Point Height Intercept Analysis A Refinement of Point Analysis for Structural Quantification of Low Arboreal Vegetation

Abstract

Point Height Intercept (PHI) analysis consists of projecting a number of vertical sight-lines or rigid sampling rods through the vegetation. For any such projection three empirical observations can be made, viz, the number of points at which the sight-line or rod intercepts foliage, the species of foliage, and the vertical distance from ground to and between points intercepted. A variety of structural parameters can be calculated from a plot of this information.