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Inventory

(100)
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1983/85
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Topic

(100)
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Proportion of sample plots that meet the forest definition of NFI, i.e. are covered by "forest without shrub forest" or "shrub forest".
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Classification

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Aspect, classified into the following five classes: North, East, South, West and indeterminate. «Indeterminate» means that the slope is ≤10%. Reference: Field Survey (MID 191: Azimut der Exposition)
(10)
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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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Stage of stand development, defined by the dominant diameter at breast height (dbhdom = dbh of the 100 largest [thickest] trees per hectare). Young growth/thicket: dbhdom <12 cm, pole timber: dbhdom 12-30 cm, young timber: dbhdom 31-40 cm, medium timber : dbhdom 41-50 cm, old timber: dbhdom >50 cm, mixed: trees of different development stages, no development stage predominant or groups of different development stages covering < 500 m². Reference: Field Survey (MID 261: Entwicklungsstufe)
(10)
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Slope in classes of 20%. Reference: Digital height model DHM 25 from Swisstopo
(10)
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Density of a stand – in four classes. The Stand Density Index (SDI) is calculated on the basis of the number of stems per hectare of trees and shrubs ≥12 cm in diameter at breast height (dbh) and the mean diameter. Reference: Field Survey (MID 60: Brusthöhendurchmesser, MID 62: Umfang, MID 1018: Baumzustand)
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region

(20)
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Demarcation of Switzerland into five regions (Jura, Plateau, Pre-Alps, Alps and Southern Alps) with relatively uniform growth and timber production conditions. The production regions were established by the Federal Office of Forestry long before the first National Forest Inventory (NFI1, 1983-1985). With a small exception along Lake Geneva, the boundaries of the production regions still follow the municipal boundaries of the time. Unlike the NFI, the Forestry Statistics of the Federal Statistical Office don't use the production regions as demarcation but rather the forestry zones, whose boundaries are somewhat different.
(20)
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Division of Switzerland into 14 regions (2 in the Jura, 3 on the Plateau, 3 in the Pre-Alps, 5 in the Alps and 1 in the Southern Alps). The economic regions are a subdivision of the production regions according to economic-geographical criteria.
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Demarcation of Switzerland used in NFI for protection forest analyses. The six protection forest regions were derived from the economic regions by combining individual regions according to natural and statistical criteria.
(20)
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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.
(20)
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Demarcation of Switzerland into six regions with similar flora and fauna. The six regions correspond to the basic categories in the publication «The Biogeographical Regions of Switzerland», which was published by FOEN in 2022.

evaluation area

(50)
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Forest of which less than two-thirds is covered with shrubs that can be accessed on foot.
(50)
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Forest that was less than two-thirds covered with shrubs in the five inventories NFI1 (1983-1985), NFI2 (1993-1995), NFI3 (2004-2006), NFI4 (2009-2017) and NFI5 (2018-2026) and was accessible on foot.

grid

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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).
(50)
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NFI's sampling grid with a mesh size of 1.4 km. The 1.4-km grid is the grid size covering all the previous terrestrial Inventories, which is why it is also called the base grid.
search result: 100 entries on 6 pages
LFI1 1983/85
production region
proportion of forest plots
traces of landslides
accessible forest without shrub forest
1.4-km grid
column total, %
LFI1 1983/85
production region
proportion of forest plots
traces of landslides
accessible forest without shrub forest NFI1-NFI5
1.4 km grid, subgrids 1-5
column total, %
LFI1 1983/85
economic region
proportion of forest plots
traces of landslides
accessible forest without shrub forest
1.4-km grid
column total, %
LFI1 1983/85
economic region
proportion of forest plots
traces of landslides
accessible forest without shrub forest NFI1-NFI5
1.4 km grid, subgrids 1-5
column total, %
LFI1 1983/85
protection forest region
proportion of forest plots
traces of landslides
accessible forest without shrub forest
1.4-km grid
column total, %
LFI1 1983/85
protection forest region
proportion of forest plots
traces of landslides
accessible forest without shrub forest NFI1-NFI5
1.4 km grid, subgrids 1-5
column total, %
LFI1 1983/85
canton
proportion of forest plots
traces of landslides
accessible forest without shrub forest
1.4-km grid
column total, %
LFI1 1983/85
canton
proportion of forest plots
traces of landslides
accessible forest without shrub forest NFI1-NFI5
1.4 km grid, subgrids 1-5
column total, %
LFI1 1983/85
biogeographical region
proportion of forest plots
traces of landslides
accessible forest without shrub forest
1.4-km grid
column total, %
LFI1 1983/85
biogeographical region
proportion of forest plots
traces of landslides
accessible forest without shrub forest NFI1-NFI5
1.4 km grid, subgrids 1-5
column total, %
LFI1 1983/85
production region
proportion of forest plots
traces of rockfall
accessible forest without shrub forest
1.4-km grid
column total, %
LFI1 1983/85
production region
proportion of forest plots
traces of rockfall
accessible forest without shrub forest NFI1-NFI5
1.4 km grid, subgrids 1-5
column total, %
LFI1 1983/85
economic region
proportion of forest plots
traces of rockfall
accessible forest without shrub forest
1.4-km grid
column total, %
LFI1 1983/85
economic region
proportion of forest plots
traces of rockfall
accessible forest without shrub forest NFI1-NFI5
1.4 km grid, subgrids 1-5
column total, %
LFI1 1983/85
protection forest region
proportion of forest plots
traces of rockfall
accessible forest without shrub forest
1.4-km grid
column total, %
LFI1 1983/85
protection forest region
proportion of forest plots
traces of rockfall
accessible forest without shrub forest NFI1-NFI5
1.4 km grid, subgrids 1-5
column total, %
LFI1 1983/85
canton
proportion of forest plots
traces of rockfall
accessible forest without shrub forest
1.4-km grid
column total, %
LFI1 1983/85
canton
proportion of forest plots
traces of rockfall
accessible forest without shrub forest NFI1-NFI5
1.4 km grid, subgrids 1-5
column total, %
search result: 100 entries on 6 pages

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