Fig. 9From: Improving stem quality assessment based on national forest inventory data: an approach applied to Spanish forestsKöppen-Geiger classification of the study region and SNFI-4 plots sampled. This classification system divides climates into five main climate groups: A (tropical), B (dry), C (temperate), D (continental), and E (polar). The second letter denotes the seasonal precipitation type while the third letter denotes the temperatureBack to article page