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NFI4
forest area
protection forest perimeter SilvaProtect · time of last treatment (classes of 10 years)
unit of reference: protection forest region
unit: 1000 ha
unit of evaluation: accessible forest
grid: 1.4 x 1.4 km grid
state2009/17
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern Alps Switzerland
protection forest perimeter SilvaProtecttime of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
outside of perimetern/a0.4710.0.0.0.0.0.0.0.0.0.0.471
less than 10 years ago248.5240.1721.998.31516.5115.020340.42
11-20 years ago66.1521.5914.6114.62112.7123.823123.24
21-30 years ago24.4910.7149.8143.62312.0134.92065.45
31-40 years ago13.1127.1176.2186.3188.3158.41549.36
41-50 years ago7.3167.2163.4245.0207.0175.41935.37
over 50 years ago9.71417.61016.51118.71031.5822.09116.14
total369.51104.2472.4446.5688.0449.46730.01
inside perimetern/a0.0.0.0.0.0.0.0.0.0.0.0.0.0.
less than 10 years ago30.0847.0627.5818.21018.41013.712154.93
11-20 years ago11.21322.5916.71010.61316.9107.41685.45
21-30 years ago5.21913.3128.0157.81513.8129.61457.66
31-40 years ago3.8236.9175.6186.3179.81410.71343.17
41-50 years ago2.0326.0184.2217.5165.61811.71336.97
over 50 years ago6.41714.61110.91331.0720.0974.04157.03
total58.65110.3372.9481.4384.53127.22534.91
totaln/a0.4710.0.0.0.0.0.0.0.0.0.0.471
less than 10 years ago278.5287.1449.4526.5835.0718.710495.31
11-20 years ago77.3544.0631.3715.11129.6711.213208.63
21-30 years ago29.6824.0917.81011.31325.8814.511123.04
31-40 years ago17.01114.01211.81312.61218.01019.01092.45
41-50 years ago9.21413.1127.61612.51212.71217.11072.25
over 50 years ago16.11132.2827.5849.8551.5696.13273.12
total428.11214.51145.32127.82172.52176.621264.91
© WSL, Swiss National Forest Inventory, 19.06.2020 #849447/315778
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