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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 | 52.8 | 1.1 | 15.9 | 1.2 | 19.0 | 1.5 | 6.6 | 1.0 | 10.7 | 1.2 | 7.5 | 1.0 | 27.1 | 0.5 |
small gap | 12.9 | 0.7 | 10.2 | 1.0 | 8.6 | 1.1 | 7.6 | 1.1 | 8.2 | 1.0 | 3.6 | 0.7 | 9.6 | 0.4 | |
medium gap | 8.8 | 0.6 | 9.4 | 0.9 | 6.6 | 1.0 | 7.1 | 1.1 | 9.6 | 1.1 | 4.9 | 0.8 | 8.1 | 0.4 | |
large gap | 10.3 | 0.7 | 9.6 | 0.9 | 9.9 | 1.2 | 8.4 | 1.2 | 15.4 | 1.3 | 5.1 | 0.8 | 9.9 | 0.4 | |
very large gap | 1.5 | 0.3 | 0.8 | 0.3 | 0.9 | 0.4 | 0.4 | 0.3 | 0.6 | 0.3 | 0.3 | 0.2 | 0.9 | 0.1 | |
total | 86.2 | 0.7 | 46.0 | 1.6 | 45.0 | 2.0 | 30.1 | 1.9 | 44.5 | 1.8 | 21.3 | 1.5 | 55.6 | 0.6 | |
inside perimeter | no gap | 0.3 | 0.1 | 1.2 | 0.3 | 2.6 | 0.6 | 1.7 | 0.5 | 0.8 | 0.3 | 3.2 | 0.6 | 1.3 | 0.1 |
small gap | 0.2 | 0.1 | 0.4 | 0.2 | 0.5 | 0.3 | 1.5 | 0.5 | 0.3 | 0.2 | 0.9 | 0.4 | 0.5 | 0.1 | |
medium gap | 0.4 | 0.1 | 0.1 | 0.1 | 0.9 | 0.4 | 2.0 | 0.6 | 0.8 | 0.3 | 1.2 | 0.4 | 0.7 | 0.1 | |
large gap | 0.0 | 0.0 | 0.5 | 0.2 | 1.6 | 0.5 | 0.9 | 0.4 | 0.5 | 0.3 | 1.6 | 0.5 | 0.6 | 0.1 | |
very large gap | 0.0 | . | 0.1 | 0.1 | 0.2 | 0.2 | 0.0 | . | 0.1 | 0.1 | 0.3 | 0.2 | 0.1 | 0.0 | |
total | 0.9 | 0.2 | 2.2 | 0.5 | 5.7 | 0.9 | 6.2 | 1.0 | 2.6 | 0.6 | 7.2 | 0.9 | 3.2 | 0.2 | |
outside perimeter | no gap | 7.9 | 0.6 | 17.6 | 1.2 | 21.3 | 1.6 | 15.9 | 1.5 | 6.8 | 0.9 | 31.0 | 1.7 | 14.7 | 0.4 |
small gap | 2.2 | 0.3 | 11.8 | 1.0 | 7.7 | 1.0 | 18.3 | 1.6 | 12.5 | 1.2 | 14.9 | 1.3 | 9.0 | 0.4 | |
medium gap | 1.2 | 0.2 | 10.1 | 1.0 | 8.6 | 1.1 | 13.5 | 1.4 | 12.6 | 1.2 | 9.9 | 1.1 | 7.3 | 0.3 | |
large gap | 1.5 | 0.3 | 11.0 | 1.0 | 9.9 | 1.2 | 15.4 | 1.5 | 19.8 | 1.5 | 14.4 | 1.3 | 9.4 | 0.4 | |
very large gap | 0.0 | . | 1.3 | 0.4 | 1.9 | 0.5 | 0.6 | 0.3 | 1.3 | 0.4 | 1.2 | 0.4 | 0.8 | 0.1 | |
total | 12.9 | 0.7 | 51.7 | 1.6 | 49.3 | 2.0 | 63.7 | 1.9 | 52.9 | 1.8 | 71.4 | 1.6 | 41.1 | 0.6 | |
total | no gap | 61.1 | 1.0 | 34.7 | 1.5 | 42.8 | 1.9 | 24.2 | 1.8 | 18.3 | 1.4 | 41.7 | 1.7 | 43.1 | 0.6 |
small gap | 15.3 | 0.8 | 22.4 | 1.3 | 16.7 | 1.5 | 27.4 | 1.9 | 21.0 | 1.5 | 19.4 | 1.4 | 19.1 | 0.5 | |
medium gap | 10.3 | 0.7 | 19.6 | 1.3 | 16.1 | 1.4 | 22.7 | 1.7 | 23.0 | 1.6 | 16.1 | 1.3 | 16.1 | 0.5 | |
large gap | 11.9 | 0.7 | 21.1 | 1.3 | 21.4 | 1.6 | 24.7 | 1.8 | 35.7 | 1.8 | 21.1 | 1.5 | 19.9 | 0.5 | |
very large gap | 1.5 | 0.3 | 2.2 | 0.5 | 3.0 | 0.7 | 0.9 | 0.4 | 2.0 | 0.5 | 1.7 | 0.5 | 1.8 | 0.2 | |
total | 100.0 | . | 100.0 | . | 100.0 | . | 100.0 | . | 100.0 | . | 100.0 | . | 100.0 | . |
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