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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 | 33.1 | 1.0 | 12.7 | 1.0 | 15.3 | 1.3 | 6.8 | 1.0 | 8.7 | 1.0 | 8.5 | 0.9 | 18.2 | 0.5 |
small gap | 32.4 | 1.0 | 14.9 | 1.1 | 15.8 | 1.4 | 9.7 | 1.2 | 14.9 | 1.2 | 7.1 | 0.9 | 19.3 | 0.5 | |
medium gap | 9.9 | 0.6 | 9.5 | 0.9 | 7.6 | 1.0 | 7.8 | 1.1 | 10.6 | 1.1 | 5.9 | 0.8 | 8.9 | 0.4 | |
large gap | 9.8 | 0.6 | 11.0 | 0.9 | 10.5 | 1.1 | 12.0 | 1.3 | 16.0 | 1.2 | 6.3 | 0.8 | 10.6 | 0.4 | |
very large gap | 1.2 | 0.2 | 0.4 | 0.2 | 0.7 | 0.3 | 0.2 | 0.2 | 0.8 | 0.3 | 0.2 | 0.2 | 0.7 | 0.1 | |
total | 86.3 | 0.7 | 48.6 | 1.5 | 49.8 | 1.8 | 36.3 | 1.8 | 51.0 | 1.7 | 28.0 | 1.4 | 57.7 | 0.5 | |
inside perimeter | no gap | 0.2 | 0.1 | 1.2 | 0.3 | 1.2 | 0.4 | 1.1 | 0.4 | 0.5 | 0.2 | 2.1 | 0.5 | 0.9 | 0.1 |
small gap | 0.2 | 0.1 | 0.3 | 0.2 | 1.6 | 0.5 | 1.5 | 0.5 | 0.6 | 0.3 | 2.0 | 0.5 | 0.8 | 0.1 | |
medium gap | 0.4 | 0.1 | 0.4 | 0.2 | 1.4 | 0.4 | 1.2 | 0.4 | 0.8 | 0.3 | 0.9 | 0.3 | 0.7 | 0.1 | |
large gap | 0.1 | 0.1 | 0.3 | 0.2 | 1.1 | 0.4 | 1.8 | 0.5 | 0.7 | 0.3 | 1.3 | 0.4 | 0.7 | 0.1 | |
very large gap | 0.0 | . | 0.0 | . | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.0 | . | 0.0 | 0.0 | |
total | 0.9 | 0.2 | 2.1 | 0.4 | 5.4 | 0.8 | 5.8 | 0.9 | 2.6 | 0.5 | 6.3 | 0.8 | 3.1 | 0.2 | |
outside perimeter | no gap | 5.3 | 0.5 | 11.3 | 1.0 | 12.8 | 1.2 | 8.6 | 1.1 | 7.0 | 0.9 | 21.5 | 1.4 | 10.0 | 0.4 |
small gap | 5.2 | 0.5 | 17.7 | 1.2 | 15.8 | 1.3 | 20.1 | 1.6 | 11.7 | 1.1 | 22.3 | 1.4 | 13.3 | 0.4 | |
medium gap | 1.2 | 0.2 | 9.6 | 0.9 | 6.5 | 0.9 | 11.4 | 1.2 | 10.0 | 1.0 | 9.3 | 1.0 | 6.6 | 0.3 | |
large gap | 1.1 | 0.2 | 10.0 | 0.9 | 9.1 | 1.1 | 16.5 | 1.4 | 16.3 | 1.2 | 12.0 | 1.1 | 8.7 | 0.3 | |
very large gap | 0.1 | 0.1 | 0.7 | 0.3 | 0.6 | 0.3 | 1.3 | 0.4 | 1.3 | 0.4 | 0.4 | 0.2 | 0.6 | 0.1 | |
total | 12.8 | 0.7 | 49.3 | 1.5 | 44.7 | 1.8 | 57.8 | 1.9 | 46.3 | 1.7 | 65.7 | 1.5 | 39.2 | 0.5 | |
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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