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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 ...
When taking forest inventory the following are important things to measure and note: species, diameter at breast height (DBH), height, site quality, age, and defects. From the data collected one can calculate the number of trees per acre, the basal area , the volume of trees in an area, and the value of the timber.
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.
Calculates vertical, horizontal and slope length using angle units (degrees or percent). Wedge Calibration: Calibrates angle gauge instruments used to measure basal area. Survey: Calculates the map area, using bearings and distances, either from a traverse or by GPS. Able to annotate maps and print at different scales and import/export files to ...
The Forest Vegetation Simulator (FVS) is a forest growth and yield model developed by the United States Forest Service and is used by natural resource managers and researchers. FVS is calibrated for specific geographic areas and uses a host of simulation models to forecast forest composition and structure.
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A partial inventory uses sampling where only a subset of the trees in the community are observed to draw inferences on the whole forest. A complete inventory collects data from all trees in the population, and a cover type survey is a survey where some of the information gathered is usually done through aerial photography and GIS systems.
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