Fig. 7
Crown projections of the investigated trees: Silhouette lines of the high-resolution virtual crown projection (A V, inner thin line), convex hull of this projection (CHAV, outer thin line), and silhouette line of the eight-point crown projection (A8, thick line). The acronyms stand for A. campestre (Ac), A. platanoides (Apl), A. pseudoplatanus (Aps), C. betulus (Cb), Fraxinus excelsior (Fe), F. sylvatica (Fs), Q. robur (Qr), T. cordata (Tc), and T. platyphyllos (Tp). Stem diameter and position at breast height are indicated as filled circles in the graphs