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Topic
area
basal area
Classification
(5)
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Altitude above sea level in classes of 400 m. Reference: Digital height model DHM 25 from Swisstopo
(9)
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Altitudinal vegetation belts in the system used in the guidelines for monitoring the sustainability and performance of protection forests (NaiS; Frehner et al. 2005), reduced to six classes. The variable represents a simplification of the NaiS altitudinal vegetation belts with ten classes (NAISHSTKOMB) in which the classes «hyperinsubric» and «colline» are merged with «colline with beech» to form the class «hyperinsubric and colline» and the class «lower montane» with «upper montane» and «lower/upper montane» to form the class «lower and upper montane». The information is based on the altitudinal vegetation belts determined by experts (accessible forest sample plots of NFI4 on the 1.4-km network; Arge Frehner et al. 2020), as well as on the altitudinal vegetation belts modelled for the period 1981-2010 (other sample plots; Zischg et al. 2021).
(3)
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Measure of inter-tree crowding of the tree crowns in a stand. Reference: Field Survey (MID 266: Schlussgrad)
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Proportions of conifers and broadleaves making up the stand structure, classified according to their proportional basal areas into four classes: pure conifer forest: 91-100 % conifers, mixed conifer forest: 51-90 % conifers, mixed broadleaved forest: 11-50 % conifers and pure broadleaved forest: 0-10 % conifers. Reference: Field Survey (MID 265: Mischungsgrad)
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Combination of the 18 groups of NaiS site types, each with a similar objective for the main tree species (NAISGGROB20), into 10 large associations known as «forest formations». *As the characterisation of the site types in the NaiS-NFI project is on a small scale, it is possible that non-forest site types such as meadow, pasture and rock may be present in sample plots that are classified as «forest» in NFI. Similarly, «forest without shrub forest“ may also contain «shrub forest» site types.
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region
(24)
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Regional demarcation with the cantons as a unit, with the two half-cantons, Basel-Land and Basel-Stadt, combined into one canton for statistical reasons.
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evaluation area
(24)
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Area designated in the five Inventories NFI1 (1983-1985), NFI2 (1993-1995), NFI3 (2004-2006), NFI4 (2009-2017) and NFI5 (2018-2026) as «accessible forest without shrub forest», a.f.w.s.f. i.e. «forest without shrub forest» that can be accessed on foot and is situated in a forest that the cantons designated «protection forest» in 2022 according to the harmonised criteria of SilvaProtect-CH (Losey & Wehrli 2013).
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grid
(24)
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Sub-grids 1, 2, 3, 4 and 5 of the field surveys on the sampling grid with a mesh size of 1.4 km (base grid).
search result: 24 entries on 2 pages
12
LFI1 1983/85
canton
forest area
altitude (in 400 m classes)
protection forests (2022): a.f.w.s.f. NFI1 to NFI5
1.4 km grid, subgrids 1-5
column total, %
1000 ha
LFI1 1983/85
canton
forest area
altitudinal vegetation belts (NaiS; 6 classes)
protection forests (2022): a.f.w.s.f. NFI1 to NFI5
1.4 km grid, subgrids 1-5
column total, %
1000 ha
LFI1 1983/85
canton
forest area
forest type (12 classes)
protection forests (2022): a.f.w.s.f. NFI1 to NFI5
1.4 km grid, subgrids 1-5
column total, %
1000 ha
LFI1 1983/85
canton
forest area
slope (in 20% classes)
protection forests (2022): a.f.w.s.f. NFI1 to NFI5
1.4 km grid, subgrids 1-5
column total, %
1000 ha
LFI1 1983/85
canton
forest area
time of last treatment (in 10-year classes)
protection forests (2022): a.f.w.s.f. NFI1 to NFI5
1.4 km grid, subgrids 1-5
column total, %
1000 ha
LFI1 1983/85
canton
forest area
altitudinal vegetation belts (NaiS; 6 classes)·stand structure
protection forests (2022): a.f.w.s.f. NFI1 to NFI5
1.4 km grid, subgrids 1-5
column total, %
subtotal, %
1000 ha
LFI1 1983/85
canton
forest area
degree of mixture (terrestrial)·crown closure
protection forests (2022): a.f.w.s.f. NFI1 to NFI5
1.4 km grid, subgrids 1-5
column total, %
subtotal, %
1000 ha
LFI1 1983/85
canton
forest area
slope (in 20% classes)·altitude (in 400 m classes)
protection forests (2022): a.f.w.s.f. NFI1 to NFI5
1.4 km grid, subgrids 1-5
column total, %
subtotal, %
search result: 24 entries on 2 pages
12
Citation
Abegg, M.; Ahles, P.; Allgaier Leuch, B.; Cioldi, F.; Didion, M.; Düggelin, C.; Fischer, C.; Herold, A.; Meile, R.; Rohner, B.; Rösler, E.; Speich, S.; Temperli, C.; Traub, B.,
2023: Swiss national forest inventory NFI. Result tables and maps of the NFI surveys 1983–2022 (NFI1, NFI2, NFI3, NFI4, NFI5.1–5) on the internet. [Published online 30.05.2023] Available from the World Wide Web <http://www.lfi.ch/resultate/> . Birmensdorf, Swiss Federal Research Institute WSL