Zastosowanie trygonometrycznego modelu zbieżystości do określania kształtu strzał świerka

On the basis of sectional measurements of diameters of trees from 5 sawtimber spruce stands in the Beskid Śląski and Beskid Żywiecki, a non−linear shape model for spruce stems has been developed using a trigonometric model [Bi 2000]. Subsequently, the accuracy of the proposed solution has been evaluated and compared with the accuracy of a linear model [Socha 2000]. The discussed non−linear model for describing the shape of stems is quite satisfactory, however, with regard to the accuracy of the determination of the stem morphological curve and volume this solution is inferior to the linear model.