Wedge prism as a tool for diameter and distance measurement

https://doi.org/10.17221/3033-JFSCitation:Šálek L., Zahradník D. (2008): Wedge prism as a tool for diameter and distance measurement. J. For. Sci., 54: 121-124.
download PDF
The wedge prism, which is generally used for the measurement of basal area in diameter at breast height, is also a tool for the measurement of distance as well as for the measurement of diameters at a certain height of the stem, in the upper stem. Measurements using the wedge prism are based on the same principle as measurements using Bitterlich mirror relascope. This method is appropriate for non-destructive determination of stem volume. Moreover, the wedge prism can be used for the sorting of logs in standing trees when the small end of expectant assortment has to be known. As the wedge prism is a common tool for foresters, its usage seems to be larger than only the measurement of basal area.
download PDF

© 2020 Czech Academy of Agricultural Sciences