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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 | 32.9 | 1.0 | 11.0 | 1.0 | 13.0 | 1.3 | 5.0 | 0.9 | 7.1 | 0.9 | 7.9 | 0.9 | 17.3 | 0.5 |
small gap | 32.5 | 1.0 | 14.8 | 1.1 | 15.9 | 1.4 | 9.3 | 1.2 | 15.0 | 1.3 | 6.5 | 0.8 | 19.4 | 0.5 | |
medium gap | 9.9 | 0.6 | 9.8 | 0.9 | 7.6 | 1.0 | 7.7 | 1.1 | 10.8 | 1.1 | 5.7 | 0.8 | 8.9 | 0.4 | |
large gap | 9.7 | 0.6 | 11.4 | 1.0 | 10.7 | 1.2 | 11.4 | 1.3 | 16.2 | 1.3 | 6.2 | 0.8 | 10.6 | 0.4 | |
very large gap | 1.2 | 0.2 | 0.4 | 0.2 | 0.8 | 0.3 | 0.2 | 0.2 | 0.6 | 0.3 | 0.1 | 0.1 | 0.7 | 0.1 | |
total | 86.2 | 0.7 | 47.4 | 1.6 | 47.9 | 1.9 | 33.5 | 1.8 | 49.7 | 1.7 | 26.4 | 1.4 | 56.9 | 0.6 | |
inside perimeter | no gap | 0.2 | 0.1 | 1.2 | 0.4 | 1.3 | 0.4 | 1.0 | 0.4 | 0.5 | 0.2 | 2.2 | 0.5 | 0.9 | 0.1 |
small gap | 0.2 | 0.1 | 0.3 | 0.2 | 1.7 | 0.5 | 1.6 | 0.5 | 0.5 | 0.3 | 2.0 | 0.5 | 0.8 | 0.1 | |
medium gap | 0.4 | 0.1 | 0.4 | 0.2 | 1.2 | 0.4 | 1.3 | 0.5 | 0.8 | 0.3 | 0.9 | 0.3 | 0.7 | 0.1 | |
large gap | 0.1 | 0.1 | 0.3 | 0.2 | 1.2 | 0.4 | 2.0 | 0.6 | 0.5 | 0.2 | 1.4 | 0.4 | 0.7 | 0.1 | |
very large gap | 0.0 | . | 0.0 | . | 0.1 | 0.1 | 0.2 | 0.2 | 0.1 | 0.1 | 0.0 | . | 0.0 | 0.0 | |
total | 0.9 | 0.2 | 2.2 | 0.5 | 5.4 | 0.9 | 6.0 | 1.0 | 2.4 | 0.5 | 6.5 | 0.8 | 3.1 | 0.2 | |
outside perimeter | no gap | 5.3 | 0.5 | 11.4 | 1.0 | 13.1 | 1.3 | 8.9 | 1.1 | 6.5 | 0.9 | 22.0 | 1.4 | 10.1 | 0.4 |
small gap | 5.2 | 0.5 | 18.3 | 1.2 | 16.7 | 1.4 | 21.1 | 1.6 | 12.2 | 1.1 | 22.7 | 1.4 | 13.7 | 0.4 | |
medium gap | 1.3 | 0.2 | 9.9 | 0.9 | 6.8 | 1.0 | 12.1 | 1.3 | 10.5 | 1.1 | 9.6 | 1.0 | 6.8 | 0.3 | |
large gap | 1.1 | 0.2 | 10.1 | 0.9 | 9.4 | 1.1 | 17.2 | 1.5 | 17.3 | 1.3 | 12.3 | 1.1 | 8.8 | 0.4 | |
very large gap | 0.1 | 0.1 | 0.8 | 0.3 | 0.6 | 0.3 | 1.2 | 0.4 | 1.4 | 0.4 | 0.5 | 0.2 | 0.6 | 0.1 | |
total | 12.8 | 0.7 | 50.5 | 1.6 | 46.6 | 1.9 | 60.5 | 1.9 | 47.9 | 1.7 | 67.1 | 1.6 | 39.9 | 0.6 | |
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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