Relations of Photogrammetry Assesment of Visible Part of Tree Crown Common Oak (Quercus Robur L.) on Tree Volume : Modelling Regeneration Success and Early Growth of Forest Stands. Proceedings from the IUFRO Conference held in Copenhagen, 10-13 June 1996

Horsholm

1996

S. 540-548

8 Lit. Ang.

Bandaufführung

13704

78899

The paper deals with the relations within the photogrammetrically assessed factors working of visible parts of the common oak (Quercus robur L.) crown in the ecological management type II-G-10, measured with colour infrared aerial photography at approximate scale 1:6000, and the Leica BC3 stereo-instrument. Absolute coordinates (x,y,z) of the points on the top and along the girth of the visible crown parts were read for each tree. The research encompassed the relations among length, girth, surface, and volume of the visible parts of the crown, all measured by photogrammetry, and their influence on the tree volume (v). Their regression models were made and tested using the methods of multi-dimensional analyses. The purpose of the research is the application of the photogrammetric methods in the survey and management of forests, i.e. testing the accuracy of the mentioned elements on the aerial photography, and the applicability of the results to the direct assessment of tree volume.