Mirror relay
The mirror relascope is a measuring instrument for recording different parameters relevant to forest growth. It was invented in 1955 by forest scientist Walter Bitterlich and has been built in unchanged form ever since. Since then, it has been one of the most important measuring instruments in forestry internationally .
properties
A mirror relascope is roughly the size of a fist. This relatively versatile measuring instrument can be used to carry out the angle counting test to determine the base area of the stand . This size is important for estimating the standing wood supply in forests. In addition, with the help of the mirror relay, distances can be measured optically, (tree) heights, trunk diameters, slopes in the terrain and other special forest growth parameters (absolute shape height, shape numbers, shaft volume, as well as the height of the stand according to Hirata ). The inclination is automatically corrected for all measurements by the built-in drum pendulum. For precise measurements, the mirror relascope can be mounted on a special tripod with lockable ball joints and an extendable and pivotable central column.
A further development of the mirror relay is the telescope, also designed by Walter Bitterlich for the purpose of precision measurements, with an 8x telescope magnification.
literature
- Horst Kramer , Alparslan Akça: Guide to forest measurement . 3rd, expanded edition. Sauerländer, Frankfurt am Main 1995, ISBN 3-7939-0830-5
- Walter Bitterlich , Spiegel-Relaskop - manual part 1 u. 2 , Salzburg 1992
Individual evidence
- ↑ The Kosmos Forest and Forest Lexicon. Kosmos-Verlag, Stuttgart 2002. P. 648.
- ↑ Horst Kramer, Alparslan Akça: Guide to forest measurement. 3rd, expanded edition. Sauerländer, Frankfurt am Main 1995. p. 32.
- ↑ a b Walter Bitterlich, Spiegel-Relaskop - manual part 1 u. 2, Salzburg 1992.