Fig. 8From: Static site indices from different national forest inventories: harmonization and prediction from site conditionsa Difference between the true stand htop and the calculated htop from the German NFI sample in dependence on the true stand htop for different relative stand densities. The lines mark the mean differences for each stand density. b Comparison between htop calculated from the German NFI sample and htop calculated from the French NFI sample. c Assuming a true SI the upper lines show the error in SI estimation for an assumed overestimation of age, the lower dashed lines show the error in SI estimation for an assumed underestimation of age using the Chapman-Richards functions for Norway spruceBack to article page