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In cooperation with EFI, Alterra / Wageningen University and Research Centre has released a set of 1x1 km tree species maps showing the distribution of 20 tree species over Europe (Brus et al. 2011).

Basic dendrometric data were gathered for 260,000 national forest inventory plot locations from 17 countries (Nabuurs 2009). In areas with national forest inventory data, area proportions covered by the 20 species were obtained by compositional kriging. For the rest of Europe a multinomial logistic regression model was fitted to ICP-level-I plots using various abiotic factors as predictors (soil, biogeographical zones, bioindicators derived from temperature and precipitation data). The regression results were iteratively scaled to fit NUTS-II forest inventory statistics and the European Forest Map (Tröltzsch et al. 2009, Schuck et al. 2002). The predictions for the twenty tree species were validated using 230 plot data separated from the calibration. For more details please refer to Brus et al. 2011. Figure 1 demonstrates the aggregated results. Underlying GIS data are available for download from EFI website after short registration.

Access the tool here