Fig. 2. Location of sample LAI distribution measured in the field. The figure shows 17 sample pixels where LAI was measured using a direct/destructive method with minimal impact on the vegetation. Letter A (black box) indicates a 10 m × 10 m area initially delineated for each sample plots to minimize disturbance during leaf area measurement using the Petiole application. Letter B (red box) marks a 20 m × 20 m area assessed based on the initial measurement in letter A to further reduce disturbance. This method provides accurate ground-truth data for validating the SNAP and MVLR models (
Table 1). LAI: leaf area index; SNAP: Sentinel Application Platform; MVLR: multivariate linear regression.
