 | 4.4 | 4.3 | 0.0 | . | 1.4 | 0.8 | |
total | 100.0 | . | 100.0 | . | 100.0 | . | 100.0 | . | 100.0 | . | 100.0 | . | 100.0 | . | |
outside perimeter | no gap | 41.1 | 3.0 | 23.0 | 1.8 | 28.6 | 2.5 | 14.8 | 1.8 | 15.1 | 1.8 | 32.8 | 1.9 | 25.5 | 0.9 |
small gap | 40.5 | 3.0 | 35.8 | 2.1 | 35.3 | 2.6 | 34.7 | 2.5 | 25.3 | 2.2 | 34.0 | 2.0 | 34.0 | 0.9 | |
medium gap | 9.7 | 1.8 | 19.5 | 1.7 | 14.6 | 2.0 | 19.7 | 2.1 | 21.5 | 2.0 | 14.2 | 1.4 | 16.9 | 0.7 | |
large gap | 8.3 | 1.7 | 20.2 | 1.7 | 20.2 | 2.2 | 28.6 | 2.3 | 35.3 | 2.4 | 18.3 | 1.6 | 22.1 | 0.8 | |
very large gap | 0.4 | 0.4 | 1.5 | 0.5 | 1.2 | 0.6 | 2.2 | 0.8 | 2.9 | 0.8 | 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 | 38.6 | 1.0 | 25.3 | 1.3 | 29.3 | 1.7 | 16.4 | 1.5 | 16.2 | 1.2 | 32.1 | 1.5 | 29.1 | 0.6 |
small gap | 37.8 | 1.0 | 32.9 | 1.4 | 33.1 | 1.7 | 31.3 | 1.8 | 27.2 | 1.5 | 31.4 | 1.6 | 33.4 | 0.6 | |
medium gap | 11.6 | 0.7 | 19.5 | 1.2 | 15.5 | 1.3 | 20.4 | 1.6 | 21.4 | 1.4 | 16.1 | 1.2 | 16.2 | 0.5 | |
large gap | 10.9 | 0.7 | 21.2 | 1.2 | 20.6 | 1.5 | 30.3 | 1.8 | 33.0 | 1.6 | 19.7 | 1.3 | 20.0 | 0.5 | |
very large gap | 1.2 | 0.2 | 1.1 | 0.3 | 1.4 | 0.4 | 1.6 | 0.5 | 2.3 | 0.5 | 0.7 | 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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