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2. Angle gauge - Wikipedia

   en.wikipedia.org/wiki/Angle_gauge

   An angle gauge is a tool used by foresters to determine which trees to measure when using a variable radius plot design in forest inventory. Using this tool a forester can quickly measure the trees that are in or out of the plot. An angle gauge is similar to a wedge prism though it must be held a fixed distance from the eye to work properly ...

3. Forest inventory - Wikipedia

   en.wikipedia.org/wiki/Forest_inventory

   Forest inventory is the systematic collection of data and forest information for assessment or analysis. ... Usually an angle gauge, wedge prism, Tunagmetor, ...

4. Relascope - Wikipedia

   en.wikipedia.org/wiki/Relascope

   The relascope, invented by Walter Bitterlich, is a multi-use instrument for forest inventory. It is primarily used to find the height of a tree, the basal area of a tree, and the diameter of a tree anywhere along the bole. This instrument is used mostly for applications involving variable radius sample plots in a forest survey.

5. Borderline tree - Wikipedia

   en.wikipedia.org/wiki/Borderline_tree

   Basal Area Factor (BAF) 5, 10, and 20 angle gauges result in PRFs of 3.89, 2.75, and 1.94 (feet inch −1) respectively. The metric equivalents of these PRFs are 0.467, 0.33, and 0.233 (m cm −1 ). When a tree is borderline, a series of measurements and calculations must be made to determine if the tree is in or out.

6. Stocking (forestry) - Wikipedia

   en.wikipedia.org/wiki/Stocking_(forestry)

   When stocking, a tree's basal area is measured. The basal area is a cross-sectional area of the stump taken about 4.5 feet (1.4 m) above the ground. [7] The equation for calculating the basal area of trees in a stand is Basal Area = 0.005454 DBH 2, where DBH is the diameter of the tree at the aforementioned measuring height. [7]

7. Line plot survey - Wikipedia

   en.wikipedia.org/wiki/Line_plot_survey

   Line plot survey is a systematic sampling technique used on land surfaces for laying out sample plots within a rectangular grid to conduct forest inventory or agricultural research. It is a specific type of systematic sampling , similar to other statistical sampling methods such as random sampling , but more straightforward to carry out in ...

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9. List of inventoried conifers in the United States - Wikipedia

   en.wikipedia.org/wiki/List_of_inventoried...

   Giant sequoia. Silvics of North America (1991), [1] a forest inventory compiled and published by the United States Forest Service, includes many conifers. [a] It superseded Silvics of Forest Trees of the United States (1965), which was the first extensive American tree inventory. [3]