百灵鸟
发表于 2025-3-25 03:31:17
Sampling Design and Estimation Procedurespulation parameters of interest, and how these are – under the infinite population or Monte-Carlo approach to forest inventory – re-shaped into and understood as continuous populations in space. The spatial arrangement of field data collection on a grid of permanently installed sample plots recently
真实的你
发表于 2025-3-25 08:17:29
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Ondines-curse
发表于 2025-3-25 14:23:06
Stereo GIS Application for Aerial-Image Interpretationwoody species as well as three reference points on each sample plot. Based on the forest boundary line and the ground cover points, it is determined whether the sample plot is a forest plot (forest/non-forest decision). The aerial-image application has been developed at WSL as an ArcGIS Desktop exte
CHURL
发表于 2025-3-25 18:26:51
Area-Wide Productsates in the Swiss National Forest Inventory (NFI), area-wide data sets are used for the two-phase estimations, which have substantially lower estimation errors than one-phase inventories. Using area-wide data sets, it is possible to skip dense manual interpretation of the stereo-images and thus save
搜寻
发表于 2025-3-25 23:39:56
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我要威胁
发表于 2025-3-26 04:10:13
Field Assessmentned 7455 sample plots, of which 6357 were accessible and classified as ‘forest’ or ‘shrub forest’. On each forest or shrub-forest sample plot, around 280 different attributes were assessed. The individual work steps for assessing a sample plot as well as the equipment and tools used, are explained i
元音
发表于 2025-3-26 07:58:01
Interview Survey with the Local Forest Servicecan be assessed in this way. During NFI1, an interview survey was therefore designed to complement the terrestrial inventory. All local Swiss foresters (about 800) responsible for the forest districts and representatives of the forest authorities (forest service) in Switzerland were interviewed. The
PON
发表于 2025-3-26 11:05:39
Time Study of the Terrestrial Inventory and Interview Survey needed for the main working stages is indispensable for planning and conducting an inventory. This Chapter describes the time needed for the different phases in the fourth Swiss National Forest Inventory (NFI4). Up to the NFI3 (2004–2006), the terrestrial inventory and the interview survey were two
名次后缀
发表于 2025-3-26 15:06:20
State and Change of Forest Resourcesvarious models: stem volume models and tariff models, models estimating volumes of large and small branches and growth models. Many of the models applied in the fourth NFI were described in previous publications, but some of them have subsequently been completed or adjusted based on methodological d
Chameleon
发表于 2025-3-26 18:54:37
Assortmentse stem form of all recorded trees is estimated based on a combination of field measurements, regression models, splines and rotational integrals. Once the stem forms are described, the potential merchantable assortments are estimated by optimising cutting points along these hypothetical boles. This