Fig. 2
From: Stand-level wind damage can be assessed using diachronic photogrammetric canopy height models
Photo-interpreted map of storm damage in the area of interest (a). The map was produced by the French National Forest Inventory after the 1999 storm. The 4 damage classes are: 1) 0–10%, 2) 10–50%, 3) 50–90%, and 4) 90–100%. b The differences between the 1999 and 2002 dominant height in the area of interest. Lighter gray-tones suggest areas with heavier damage. Photo-interpreted polygons are super-imposed onto the dominant height difference map