Fig. 2
From: Mapping forest age using National Forest Inventory, airborne laser scanning, and Sentinel-2 data
NFI based site index (SI) vs. predicted SI (pSI) for spruce (plots for pine and birch were similar, and are not shown); left: SI over weighted means of pSI intersecting with NFI plots; right: SI over weighted means of pSI for each NFI plot, mapped to the closest SI level. The darker the color, the more points are over-plotted. The 1:1 line is in grey and a lowess smoothed line is in red