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Sirvi Raamatud Autor "Anniste, Johannes (Consultant)" järgi

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    Forest measurement with relascope : practical description for fieldwork with examples for Estonia
    (Formaks, 2013) Järvis, Jüri; Kangur, Ahto (Consultant); Sims, Allan (Consultant); Padari, Allar (Consultant); Kiviste, Andres (Consultant); Nilson, Artur (Consultant); Vaus, Mart (Consultant); Anniste, Johannes (Consultant); Põntson, Peep (Consultant); Kohava, Priit (Consultant); Matson, Tiit (Consultant)
    The relascope and relascope measurement was invented and introduced by Austrian forest scientist Walter Bitterlich (Bitterlich 1947, 1948). The method is widely used because it is simple, handy and quick. However, the method is less accurate when compared to cross-callipering forest measurement. It is used for the preliminary assessment of timber supply in a tree stand 1. Simplified relascope is also called “simple relascope”, “angle-counter”, “angle-gauge” or “angle-template”. S ocalled true relascope or mirror-relascope is a device that can automatically adjust its measured values according to the slope of the ground (photo 1). Electronic relascope can be used instead of traditional mirror-relascope (e.g. Masser RC3, photo 2). Ground slope can be adjusted automatically by inserting slope angle value. Measurement result must be adjusted when using simplified relascope on slopes with angle exceeding 8°. Simplified relascope consists of a chain or non-stretching rope with precise length and rigid slab attached to it. The slab has one or more apertures with precise width (photo 3). It is also possible to create simplified relascope on one’s own, provided that aperture width and chain/ rope length have the greatest precision. Aperture width must remain within tolerance range of 0.1 mm and the length of the chain/rope within the range of 1 mm (Kohava 2002). Instead of a slab, a pen with round crosssection can also be used (photo 4).